// TODO:
-// * define structs for save/restore state
// * review correctness of converted asm by comparing with RBIL
// * refactor redundant code into sub-functions
// * See if there is a method to the in/out stuff that can be encapsulated.
// * verify all funcs static
//
// * convert vbe/clext code
-//
-// * extract hw code from bios interfaces
#include "bregs.h" // struct bregs
#include "biosvar.h" // GET_BDA
#define SET_VGA(var, val) SET_FARVAR(get_global_seg(), (var), (val))
-
-// ===================================================================
-//
-// Video Utils
-//
-// ===================================================================
-
-// -------------------------------------------------------------------
-inline void
+static inline void
call16_vgaint(u32 eax, u32 ebx)
{
asm volatile(
: "cc", "memory");
}
-
-// ===================================================================
-//
-// BIOS functions
-//
-// ===================================================================
-
-// -------------------------------------------------------------------
static void
biosfn_perform_gray_scale_summing(u16 start, u16 count)
{
vgahw_screen_enable();
}
-// -------------------------------------------------------------------
static void
biosfn_set_cursor_shape(u8 CH, u8 CL)
{
return GET_BDA(cursor_type);
}
-// -------------------------------------------------------------------
static void
-biosfn_set_cursor_pos(u8 page, u16 cursor)
+set_cursor_pos(struct cursorpos cp)
{
// Should not happen...
- if (page > 7)
+ if (cp.page > 7)
return;
// Bios cursor pos
- SET_BDA(cursor_pos[page], cursor);
+ SET_BDA(cursor_pos[cp.page], (cp.y << 8) | cp.x);
// Set the hardware cursor
u8 current = GET_BDA(video_page);
- if (page != current)
+ if (cp.page != current)
return;
// Get the dimensions
u16 nbcols = GET_BDA(video_cols);
u16 nbrows = GET_BDA(video_rows) + 1;
- u8 xcurs = cursor & 0x00ff;
- u8 ycurs = (cursor & 0xff00) >> 8;
-
// Calculate the address knowing nbcols nbrows and page num
- u16 address = SCREEN_IO_START(nbcols, nbrows, page) + xcurs + ycurs * nbcols;
+ u16 address = (SCREEN_IO_START(nbcols, nbrows, cp.page)
+ + cp.x + cp.y * nbcols);
vgahw_set_cursor_pos(address);
}
-u16
-biosfn_get_cursor_pos(u8 page)
+static struct cursorpos
+get_cursor_pos(u8 page)
{
- if (page > 7)
- return 0;
+ if (page == 0xff)
+ // special case - use current page
+ page = GET_BDA(video_page);
+ if (page > 7) {
+ struct cursorpos cp = { 0, 0, 0xfe };
+ return cp;
+ }
// FIXME should handle VGA 14/16 lines
- return GET_BDA(cursor_pos[page]);
+ u16 xy = GET_BDA(cursor_pos[page]);
+ struct cursorpos cp = {xy, xy>>8, page};
+ return cp;
}
-// -------------------------------------------------------------------
static void
biosfn_set_active_page(u8 page)
{
return;
// Get pos curs pos for the right page
- u16 cursor = biosfn_get_cursor_pos(page);
+ struct cursorpos cp = get_cursor_pos(page);
u16 address;
- if (GET_GLOBAL(vmode_g->class) == TEXT) {
+ if (GET_GLOBAL(vmode_g->memmodel) & TEXT) {
// Get the dimensions
u16 nbcols = GET_BDA(video_cols);
u16 nbrows = GET_BDA(video_rows) + 1;
dprintf(1, "Set active page %02x address %04x\n", page, address);
// Display the cursor, now the page is active
- biosfn_set_cursor_pos(page, cursor);
+ set_cursor_pos(cp);
+}
+
+static struct cursorpos
+check_scroll(struct cursorpos cp)
+{
+ // Get the dimensions
+ u16 nbrows = GET_BDA(video_rows) + 1;
+ u16 nbcols = GET_BDA(video_cols);
+
+ // Do we need to wrap ?
+ if (cp.x == nbcols) {
+ cp.x = 0;
+ cp.y++;
+ }
+ // Do we need to scroll ?
+ if (cp.y == nbrows) {
+ struct cursorpos ul = {0, 0, cp.page};
+ struct cursorpos lr = {nbcols-1, nbrows-1, cp.page};
+ vgafb_scroll(1, -1, ul, lr);
+ cp.y--;
+ }
+
+ return cp;
+}
+
+static struct cursorpos
+write_teletype(struct cursorpos cp, struct carattr ca)
+{
+ switch (ca.car) {
+ case 7:
+ //FIXME should beep
+ break;
+
+ case 8:
+ if (cp.x > 0)
+ cp.x--;
+ break;
+
+ case '\r':
+ cp.x = 0;
+ break;
+
+ case '\n':
+ cp.y++;
+ break;
+
+ case '\t':
+ do {
+ struct carattr dummyca = {' ', ca.attr, ca.use_attr};
+ vgafb_write_char(cp, dummyca);
+ cp.x++;
+ cp = check_scroll(cp);
+ } while (cp.x % 8);
+ break;
+
+ default:
+ vgafb_write_char(cp, ca);
+ cp.x++;
+ }
+
+ return check_scroll(cp);
}
static void
-biosfn_set_video_mode(u8 mode)
-{ // mode: Bit 7 is 1 if no clear screen
+write_string(struct cursorpos cp, u8 flag, u8 attr, u16 count,
+ u16 seg, u8 *offset_far)
+{
+ // if row=0xff special case : use current cursor position
+ if (cp.y == 0xff)
+ cp = get_cursor_pos(cp.page);
+
+ while (count-- != 0) {
+ u8 car = GET_FARVAR(seg, *offset_far);
+ offset_far++;
+ if ((flag & 0x02) != 0) {
+ attr = GET_FARVAR(seg, *offset_far);
+ offset_far++;
+ }
+
+ struct carattr ca = {car, attr, 1};
+ cp = write_teletype(cp, ca);
+ }
+
+ if (flag & 0x01)
+ set_cursor_pos(cp);
+}
+
+static void
+set_scan_lines(u8 lines)
+{
+ vgahw_set_scan_lines(lines);
+ if (lines == 8)
+ biosfn_set_cursor_shape(0x06, 0x07);
+ else
+ biosfn_set_cursor_shape(lines - 4, lines - 3);
+ SET_BDA(char_height, lines);
+ u16 vde = vgahw_get_vde();
+ u8 rows = vde / lines;
+ SET_BDA(video_rows, rows - 1);
+ u16 cols = GET_BDA(video_cols);
+ SET_BDA(video_pagesize, rows * cols * 2);
+}
+
+static void
+biosfn_save_bda_state(u16 seg, struct saveBDAstate *info)
+{
+ SET_FARVAR(seg, info->video_mode, GET_BDA(video_mode));
+ SET_FARVAR(seg, info->video_cols, GET_BDA(video_cols));
+ SET_FARVAR(seg, info->video_pagesize, GET_BDA(video_pagesize));
+ SET_FARVAR(seg, info->crtc_address, GET_BDA(crtc_address));
+ SET_FARVAR(seg, info->video_rows, GET_BDA(video_rows));
+ SET_FARVAR(seg, info->char_height, GET_BDA(char_height));
+ SET_FARVAR(seg, info->video_ctl, GET_BDA(video_ctl));
+ SET_FARVAR(seg, info->video_switches, GET_BDA(video_switches));
+ SET_FARVAR(seg, info->modeset_ctl, GET_BDA(modeset_ctl));
+ SET_FARVAR(seg, info->cursor_type, GET_BDA(cursor_type));
+ u16 i;
+ for (i=0; i<8; i++)
+ SET_FARVAR(seg, info->cursor_pos[i], GET_BDA(cursor_pos[i]));
+ SET_FARVAR(seg, info->video_pagestart, GET_BDA(video_pagestart));
+ SET_FARVAR(seg, info->video_page, GET_BDA(video_page));
+ /* current font */
+ SET_FARVAR(seg, *(u32*)&info->font0_off, GET_IVT(0x1f).segoff);
+ SET_FARVAR(seg, *(u32*)&info->font1_off, GET_IVT(0x43).segoff);
+}
+
+static void
+biosfn_restore_bda_state(u16 seg, struct saveBDAstate *info)
+{
+ SET_BDA(video_mode, GET_FARVAR(seg, info->video_mode));
+ SET_BDA(video_cols, GET_FARVAR(seg, info->video_cols));
+ SET_BDA(video_pagesize, GET_FARVAR(seg, info->video_pagesize));
+ SET_BDA(crtc_address, GET_FARVAR(seg, info->crtc_address));
+ SET_BDA(video_rows, GET_FARVAR(seg, info->video_rows));
+ SET_BDA(char_height, GET_FARVAR(seg, info->char_height));
+ SET_BDA(video_ctl, GET_FARVAR(seg, info->video_ctl));
+ SET_BDA(video_switches, GET_FARVAR(seg, info->video_switches));
+ SET_BDA(modeset_ctl, GET_FARVAR(seg, info->modeset_ctl));
+ SET_BDA(cursor_type, GET_FARVAR(seg, info->cursor_type));
+ u16 i;
+ for (i = 0; i < 8; i++)
+ SET_BDA(cursor_pos[i], GET_FARVAR(seg, info->cursor_pos[i]));
+ SET_BDA(video_pagestart, GET_FARVAR(seg, info->video_pagestart));
+ SET_BDA(video_page, GET_FARVAR(seg, info->video_page));
+ /* current font */
+ SET_IVT(0x1f, GET_FARVAR(seg, info->font0_seg)
+ , GET_FARVAR(seg, info->font0_off));
+ SET_IVT(0x43, GET_FARVAR(seg, info->font1_seg)
+ , GET_FARVAR(seg, info->font1_off));
+}
+
+
+/****************************************************************
+ * VGA int 10 handler
+ ****************************************************************/
+
+// set video mode
+static void
+handle_1000(struct bregs *regs)
+{
+ u8 noclearmem = regs->al & 0x80;
+ u8 mode = regs->al & 0x7f;
+
+ // Set regs->al
+ if (mode > 7)
+ regs->al = 0x20;
+ else if (mode == 6)
+ regs->al = 0x3f;
+ else
+ regs->al = 0x30;
+
if (CONFIG_CIRRUS)
cirrus_set_video_mode(mode);
if (vbe_has_vbe_display())
dispi_set_enable(VBE_DISPI_DISABLED);
- // The real mode
- u8 noclearmem = mode & 0x80;
- mode = mode & 0x7f;
-
// find the entry in the video modes
struct vgamode_s *vmode_g = find_vga_entry(mode);
dprintf(1, "mode search %02x found %p\n", mode, vmode_g);
if (!vmode_g)
return;
- struct VideoParam_s *vparam_g = GET_GLOBAL(vmode_g->vparam);
- u16 twidth = GET_GLOBAL(vparam_g->twidth);
- u16 theightm1 = GET_GLOBAL(vparam_g->theightm1);
- u16 cheight = GET_GLOBAL(vparam_g->cheight);
-
// Read the bios mode set control
u8 modeset_ctl = GET_BDA(modeset_ctl);
// if palette loading (bit 3 of modeset ctl = 0)
if ((modeset_ctl & 0x08) == 0) { // Set the PEL mask
- outb(GET_GLOBAL(vmode_g->pelmask), VGAREG_PEL_MASK);
-
- // Set the whole dac always, from 0
- outb(0x00, VGAREG_DAC_WRITE_ADDRESS);
+ vgahw_set_pel_mask(GET_GLOBAL(vmode_g->pelmask));
// From which palette
u8 *palette_g = GET_GLOBAL(vmode_g->dac);
u16 palsize = GET_GLOBAL(vmode_g->dacsize) / 3;
+
// Always 256*3 values
+ vgahw_set_dac_regs(get_global_seg(), palette_g, 0, palsize);
u16 i;
- for (i = 0; i < 0x0100; i++) {
- if (i < palsize) {
- outb(GET_GLOBAL(palette_g[(i * 3) + 0]), VGAREG_DAC_DATA);
- outb(GET_GLOBAL(palette_g[(i * 3) + 1]), VGAREG_DAC_DATA);
- outb(GET_GLOBAL(palette_g[(i * 3) + 2]), VGAREG_DAC_DATA);
- } else {
- outb(0, VGAREG_DAC_DATA);
- outb(0, VGAREG_DAC_DATA);
- outb(0, VGAREG_DAC_DATA);
- }
+ for (i = palsize; i < 0x0100; i++) {
+ static u8 rgb[3] VAR16;
+ vgahw_set_dac_regs(get_global_seg(), rgb, i, 1);
}
+
if ((modeset_ctl & 0x02) == 0x02)
biosfn_perform_gray_scale_summing(0x00, 0x100);
}
- // Reset Attribute Ctl flip-flop
- inb(VGAREG_ACTL_RESET);
- // Set Attribute Ctl
- u16 i;
- for (i = 0; i <= 0x13; i++) {
- outb(i, VGAREG_ACTL_ADDRESS);
- outb(GET_GLOBAL(vparam_g->actl_regs[i]), VGAREG_ACTL_WRITE_DATA);
- }
- outb(0x14, VGAREG_ACTL_ADDRESS);
- outb(0x00, VGAREG_ACTL_WRITE_DATA);
-
- // Set Sequencer Ctl
- outb(0, VGAREG_SEQU_ADDRESS);
- outb(0x03, VGAREG_SEQU_DATA);
- for (i = 1; i <= 4; i++) {
- outb(i, VGAREG_SEQU_ADDRESS);
- outb(GET_GLOBAL(vparam_g->sequ_regs[i - 1]), VGAREG_SEQU_DATA);
- }
+ struct VideoParam_s *vparam_g = GET_GLOBAL(vmode_g->vparam);
+ vgahw_set_mode(vparam_g);
- // Set Grafx Ctl
- for (i = 0; i <= 8; i++) {
- outb(i, VGAREG_GRDC_ADDRESS);
- outb(GET_GLOBAL(vparam_g->grdc_regs[i]), VGAREG_GRDC_DATA);
- }
+ if (noclearmem == 0x00)
+ clear_screen(vmode_g);
// Set CRTC address VGA or MDA
u16 crtc_addr = VGAREG_VGA_CRTC_ADDRESS;
if (GET_GLOBAL(vmode_g->memmodel) == MTEXT)
crtc_addr = VGAREG_MDA_CRTC_ADDRESS;
- // Disable CRTC write protection
- outw(0x0011, crtc_addr);
- // Set CRTC regs
- for (i = 0; i <= 0x18; i++) {
- outb(i, crtc_addr);
- outb(GET_GLOBAL(vparam_g->crtc_regs[i]), crtc_addr + 1);
- }
-
- // Set the misc register
- outb(GET_GLOBAL(vparam_g->miscreg), VGAREG_WRITE_MISC_OUTPUT);
-
- // Enable video
- outb(0x20, VGAREG_ACTL_ADDRESS);
- inb(VGAREG_ACTL_RESET);
-
- if (noclearmem == 0x00) {
- if (GET_GLOBAL(vmode_g->class) == TEXT) {
- memset16_far(GET_GLOBAL(vmode_g->sstart), 0, 0x0720, 32*1024);
- } else {
- if (mode < 0x0d) {
- memset16_far(GET_GLOBAL(vmode_g->sstart), 0, 0x0000, 32*1024);
- } else {
- outb(0x02, VGAREG_SEQU_ADDRESS);
- u8 mmask = inb(VGAREG_SEQU_DATA);
- outb(0x0f, VGAREG_SEQU_DATA); // all planes
- memset16_far(GET_GLOBAL(vmode_g->sstart), 0, 0x0000, 64*1024);
- outb(mmask, VGAREG_SEQU_DATA);
- }
- }
- }
// Set the BIOS mem
+ u16 cheight = GET_GLOBAL(vparam_g->cheight);
SET_BDA(video_mode, mode);
- SET_BDA(video_cols, twidth);
+ SET_BDA(video_cols, GET_GLOBAL(vparam_g->twidth));
SET_BDA(video_pagesize, GET_GLOBAL(vparam_g->slength));
SET_BDA(crtc_address, crtc_addr);
- SET_BDA(video_rows, theightm1);
+ SET_BDA(video_rows, GET_GLOBAL(vparam_g->theightm1));
SET_BDA(char_height, cheight);
SET_BDA(video_ctl, (0x60 | noclearmem));
SET_BDA(video_switches, 0xF9);
SET_BDA(video_pal, 0x00); // Unavailable on vanilla vga, but...
// Set cursor shape
- if (GET_GLOBAL(vmode_g->class) == TEXT)
+ if (GET_GLOBAL(vmode_g->memmodel) & TEXT)
biosfn_set_cursor_shape(0x06, 0x07);
// Set cursor pos for page 0..7
- for (i = 0; i < 8; i++)
- biosfn_set_cursor_pos(i, 0x0000);
+ int i;
+ for (i = 0; i < 8; i++) {
+ struct cursorpos cp = {0, 0, i};
+ set_cursor_pos(cp);
+ }
// Set active page 0
biosfn_set_active_page(0x00);
// Write the fonts in memory
- if (GET_GLOBAL(vmode_g->class) == TEXT) {
+ if (GET_GLOBAL(vmode_g->memmodel) & TEXT) {
call16_vgaint(0x1104, 0);
call16_vgaint(0x1103, 0);
}
}
}
-// -------------------------------------------------------------------
-static void
-biosfn_write_teletype(u8 car, u8 page, u8 attr, u8 flag)
-{ // flag = WITH_ATTR / NO_ATTR
- // special case if page is 0xff, use current page
- if (page == 0xff)
- page = GET_BDA(video_page);
-
- // Get the mode
- struct vgamode_s *vmode_g = find_vga_entry(GET_BDA(video_mode));
- if (!vmode_g)
- return;
-
- // Get the cursor pos for the page
- u16 cursor = biosfn_get_cursor_pos(page);
- u8 xcurs = cursor & 0x00ff;
- u8 ycurs = (cursor & 0xff00) >> 8;
-
- // Get the dimensions
- u16 nbrows = GET_BDA(video_rows) + 1;
- u16 nbcols = GET_BDA(video_cols);
-
- switch (car) {
- case 7:
- //FIXME should beep
- break;
-
- case 8:
- if (xcurs > 0)
- xcurs--;
- break;
-
- case '\r':
- xcurs = 0;
- break;
-
- case '\n':
- ycurs++;
- break;
-
- case '\t':
- do {
- biosfn_write_teletype(' ', page, attr, flag);
- cursor = biosfn_get_cursor_pos(page);
- xcurs = cursor & 0x00ff;
- ycurs = (cursor & 0xff00) >> 8;
- } while (xcurs % 8 == 0);
- break;
-
- default:
- if (flag == WITH_ATTR)
- biosfn_write_char_attr(car, page, attr, 1);
- else
- biosfn_write_char_only(car, page, attr, 1);
- xcurs++;
- }
-
- // Do we need to wrap ?
- if (xcurs == nbcols) {
- xcurs = 0;
- ycurs++;
- }
- // Do we need to scroll ?
- if (ycurs == nbrows) {
- if (GET_GLOBAL(vmode_g->class) == TEXT)
- biosfn_scroll(0x01, 0x07, 0, 0, nbrows - 1, nbcols - 1, page,
- SCROLL_UP);
- else
- biosfn_scroll(0x01, 0x00, 0, 0, nbrows - 1, nbcols - 1, page,
- SCROLL_UP);
- ycurs -= 1;
- }
- // Set the cursor for the page
- cursor = ycurs;
- cursor <<= 8;
- cursor += xcurs;
- biosfn_set_cursor_pos(page, cursor);
-}
-
-// -------------------------------------------------------------------
-static void
-biosfn_get_video_mode(struct bregs *regs)
-{
- regs->bh = GET_BDA(video_page);
- regs->al = GET_BDA(video_mode) | (GET_BDA(video_ctl) & 0x80);
- regs->ah = GET_BDA(video_cols);
-}
-
-static void
-set_scan_lines(u8 lines)
-{
- vgahw_set_scan_lines(lines);
- if (lines == 8)
- biosfn_set_cursor_shape(0x06, 0x07);
- else
- biosfn_set_cursor_shape(lines - 4, lines - 3);
- SET_BDA(char_height, lines);
- u16 vde = vgahw_get_vde();
- u8 rows = vde / lines;
- SET_BDA(video_rows, rows - 1);
- u16 cols = GET_BDA(video_cols);
- SET_BDA(video_pagesize, rows * cols * 2);
-}
-
-// -------------------------------------------------------------------
-static void
-biosfn_get_font_info(u8 BH, u16 *ES, u16 *BP, u16 *CX, u16 *DX)
-{
- switch (BH) {
- case 0x00: {
- u32 segoff = GET_IVT(0x1f).segoff;
- *ES = segoff >> 16;
- *BP = segoff;
- break;
- }
- case 0x01: {
- u32 segoff = GET_IVT(0x43).segoff;
- *ES = segoff >> 16;
- *BP = segoff;
- break;
- }
- case 0x02:
- *ES = get_global_seg();
- *BP = (u32)vgafont14;
- break;
- case 0x03:
- *ES = get_global_seg();
- *BP = (u32)vgafont8;
- break;
- case 0x04:
- *ES = get_global_seg();
- *BP = (u32)vgafont8 + 128 * 8;
- break;
- case 0x05:
- *ES = get_global_seg();
- *BP = (u32)vgafont14alt;
- break;
- case 0x06:
- *ES = get_global_seg();
- *BP = (u32)vgafont16;
- break;
- case 0x07:
- *ES = get_global_seg();
- *BP = (u32)vgafont16alt;
- break;
- default:
- dprintf(1, "Get font info BH(%02x) was discarded\n", BH);
- return;
- }
- // Set byte/char of on screen font
- *CX = GET_BDA(char_height) & 0xff;
-
- // Set Highest char row
- *DX = GET_BDA(video_rows);
-}
-
-// -------------------------------------------------------------------
-static void
-biosfn_get_ega_info(struct bregs *regs)
-{
- regs->cx = GET_BDA(video_switches) & 0x0f;
- regs->ax = GET_BDA(crtc_address);
- if (regs->ax == VGAREG_MDA_CRTC_ADDRESS)
- regs->bx = 0x0103;
- else
- regs->bx = 0x0003;
-}
-
-// -------------------------------------------------------------------
-static void
-biosfn_select_vert_res(struct bregs *regs)
-{
- u8 mctl = GET_BDA(modeset_ctl);
- u8 vswt = GET_BDA(video_switches);
-
- switch (regs->al) {
- case 0x00:
- // 200 lines
- mctl = (mctl & ~0x10) | 0x80;
- vswt = (vswt & ~0x0f) | 0x08;
- break;
- case 0x01:
- // 350 lines
- mctl &= ~0x90;
- vswt = (vswt & ~0x0f) | 0x09;
- break;
- case 0x02:
- // 400 lines
- mctl = (mctl & ~0x80) | 0x10;
- vswt = (vswt & ~0x0f) | 0x09;
- break;
- default:
- dprintf(1, "Select vert res (%02x) was discarded\n", regs->al);
- break;
- }
- SET_BDA(modeset_ctl, mctl);
- SET_BDA(video_switches, vswt);
- regs->ax = 0x1212;
-}
-
-static void
-biosfn_enable_default_palette_loading(struct bregs *regs)
-{
- u8 v = (regs->al & 0x01) << 3;
- u8 mctl = GET_BDA(video_ctl) & ~0x08;
- SET_BDA(video_ctl, mctl | v);
- regs->ax = 0x1212;
-}
-
-
-static void
-biosfn_enable_grayscale_summing(struct bregs *regs)
-{
- u8 v = ((regs->al << 1) & 0x02) ^ 0x02;
- u8 v2 = GET_BDA(modeset_ctl) & ~0x02;
- SET_BDA(modeset_ctl, v | v2);
- regs->ax = 0x1212;
-}
-
-static void
-biosfn_enable_cursor_emulation(struct bregs *regs)
-{
- u8 v = (regs->al & 0x01) ^ 0x01;
- u8 v2 = GET_BDA(modeset_ctl) & ~0x01;
- SET_BDA(modeset_ctl, v | v2);
- regs->ax = 0x1212;
-}
-
-// -------------------------------------------------------------------
-static void
-biosfn_write_string(u8 flag, u8 page, u8 attr, u16 count, u8 row, u8 col,
- u16 seg, u8 *offset_far)
-{
- // Read curs info for the page
- u16 oldcurs = biosfn_get_cursor_pos(page);
-
- // if row=0xff special case : use current cursor position
- if (row == 0xff) {
- col = oldcurs & 0x00ff;
- row = (oldcurs & 0xff00) >> 8;
- }
-
- u16 newcurs = row;
- newcurs <<= 8;
- newcurs += col;
- biosfn_set_cursor_pos(page, newcurs);
-
- while (count-- != 0) {
- u8 car = GET_FARVAR(seg, *offset_far);
- offset_far++;
- if ((flag & 0x02) != 0) {
- attr = GET_FARVAR(seg, *offset_far);
- offset_far++;
- }
-
- biosfn_write_teletype(car, page, attr, WITH_ATTR);
- }
-
- // Set back curs pos
- if ((flag & 0x01) == 0)
- biosfn_set_cursor_pos(page, oldcurs);
-}
-
-// -------------------------------------------------------------------
-static void
-biosfn_read_display_code(struct bregs *regs)
-{
- regs->bx = GET_BDA(dcc_index);
- regs->al = 0x1a;
-}
-
-static void
-biosfn_set_display_code(struct bregs *regs)
-{
- SET_BDA(dcc_index, regs->bl);
- dprintf(1, "Alternate Display code (%02x) was discarded\n", regs->bh);
- regs->al = 0x1a;
-}
-
-// -------------------------------------------------------------------
-static void
-biosfn_read_state_info(u16 BX, u16 ES, u16 DI)
-{
- // Address of static functionality table
- SET_FARVAR(ES, *(u16*)(DI + 0x00), (u32)static_functionality);
- SET_FARVAR(ES, *(u16*)(DI + 0x02), get_global_seg());
-
- // Hard coded copy from BIOS area. Should it be cleaner ?
- memcpy_far(ES, (void*)(DI + 0x04), SEG_BDA, (void*)0x49, 30);
- memcpy_far(ES, (void*)(DI + 0x22), SEG_BDA, (void*)0x84, 3);
-
- SET_FARVAR(ES, *(u8*)(DI + 0x25), GET_BDA(dcc_index));
- SET_FARVAR(ES, *(u8*)(DI + 0x26), 0);
- SET_FARVAR(ES, *(u8*)(DI + 0x27), 16);
- SET_FARVAR(ES, *(u8*)(DI + 0x28), 0);
- SET_FARVAR(ES, *(u8*)(DI + 0x29), 8);
- SET_FARVAR(ES, *(u8*)(DI + 0x2a), 2);
- SET_FARVAR(ES, *(u8*)(DI + 0x2b), 0);
- SET_FARVAR(ES, *(u8*)(DI + 0x2c), 0);
- SET_FARVAR(ES, *(u8*)(DI + 0x31), 3);
- SET_FARVAR(ES, *(u8*)(DI + 0x32), 0);
-
- memset_far(ES, (void*)(DI + 0x33), 0, 13);
-}
-
-// -------------------------------------------------------------------
-// -------------------------------------------------------------------
-static u16
-biosfn_read_video_state_size(u16 CX)
-{
- u16 size = 0;
- if (CX & 1)
- size += 0x46;
- if (CX & 2)
- size += (5 + 8 + 5) * 2 + 6;
- if (CX & 4)
- size += 3 + 256 * 3 + 1;
- return size;
-}
-
-static u16
-biosfn_save_video_state(u16 CX, u16 ES, u16 BX)
-{
- u16 crtc_addr = GET_BDA(crtc_address);
- if (CX & 1) {
- SET_FARVAR(ES, *(u8*)(BX+0), inb(VGAREG_SEQU_ADDRESS));
- BX++;
- SET_FARVAR(ES, *(u8*)(BX+0), inb(crtc_addr));
- BX++;
- SET_FARVAR(ES, *(u8*)(BX+0), inb(VGAREG_GRDC_ADDRESS));
- BX++;
- inb(VGAREG_ACTL_RESET);
- u16 ar_index = inb(VGAREG_ACTL_ADDRESS);
- SET_FARVAR(ES, *(u8*)(BX+0), ar_index);
- BX++;
- SET_FARVAR(ES, *(u8*)(BX+0), inb(VGAREG_READ_FEATURE_CTL));
- BX++;
-
- u16 i;
- for (i = 1; i <= 4; i++) {
- outb(i, VGAREG_SEQU_ADDRESS);
- SET_FARVAR(ES, *(u8*)(BX+0), inb(VGAREG_SEQU_DATA));
- BX++;
- }
- outb(0, VGAREG_SEQU_ADDRESS);
- SET_FARVAR(ES, *(u8*)(BX+0), inb(VGAREG_SEQU_DATA));
- BX++;
-
- for (i = 0; i <= 0x18; i++) {
- outb(i, crtc_addr);
- SET_FARVAR(ES, *(u8*)(BX+0), inb(crtc_addr + 1));
- BX++;
- }
-
- for (i = 0; i <= 0x13; i++) {
- inb(VGAREG_ACTL_RESET);
- outb(i | (ar_index & 0x20), VGAREG_ACTL_ADDRESS);
- SET_FARVAR(ES, *(u8*)(BX+0), inb(VGAREG_ACTL_READ_DATA));
- BX++;
- }
- inb(VGAREG_ACTL_RESET);
-
- for (i = 0; i <= 8; i++) {
- outb(i, VGAREG_GRDC_ADDRESS);
- SET_FARVAR(ES, *(u8*)(BX+0), inb(VGAREG_GRDC_DATA));
- BX++;
- }
-
- SET_FARVAR(ES, *(u16*)(BX+0), crtc_addr);
- BX += 2;
-
- /* XXX: read plane latches */
- SET_FARVAR(ES, *(u8*)(BX+0), 0);
- BX++;
- SET_FARVAR(ES, *(u8*)(BX+0), 0);
- BX++;
- SET_FARVAR(ES, *(u8*)(BX+0), 0);
- BX++;
- SET_FARVAR(ES, *(u8*)(BX+0), 0);
- BX++;
- }
- if (CX & 2) {
- SET_FARVAR(ES, *(u8*)(BX+0), GET_BDA(video_mode));
- BX++;
- SET_FARVAR(ES, *(u16*)(BX+0), GET_BDA(video_cols));
- BX += 2;
- SET_FARVAR(ES, *(u16*)(BX+0), GET_BDA(video_pagesize));
- BX += 2;
- SET_FARVAR(ES, *(u16*)(BX+0), GET_BDA(crtc_address));
- BX += 2;
- SET_FARVAR(ES, *(u8*)(BX+0), GET_BDA(video_rows));
- BX++;
- SET_FARVAR(ES, *(u16*)(BX+0), GET_BDA(char_height));
- BX += 2;
- SET_FARVAR(ES, *(u8*)(BX+0), GET_BDA(video_ctl));
- BX++;
- SET_FARVAR(ES, *(u8*)(BX+0), GET_BDA(video_switches));
- BX++;
- SET_FARVAR(ES, *(u8*)(BX+0), GET_BDA(modeset_ctl));
- BX++;
- SET_FARVAR(ES, *(u16*)(BX+0), GET_BDA(cursor_type));
- BX += 2;
- u16 i;
- for (i = 0; i < 8; i++) {
- SET_FARVAR(ES, *(u16*)(BX+0), GET_BDA(cursor_pos[i]));
- BX += 2;
- }
- SET_FARVAR(ES, *(u16*)(BX+0), GET_BDA(video_pagestart));
- BX += 2;
- SET_FARVAR(ES, *(u8*)(BX+0), GET_BDA(video_page));
- BX++;
- /* current font */
- SET_FARVAR(ES, *(u32*)(BX+0), GET_IVT(0x1f).segoff);
- BX += 4;
- SET_FARVAR(ES, *(u32*)(BX+0), GET_IVT(0x43).segoff);
- BX += 4;
- }
- if (CX & 4) {
- /* XXX: check this */
- SET_FARVAR(ES, *(u8*)(BX+0), inb(VGAREG_DAC_STATE));
- BX++; /* read/write mode dac */
- SET_FARVAR(ES, *(u8*)(BX+0), inb(VGAREG_DAC_WRITE_ADDRESS));
- BX++; /* pix address */
- SET_FARVAR(ES, *(u8*)(BX+0), inb(VGAREG_PEL_MASK));
- BX++;
- // Set the whole dac always, from 0
- outb(0x00, VGAREG_DAC_WRITE_ADDRESS);
- u16 i;
- for (i = 0; i < 256 * 3; i++) {
- SET_FARVAR(ES, *(u8*)(BX+0), inb(VGAREG_DAC_DATA));
- BX++;
- }
- SET_FARVAR(ES, *(u8*)(BX+0), 0);
- BX++; /* color select register */
- }
- return BX;
-}
-
-static u16
-biosfn_restore_video_state(u16 CX, u16 ES, u16 BX)
-{
- if (CX & 1) {
- // Reset Attribute Ctl flip-flop
- inb(VGAREG_ACTL_RESET);
-
- u16 crtc_addr = GET_FARVAR(ES, *(u16*)(BX + 0x40));
- u16 addr1 = BX;
- BX += 5;
-
- u16 i;
- for (i = 1; i <= 4; i++) {
- outb(i, VGAREG_SEQU_ADDRESS);
- outb(GET_FARVAR(ES, *(u8*)(BX+0)), VGAREG_SEQU_DATA);
- BX++;
- }
- outb(0, VGAREG_SEQU_ADDRESS);
- outb(GET_FARVAR(ES, *(u8*)(BX+0)), VGAREG_SEQU_DATA);
- BX++;
-
- // Disable CRTC write protection
- outw(0x0011, crtc_addr);
- // Set CRTC regs
- for (i = 0; i <= 0x18; i++) {
- if (i != 0x11) {
- outb(i, crtc_addr);
- outb(GET_FARVAR(ES, *(u8*)(BX+0)), crtc_addr + 1);
- }
- BX++;
- }
- // select crtc base address
- u16 v = inb(VGAREG_READ_MISC_OUTPUT) & ~0x01;
- if (crtc_addr == VGAREG_VGA_CRTC_ADDRESS)
- v |= 0x01;
- outb(v, VGAREG_WRITE_MISC_OUTPUT);
-
- // enable write protection if needed
- outb(0x11, crtc_addr);
- outb(GET_FARVAR(ES, *(u8*)(BX - 0x18 + 0x11)), crtc_addr + 1);
-
- // Set Attribute Ctl
- u16 ar_index = GET_FARVAR(ES, *(u8*)(addr1 + 0x03));
- inb(VGAREG_ACTL_RESET);
- for (i = 0; i <= 0x13; i++) {
- outb(i | (ar_index & 0x20), VGAREG_ACTL_ADDRESS);
- outb(GET_FARVAR(ES, *(u8*)(BX+0)), VGAREG_ACTL_WRITE_DATA);
- BX++;
- }
- outb(ar_index, VGAREG_ACTL_ADDRESS);
- inb(VGAREG_ACTL_RESET);
-
- for (i = 0; i <= 8; i++) {
- outb(i, VGAREG_GRDC_ADDRESS);
- outb(GET_FARVAR(ES, *(u8*)(BX+0)), VGAREG_GRDC_DATA);
- BX++;
- }
- BX += 2; /* crtc_addr */
- BX += 4; /* plane latches */
-
- outb(GET_FARVAR(ES, *(u8*)(addr1+0)), VGAREG_SEQU_ADDRESS);
- addr1++;
- outb(GET_FARVAR(ES, *(u8*)(addr1+0)), crtc_addr);
- addr1++;
- outb(GET_FARVAR(ES, *(u8*)(addr1+0)), VGAREG_GRDC_ADDRESS);
- addr1++;
- addr1++;
- outb(GET_FARVAR(ES, *(u8*)(addr1+0)), crtc_addr - 0x4 + 0xa);
- addr1++;
- }
- if (CX & 2) {
- SET_BDA(video_mode, GET_FARVAR(ES, *(u8*)(BX+0)));
- BX++;
- SET_BDA(video_cols, GET_FARVAR(ES, *(u16*)(BX+0)));
- BX += 2;
- SET_BDA(video_pagesize, GET_FARVAR(ES, *(u16*)(BX+0)));
- BX += 2;
- SET_BDA(crtc_address, GET_FARVAR(ES, *(u16*)(BX+0)));
- BX += 2;
- SET_BDA(video_rows, GET_FARVAR(ES, *(u8*)(BX+0)));
- BX++;
- SET_BDA(char_height, GET_FARVAR(ES, *(u16*)(BX+0)));
- BX += 2;
- SET_BDA(video_ctl, GET_FARVAR(ES, *(u8*)(BX+0)));
- BX++;
- SET_BDA(video_switches, GET_FARVAR(ES, *(u8*)(BX+0)));
- BX++;
- SET_BDA(modeset_ctl, GET_FARVAR(ES, *(u8*)(BX+0)));
- BX++;
- SET_BDA(cursor_type, GET_FARVAR(ES, *(u16*)(BX+0)));
- BX += 2;
- u16 i;
- for (i = 0; i < 8; i++) {
- SET_BDA(cursor_pos[i], GET_FARVAR(ES, *(u16*)(BX+0)));
- BX += 2;
- }
- SET_BDA(video_pagestart, GET_FARVAR(ES, *(u16*)(BX+0)));
- BX += 2;
- SET_BDA(video_page, GET_FARVAR(ES, *(u8*)(BX+0)));
- BX++;
- /* current font */
- SET_IVT(0x1f, GET_FARVAR(ES, *(u16*)(BX+2)), GET_FARVAR(ES, *(u16*)(BX+0)));
- BX += 4;
- SET_IVT(0x43, GET_FARVAR(ES, *(u16*)(BX+2)), GET_FARVAR(ES, *(u16*)(BX+0)));
- BX += 4;
- }
- if (CX & 4) {
- BX++;
- u16 v = GET_FARVAR(ES, *(u8*)(BX+0));
- BX++;
- outb(GET_FARVAR(ES, *(u8*)(BX+0)), VGAREG_PEL_MASK);
- BX++;
- // Set the whole dac always, from 0
- outb(0x00, VGAREG_DAC_WRITE_ADDRESS);
- u16 i;
- for (i = 0; i < 256 * 3; i++) {
- outb(GET_FARVAR(ES, *(u8*)(BX+0)), VGAREG_DAC_DATA);
- BX++;
- }
- BX++;
- outb(v, VGAREG_DAC_WRITE_ADDRESS);
- }
- return BX;
-}
-
-
-/****************************************************************
- * VGA int 10 handler
- ****************************************************************/
-
-static void
-handle_1000(struct bregs *regs)
-{
- // XXX - inline
- biosfn_set_video_mode(regs->al);
- switch(regs->al & 0x7F) {
- case 6:
- regs->al = 0x3F;
- break;
- case 0:
- case 1:
- case 2:
- case 3:
- case 4:
- case 5:
- case 7:
- regs->al = 0x30;
- break;
- default:
- regs->al = 0x20;
- }
-}
-
static void
handle_1001(struct bregs *regs)
{
static void
handle_1002(struct bregs *regs)
{
- biosfn_set_cursor_pos(regs->bh, regs->dx);
+ struct cursorpos cp = {regs->dl, regs->dh, regs->bh};
+ set_cursor_pos(cp);
}
static void
handle_1003(struct bregs *regs)
{
regs->cx = biosfn_get_cursor_shape(regs->bh);
- regs->dx = biosfn_get_cursor_pos(regs->bh);
+ struct cursorpos cp = get_cursor_pos(regs->bh);
+ regs->dl = cp.x;
+ regs->dh = cp.y;
}
// Read light pen pos (unimplemented)
biosfn_set_active_page(regs->al);
}
+static void
+verify_scroll(struct bregs *regs, int dir)
+{
+ u8 page = GET_BDA(video_page);
+ struct cursorpos ul = {regs->cl, regs->ch, page};
+ struct cursorpos lr = {regs->dl, regs->dh, page};
+
+ u16 nbrows = GET_BDA(video_rows) + 1;
+ if (lr.y >= nbrows)
+ lr.y = nbrows - 1;
+ u16 nbcols = GET_BDA(video_cols);
+ if (lr.x >= nbcols)
+ lr.x = nbcols - 1;
+
+ if (ul.x > lr.x || ul.y > lr.y)
+ return;
+
+ u16 nblines = regs->al;
+ if (!nblines || nblines > lr.y - ul.y + 1)
+ nblines = lr.y - ul.y + 1;
+
+ vgafb_scroll(dir * nblines, regs->bh, ul, lr);
+}
+
static void
handle_1006(struct bregs *regs)
{
- biosfn_scroll(regs->al, regs->bh, regs->ch, regs->cl, regs->dh, regs->dl
- , 0xFF, SCROLL_UP);
+ verify_scroll(regs, 1);
}
static void
handle_1007(struct bregs *regs)
{
- biosfn_scroll(regs->al, regs->bh, regs->ch, regs->cl, regs->dh, regs->dl
- , 0xFF, SCROLL_DOWN);
+ verify_scroll(regs, -1);
}
static void
handle_1008(struct bregs *regs)
{
- // XXX - inline
- biosfn_read_char_attr(regs->bh, ®s->ax);
+ struct carattr ca = vgafb_read_char(get_cursor_pos(regs->bh));
+ regs->al = ca.car;
+ regs->ah = ca.attr;
+}
+
+static void
+write_chars(u8 page, struct carattr ca, u16 count)
+{
+ struct cursorpos cp = get_cursor_pos(page);
+ while (count--) {
+ vgafb_write_char(cp, ca);
+ cp.x++;
+ }
}
static void
handle_1009(struct bregs *regs)
{
- // XXX - inline
- biosfn_write_char_attr(regs->al, regs->bh, regs->bl, regs->cx);
+ struct carattr ca = {regs->al, regs->bl, 1};
+ write_chars(regs->bh, ca, regs->cx);
}
static void
handle_100a(struct bregs *regs)
{
- // XXX - inline
- biosfn_write_char_only(regs->al, regs->bh, regs->bl, regs->cx);
+ struct carattr ca = {regs->al, regs->bl, 0};
+ write_chars(regs->bh, ca, regs->cx);
}
{
// Ralf Brown Interrupt list is WRONG on bh(page)
// We do output only on the current page !
- biosfn_write_teletype(regs->al, 0xff, regs->bl, NO_ATTR);
+ struct carattr ca = {regs->al, regs->bl, 0};
+ struct cursorpos cp = get_cursor_pos(0xff);
+ cp = write_teletype(cp, ca);
+ set_cursor_pos(cp);
}
static void
handle_100f(struct bregs *regs)
{
- // XXX - inline
- biosfn_get_video_mode(regs);
+ regs->bh = GET_BDA(video_page);
+ regs->al = GET_BDA(video_mode) | (GET_BDA(video_ctl) & 0x80);
+ regs->ah = GET_BDA(video_cols);
}
static void
handle_101100(struct bregs *regs)
{
- biosfn_load_text_user_pat(regs->es, regs->bp
- , regs->cx, regs->dx, regs->bl, regs->bh);
+ vgafb_load_font(regs->es, (void*)(regs->bp+0), regs->cx
+ , regs->dx, regs->bl, regs->bh);
}
static void
handle_101101(struct bregs *regs)
{
- biosfn_load_text_8_14_pat(regs->bl);
+ vgafb_load_font(get_global_seg(), vgafont14, 0x100, 0, regs->bl, 14);
}
static void
handle_101102(struct bregs *regs)
{
- biosfn_load_text_8_8_pat(regs->bl);
+ vgafb_load_font(get_global_seg(), vgafont8, 0x100, 0, regs->bl, 8);
}
static void
static void
handle_101104(struct bregs *regs)
{
- biosfn_load_text_8_16_pat(regs->bl);
+ vgafb_load_font(get_global_seg(), vgafont16, 0x100, 0, regs->bl, 16);
}
static void
handle_101110(struct bregs *regs)
{
- biosfn_load_text_user_pat(regs->es, regs->bp
- , regs->cx, regs->dx, regs->bl, regs->bh);
+ vgafb_load_font(regs->es, (void*)(regs->bp+0), regs->cx
+ , regs->dx, regs->bl, regs->bh);
set_scan_lines(regs->bh);
}
static void
handle_101111(struct bregs *regs)
{
- biosfn_load_text_8_14_pat(regs->bl);
+ vgafb_load_font(get_global_seg(), vgafont14, 0x100, 0, regs->bl, 14);
set_scan_lines(14);
}
static void
handle_101112(struct bregs *regs)
{
- biosfn_load_text_8_8_pat(regs->bl);
+ vgafb_load_font(get_global_seg(), vgafont8, 0x100, 0, regs->bl, 8);
set_scan_lines(8);
}
static void
handle_101114(struct bregs *regs)
{
- biosfn_load_text_8_16_pat(regs->bl);
+ vgafb_load_font(get_global_seg(), vgafont16, 0x100, 0, regs->bl, 16);
set_scan_lines(16);
}
static void
handle_101130(struct bregs *regs)
{
- // XXX - inline
- biosfn_get_font_info(regs->bh, ®s->es, ®s->bp
- , ®s->cx, ®s->dx);
+ switch (regs->bh) {
+ case 0x00: {
+ u32 segoff = GET_IVT(0x1f).segoff;
+ regs->es = segoff >> 16;
+ regs->bp = segoff;
+ break;
+ }
+ case 0x01: {
+ u32 segoff = GET_IVT(0x43).segoff;
+ regs->es = segoff >> 16;
+ regs->bp = segoff;
+ break;
+ }
+ case 0x02:
+ regs->es = get_global_seg();
+ regs->bp = (u32)vgafont14;
+ break;
+ case 0x03:
+ regs->es = get_global_seg();
+ regs->bp = (u32)vgafont8;
+ break;
+ case 0x04:
+ regs->es = get_global_seg();
+ regs->bp = (u32)vgafont8 + 128 * 8;
+ break;
+ case 0x05:
+ regs->es = get_global_seg();
+ regs->bp = (u32)vgafont14alt;
+ break;
+ case 0x06:
+ regs->es = get_global_seg();
+ regs->bp = (u32)vgafont16;
+ break;
+ case 0x07:
+ regs->es = get_global_seg();
+ regs->bp = (u32)vgafont16alt;
+ break;
+ default:
+ dprintf(1, "Get font info BH(%02x) was discarded\n", regs->bh);
+ return;
+ }
+ // Set byte/char of on screen font
+ regs->cx = GET_BDA(char_height) & 0xff;
+
+ // Set Highest char row
+ regs->dx = GET_BDA(video_rows);
}
static void
static void
handle_101210(struct bregs *regs)
{
- // XXX - inline
- biosfn_get_ega_info(regs);
+ u16 crtc_addr = GET_BDA(crtc_address);
+ if (crtc_addr == VGAREG_MDA_CRTC_ADDRESS)
+ regs->bx = 0x0103;
+ else
+ regs->bx = 0x0003;
+ regs->cx = GET_BDA(video_switches) & 0x0f;
}
static void
handle_101230(struct bregs *regs)
{
- // XXX - inline
- biosfn_select_vert_res(regs);
+ u8 mctl = GET_BDA(modeset_ctl);
+ u8 vswt = GET_BDA(video_switches);
+ switch (regs->al) {
+ case 0x00:
+ // 200 lines
+ mctl = (mctl & ~0x10) | 0x80;
+ vswt = (vswt & ~0x0f) | 0x08;
+ break;
+ case 0x01:
+ // 350 lines
+ mctl &= ~0x90;
+ vswt = (vswt & ~0x0f) | 0x09;
+ break;
+ case 0x02:
+ // 400 lines
+ mctl = (mctl & ~0x80) | 0x10;
+ vswt = (vswt & ~0x0f) | 0x09;
+ break;
+ default:
+ dprintf(1, "Select vert res (%02x) was discarded\n", regs->al);
+ break;
+ }
+ SET_BDA(modeset_ctl, mctl);
+ SET_BDA(video_switches, vswt);
+ regs->al = 0x12;
}
static void
handle_101231(struct bregs *regs)
{
- // XXX - inline
- biosfn_enable_default_palette_loading(regs);
+ u8 v = (regs->al & 0x01) << 3;
+ u8 mctl = GET_BDA(video_ctl) & ~0x08;
+ SET_BDA(video_ctl, mctl | v);
+ regs->al = 0x12;
}
static void
static void
handle_101233(struct bregs *regs)
{
- // XXX - inline
- biosfn_enable_grayscale_summing(regs);
+ u8 v = ((regs->al << 1) & 0x02) ^ 0x02;
+ u8 v2 = GET_BDA(modeset_ctl) & ~0x02;
+ SET_BDA(modeset_ctl, v | v2);
+ regs->al = 0x12;
}
static void
handle_101234(struct bregs *regs)
{
- // XXX - inline
- biosfn_enable_cursor_emulation(regs);
+ u8 v = (regs->al & 0x01) ^ 0x01;
+ u8 v2 = GET_BDA(modeset_ctl) & ~0x01;
+ SET_BDA(modeset_ctl, v | v2);
+ regs->al = 0x12;
}
static void
handle_1013(struct bregs *regs)
{
// XXX - inline
- biosfn_write_string(regs->al, regs->bh, regs->bl, regs->cx
- , regs->dh, regs->dl, regs->es, (void*)(regs->bp + 0));
+ struct cursorpos cp = {regs->dl, regs->dh, regs->bh};
+ write_string(cp, regs->al, regs->bl, regs->cx
+ , regs->es, (void*)(regs->bp + 0));
}
static void
handle_101a00(struct bregs *regs)
{
- // XXX - inline
- biosfn_read_display_code(regs);
+ regs->bx = GET_BDA(dcc_index);
+ regs->al = 0x1a;
}
static void
handle_101a01(struct bregs *regs)
{
- // XXX - inline
- biosfn_set_display_code(regs);
+ SET_BDA(dcc_index, regs->bl);
+ dprintf(1, "Alternate Display code (%02x) was discarded\n", regs->bh);
+ regs->al = 0x1a;
}
static void
}
+struct funcInfo {
+ u16 static_functionality_off;
+ u16 static_functionality_seg;
+ u8 bda_0x49[30];
+ u8 bda_0x84[3];
+ u8 dcc_index;
+ u8 dcc_alt;
+ u16 colors;
+ u8 pages;
+ u8 scan_lines;
+ u8 primary_char;
+ u8 secondar_char;
+ u8 misc;
+ u8 non_vga_mode;
+ u8 reserved_2f[2];
+ u8 video_mem;
+ u8 save_flags;
+ u8 disp_info;
+ u8 reserved_34[12];
+};
+
static void
handle_101b(struct bregs *regs)
{
- // XXX - inline
- biosfn_read_state_info(regs->bx, regs->es, regs->di);
+ u16 seg = regs->es;
+ struct funcInfo *info = (void*)(regs->di+0);
+ memset_far(seg, info, 0, sizeof(*info));
+ // Address of static functionality table
+ SET_FARVAR(seg, info->static_functionality_off, (u32)static_functionality);
+ SET_FARVAR(seg, info->static_functionality_seg, get_global_seg());
+
+ // Hard coded copy from BIOS area. Should it be cleaner ?
+ memcpy_far(seg, info->bda_0x49, SEG_BDA, (void*)0x49, 30);
+ memcpy_far(seg, info->bda_0x84, SEG_BDA, (void*)0x84, 3);
+
+ SET_FARVAR(seg, info->dcc_index, GET_BDA(dcc_index));
+ SET_FARVAR(seg, info->colors, 16);
+ SET_FARVAR(seg, info->pages, 8);
+ SET_FARVAR(seg, info->scan_lines, 2);
+ SET_FARVAR(seg, info->video_mem, 3);
regs->al = 0x1B;
}
static void
handle_101c00(struct bregs *regs)
{
- // XXX - inline
- regs->bx = biosfn_read_video_state_size(regs->cx);
+ u16 flags = regs->cx;
+ u16 size = 0;
+ if (flags & 1)
+ size += sizeof(struct saveVideoHardware);
+ if (flags & 2)
+ size += sizeof(struct saveBDAstate);
+ if (flags & 4)
+ size += sizeof(struct saveDACcolors);
+ regs->bx = size;
+ regs->al = 0x1c;
}
static void
handle_101c01(struct bregs *regs)
{
- // XXX - inline
- biosfn_save_video_state(regs->cx, regs->es, regs->bx);
+ u16 flags = regs->cx;
+ u16 seg = regs->es;
+ void *data = (void*)(regs->bx+0);
+ if (flags & 1) {
+ vgahw_save_state(seg, data);
+ data += sizeof(struct saveVideoHardware);
+ }
+ if (flags & 2) {
+ biosfn_save_bda_state(seg, data);
+ data += sizeof(struct saveBDAstate);
+ }
+ if (flags & 4)
+ vgahw_save_dac_state(seg, data);
+ regs->al = 0x1c;
}
static void
handle_101c02(struct bregs *regs)
{
- // XXX - inline
- biosfn_restore_video_state(regs->cx, regs->es, regs->bx);
+ u16 flags = regs->cx;
+ u16 seg = regs->es;
+ void *data = (void*)(regs->bx+0);
+ if (flags & 1) {
+ vgahw_restore_state(seg, data);
+ data += sizeof(struct saveVideoHardware);
+ }
+ if (flags & 2) {
+ biosfn_restore_bda_state(seg, data);
+ data += sizeof(struct saveBDAstate);
+ }
+ if (flags & 4)
+ vgahw_restore_dac_state(seg, data);
+ regs->al = 0x1c;
}
static void
projects / seabios.git / blobdiff