1 // VGA bios implementation
3 // Copyright (C) 2009 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2001-2008 the LGPL VGABios developers Team
6 // This file may be distributed under the terms of the GNU LGPLv3 license.
10 // * remove recursion from biosfn_write_teletype()
11 // * review correctness of converted asm by comparing with RBIL
12 // * refactor redundant code into sub-functions
13 // * See if there is a method to the in/out stuff that can be encapsulated.
14 // * remove "biosfn" prefixes
15 // * verify all funcs static
17 // * convert vbe/clext code
19 #include "bregs.h" // struct bregs
20 #include "biosvar.h" // GET_BDA
21 #include "util.h" // memset
22 #include "vgatables.h" // find_vga_entry
26 #define CONFIG_CIRRUS 0
29 #define DEBUG_VGA_POST 1
30 #define DEBUG_VGA_10 3
32 #define SET_VGA(var, val) SET_FARVAR(get_global_seg(), (var), (val))
35 call16_vgaint(u32 eax, u32 ebx)
47 biosfn_perform_gray_scale_summing(u16 start, u16 count)
49 vgahw_screen_disable();
51 for (i = start; i < start+count; i++) {
53 vgahw_get_dac_regs(GET_SEG(SS), rgb, i, 1);
55 // intensity = ( 0.3 * Red ) + ( 0.59 * Green ) + ( 0.11 * Blue )
56 u16 intensity = ((77 * rgb[0] + 151 * rgb[1] + 28 * rgb[2]) + 0x80) >> 8;
60 vgahw_set_dac_regs(GET_SEG(SS), rgb, i, 1);
62 vgahw_screen_enable();
66 biosfn_set_cursor_shape(u8 CH, u8 CL)
71 u16 curs = (CH << 8) + CL;
72 SET_BDA(cursor_type, curs);
74 u8 modeset_ctl = GET_BDA(modeset_ctl);
75 u16 cheight = GET_BDA(char_height);
76 if ((modeset_ctl & 0x01) && (cheight > 8) && (CL < 8) && (CH < 0x20)) {
78 CH = ((CH + 1) * cheight / 8) - 1;
80 CH = ((CL + 1) * cheight / 8) - 2;
81 CL = ((CL + 1) * cheight / 8) - 1;
83 vgahw_set_cursor_shape(CH, CL);
87 biosfn_get_cursor_shape(u8 page)
91 // FIXME should handle VGA 14/16 lines
92 return GET_BDA(cursor_type);
96 set_cursor_pos(struct cursorpos cp)
98 // Should not happen...
103 SET_BDA(cursor_pos[cp.page], (cp.y << 8) | cp.x);
105 // Set the hardware cursor
106 u8 current = GET_BDA(video_page);
107 if (cp.page != current)
110 // Get the dimensions
111 u16 nbcols = GET_BDA(video_cols);
112 u16 nbrows = GET_BDA(video_rows) + 1;
114 // Calculate the address knowing nbcols nbrows and page num
115 u16 address = (SCREEN_IO_START(nbcols, nbrows, cp.page)
116 + cp.x + cp.y * nbcols);
118 vgahw_set_cursor_pos(address);
122 get_cursor_pos(u8 page)
125 // special case - use current page
126 page = GET_BDA(video_page);
128 struct cursorpos cp = { 0, 0, 0xfe };
131 // FIXME should handle VGA 14/16 lines
132 u16 xy = GET_BDA(cursor_pos[page]);
133 struct cursorpos cp = {xy, xy>>8, page};
138 biosfn_set_active_page(u8 page)
144 struct vgamode_s *vmode_g = find_vga_entry(GET_BDA(video_mode));
148 // Get pos curs pos for the right page
149 struct cursorpos cp = get_cursor_pos(page);
152 if (GET_GLOBAL(vmode_g->memmodel) & TEXT) {
153 // Get the dimensions
154 u16 nbcols = GET_BDA(video_cols);
155 u16 nbrows = GET_BDA(video_rows) + 1;
157 // Calculate the address knowing nbcols nbrows and page num
158 address = SCREEN_MEM_START(nbcols, nbrows, page);
159 SET_BDA(video_pagestart, address);
162 address = SCREEN_IO_START(nbcols, nbrows, page);
164 struct VideoParam_s *vparam_g = GET_GLOBAL(vmode_g->vparam);
165 address = page * GET_GLOBAL(vparam_g->slength);
168 vgahw_set_active_page(address);
170 // And change the BIOS page
171 SET_BDA(video_page, page);
173 dprintf(1, "Set active page %02x address %04x\n", page, address);
175 // Display the cursor, now the page is active
180 biosfn_write_teletype(u8 page, struct carattr ca)
183 struct vgamode_s *vmode_g = find_vga_entry(GET_BDA(video_mode));
187 // Get the cursor pos for the page
188 struct cursorpos cp = get_cursor_pos(page);
190 // Get the dimensions
191 u16 nbrows = GET_BDA(video_rows) + 1;
192 u16 nbcols = GET_BDA(video_cols);
214 struct carattr dummyca = {' ', ca.attr, ca.use_attr};
215 biosfn_write_teletype(page, dummyca);
216 cp = get_cursor_pos(page);
217 } while (cp.x % 8 == 0);
221 vgafb_write_char(cp.page, ca, 1);
225 // Do we need to wrap ?
226 if (cp.x == nbcols) {
230 // Do we need to scroll ?
231 if (cp.y == nbrows) {
232 if (GET_GLOBAL(vmode_g->memmodel) & TEXT)
233 biosfn_scroll(0x01, 0x07, 0, 0, nbrows - 1, nbcols - 1, page,
236 biosfn_scroll(0x01, 0x00, 0, 0, nbrows - 1, nbcols - 1, page,
240 // Set the cursor for the page
245 biosfn_write_string(struct cursorpos cp, u8 flag, u8 attr, u16 count,
246 u16 seg, u8 *offset_far)
248 // Read curs info for the page
249 struct cursorpos oldcp = get_cursor_pos(cp.page);
251 // if row=0xff special case : use current cursor position
257 while (count-- != 0) {
258 u8 car = GET_FARVAR(seg, *offset_far);
260 if ((flag & 0x02) != 0) {
261 attr = GET_FARVAR(seg, *offset_far);
265 struct carattr ca = {car, attr, 1};
266 biosfn_write_teletype(cp.page, ca);
270 if ((flag & 0x01) == 0)
271 set_cursor_pos(oldcp);
275 set_scan_lines(u8 lines)
277 vgahw_set_scan_lines(lines);
279 biosfn_set_cursor_shape(0x06, 0x07);
281 biosfn_set_cursor_shape(lines - 4, lines - 3);
282 SET_BDA(char_height, lines);
283 u16 vde = vgahw_get_vde();
284 u8 rows = vde / lines;
285 SET_BDA(video_rows, rows - 1);
286 u16 cols = GET_BDA(video_cols);
287 SET_BDA(video_pagesize, rows * cols * 2);
291 biosfn_save_bda_state(u16 seg, struct saveBDAstate *info)
293 SET_FARVAR(seg, info->video_mode, GET_BDA(video_mode));
294 SET_FARVAR(seg, info->video_cols, GET_BDA(video_cols));
295 SET_FARVAR(seg, info->video_pagesize, GET_BDA(video_pagesize));
296 SET_FARVAR(seg, info->crtc_address, GET_BDA(crtc_address));
297 SET_FARVAR(seg, info->video_rows, GET_BDA(video_rows));
298 SET_FARVAR(seg, info->char_height, GET_BDA(char_height));
299 SET_FARVAR(seg, info->video_ctl, GET_BDA(video_ctl));
300 SET_FARVAR(seg, info->video_switches, GET_BDA(video_switches));
301 SET_FARVAR(seg, info->modeset_ctl, GET_BDA(modeset_ctl));
302 SET_FARVAR(seg, info->cursor_type, GET_BDA(cursor_type));
305 SET_FARVAR(seg, info->cursor_pos[i], GET_BDA(cursor_pos[i]));
306 SET_FARVAR(seg, info->video_pagestart, GET_BDA(video_pagestart));
307 SET_FARVAR(seg, info->video_page, GET_BDA(video_page));
309 SET_FARVAR(seg, *(u32*)&info->font0_off, GET_IVT(0x1f).segoff);
310 SET_FARVAR(seg, *(u32*)&info->font1_off, GET_IVT(0x43).segoff);
314 biosfn_restore_bda_state(u16 seg, struct saveBDAstate *info)
316 SET_BDA(video_mode, GET_FARVAR(seg, info->video_mode));
317 SET_BDA(video_cols, GET_FARVAR(seg, info->video_cols));
318 SET_BDA(video_pagesize, GET_FARVAR(seg, info->video_pagesize));
319 SET_BDA(crtc_address, GET_FARVAR(seg, info->crtc_address));
320 SET_BDA(video_rows, GET_FARVAR(seg, info->video_rows));
321 SET_BDA(char_height, GET_FARVAR(seg, info->char_height));
322 SET_BDA(video_ctl, GET_FARVAR(seg, info->video_ctl));
323 SET_BDA(video_switches, GET_FARVAR(seg, info->video_switches));
324 SET_BDA(modeset_ctl, GET_FARVAR(seg, info->modeset_ctl));
325 SET_BDA(cursor_type, GET_FARVAR(seg, info->cursor_type));
327 for (i = 0; i < 8; i++)
328 SET_BDA(cursor_pos[i], GET_FARVAR(seg, info->cursor_pos[i]));
329 SET_BDA(video_pagestart, GET_FARVAR(seg, info->video_pagestart));
330 SET_BDA(video_page, GET_FARVAR(seg, info->video_page));
332 SET_IVT(0x1f, GET_FARVAR(seg, info->font0_seg)
333 , GET_FARVAR(seg, info->font0_off));
334 SET_IVT(0x43, GET_FARVAR(seg, info->font1_seg)
335 , GET_FARVAR(seg, info->font1_off));
339 /****************************************************************
341 ****************************************************************/
345 handle_1000(struct bregs *regs)
347 u8 noclearmem = regs->al & 0x80;
348 u8 mode = regs->al & 0x7f;
359 cirrus_set_video_mode(mode);
362 if (vbe_has_vbe_display())
363 dispi_set_enable(VBE_DISPI_DISABLED);
365 // find the entry in the video modes
366 struct vgamode_s *vmode_g = find_vga_entry(mode);
367 dprintf(1, "mode search %02x found %p\n", mode, vmode_g);
371 // Read the bios mode set control
372 u8 modeset_ctl = GET_BDA(modeset_ctl);
374 // Then we know the number of lines
377 // if palette loading (bit 3 of modeset ctl = 0)
378 if ((modeset_ctl & 0x08) == 0) { // Set the PEL mask
379 vgahw_set_pel_mask(GET_GLOBAL(vmode_g->pelmask));
381 // From which palette
382 u8 *palette_g = GET_GLOBAL(vmode_g->dac);
383 u16 palsize = GET_GLOBAL(vmode_g->dacsize) / 3;
385 // Always 256*3 values
386 vgahw_set_dac_regs(get_global_seg(), palette_g, 0, palsize);
388 for (i = palsize; i < 0x0100; i++) {
389 static u8 rgb[3] VAR16;
390 vgahw_set_dac_regs(get_global_seg(), rgb, i, 1);
393 if ((modeset_ctl & 0x02) == 0x02)
394 biosfn_perform_gray_scale_summing(0x00, 0x100);
397 struct VideoParam_s *vparam_g = GET_GLOBAL(vmode_g->vparam);
398 vgahw_set_mode(vparam_g);
400 if (noclearmem == 0x00)
401 clear_screen(vmode_g);
403 // Set CRTC address VGA or MDA
404 u16 crtc_addr = VGAREG_VGA_CRTC_ADDRESS;
405 if (GET_GLOBAL(vmode_g->memmodel) == MTEXT)
406 crtc_addr = VGAREG_MDA_CRTC_ADDRESS;
409 u16 cheight = GET_GLOBAL(vparam_g->cheight);
410 SET_BDA(video_mode, mode);
411 SET_BDA(video_cols, GET_GLOBAL(vparam_g->twidth));
412 SET_BDA(video_pagesize, GET_GLOBAL(vparam_g->slength));
413 SET_BDA(crtc_address, crtc_addr);
414 SET_BDA(video_rows, GET_GLOBAL(vparam_g->theightm1));
415 SET_BDA(char_height, cheight);
416 SET_BDA(video_ctl, (0x60 | noclearmem));
417 SET_BDA(video_switches, 0xF9);
418 SET_BDA(modeset_ctl, GET_BDA(modeset_ctl) & 0x7f);
420 // FIXME We nearly have the good tables. to be reworked
421 SET_BDA(dcc_index, 0x08); // 8 is VGA should be ok for now
422 SET_BDA(video_savetable_ptr, (u32)video_save_pointer_table);
423 SET_BDA(video_savetable_seg, get_global_seg());
426 SET_BDA(video_msr, 0x00); // Unavailable on vanilla vga, but...
427 SET_BDA(video_pal, 0x00); // Unavailable on vanilla vga, but...
430 if (GET_GLOBAL(vmode_g->memmodel) & TEXT)
431 biosfn_set_cursor_shape(0x06, 0x07);
432 // Set cursor pos for page 0..7
434 for (i = 0; i < 8; i++) {
435 struct cursorpos cp = {0, 0, i};
440 biosfn_set_active_page(0x00);
442 // Write the fonts in memory
443 if (GET_GLOBAL(vmode_g->memmodel) & TEXT) {
444 call16_vgaint(0x1104, 0);
445 call16_vgaint(0x1103, 0);
447 // Set the ints 0x1F and 0x43
448 SET_IVT(0x1f, get_global_seg(), (u32)&vgafont8[128 * 8]);
452 SET_IVT(0x43, get_global_seg(), (u32)vgafont8);
455 SET_IVT(0x43, get_global_seg(), (u32)vgafont14);
458 SET_IVT(0x43, get_global_seg(), (u32)vgafont16);
464 handle_1001(struct bregs *regs)
466 biosfn_set_cursor_shape(regs->ch, regs->cl);
470 handle_1002(struct bregs *regs)
472 struct cursorpos cp = {regs->dl, regs->dh, regs->bh};
477 handle_1003(struct bregs *regs)
479 regs->cx = biosfn_get_cursor_shape(regs->bh);
480 struct cursorpos cp = get_cursor_pos(regs->bh);
485 // Read light pen pos (unimplemented)
487 handle_1004(struct bregs *regs)
490 regs->ax = regs->bx = regs->cx = regs->dx = 0;
494 handle_1005(struct bregs *regs)
496 biosfn_set_active_page(regs->al);
500 handle_1006(struct bregs *regs)
502 biosfn_scroll(regs->al, regs->bh, regs->ch, regs->cl, regs->dh, regs->dl
507 handle_1007(struct bregs *regs)
509 biosfn_scroll(regs->al, regs->bh, regs->ch, regs->cl, regs->dh, regs->dl
510 , 0xFF, SCROLL_DOWN);
514 handle_1008(struct bregs *regs)
516 struct carattr ca = vgafb_read_char(regs->bh);
522 handle_1009(struct bregs *regs)
524 struct carattr ca = {regs->al, regs->bl, 1};
525 vgafb_write_char(regs->bh, ca, regs->cx);
529 handle_100a(struct bregs *regs)
531 struct carattr ca = {regs->al, regs->bl, 0};
532 vgafb_write_char(regs->bh, ca, regs->cx);
537 handle_100b00(struct bregs *regs)
539 vgahw_set_border_color(regs->bl);
543 handle_100b01(struct bregs *regs)
545 vgahw_set_palette(regs->bl);
549 handle_100bXX(struct bregs *regs)
555 handle_100b(struct bregs *regs)
558 case 0x00: handle_100b00(regs); break;
559 case 0x01: handle_100b01(regs); break;
560 default: handle_100bXX(regs); break;
566 handle_100c(struct bregs *regs)
569 biosfn_write_pixel(regs->bh, regs->al, regs->cx, regs->dx);
573 handle_100d(struct bregs *regs)
576 biosfn_read_pixel(regs->bh, regs->cx, regs->dx, ®s->ax);
580 handle_100e(struct bregs *regs)
582 // Ralf Brown Interrupt list is WRONG on bh(page)
583 // We do output only on the current page !
584 struct carattr ca = {regs->al, regs->bl, 0};
585 biosfn_write_teletype(0xff, ca);
589 handle_100f(struct bregs *regs)
591 regs->bh = GET_BDA(video_page);
592 regs->al = GET_BDA(video_mode) | (GET_BDA(video_ctl) & 0x80);
593 regs->ah = GET_BDA(video_cols);
598 handle_101000(struct bregs *regs)
602 vgahw_set_single_palette_reg(regs->bl, regs->bh);
606 handle_101001(struct bregs *regs)
608 vgahw_set_overscan_border_color(regs->bh);
612 handle_101002(struct bregs *regs)
614 vgahw_set_all_palette_reg(regs->es, (u8*)(regs->dx + 0));
618 handle_101003(struct bregs *regs)
620 vgahw_toggle_intensity(regs->bl);
624 handle_101007(struct bregs *regs)
628 regs->bh = vgahw_get_single_palette_reg(regs->bl);
632 handle_101008(struct bregs *regs)
634 regs->bh = vgahw_get_overscan_border_color(regs);
638 handle_101009(struct bregs *regs)
640 vgahw_get_all_palette_reg(regs->es, (u8*)(regs->dx + 0));
644 handle_101010(struct bregs *regs)
646 u8 rgb[3] = {regs->dh, regs->ch, regs->cl};
647 vgahw_set_dac_regs(GET_SEG(SS), rgb, regs->bx, 1);
651 handle_101012(struct bregs *regs)
653 vgahw_set_dac_regs(regs->es, (u8*)(regs->dx + 0), regs->bx, regs->cx);
657 handle_101013(struct bregs *regs)
659 vgahw_select_video_dac_color_page(regs->bl, regs->bh);
663 handle_101015(struct bregs *regs)
666 vgahw_get_dac_regs(GET_SEG(SS), rgb, regs->bx, 1);
673 handle_101017(struct bregs *regs)
675 vgahw_get_dac_regs(regs->es, (u8*)(regs->dx + 0), regs->bx, regs->cx);
679 handle_101018(struct bregs *regs)
681 vgahw_set_pel_mask(regs->bl);
685 handle_101019(struct bregs *regs)
687 regs->bl = vgahw_get_pel_mask();
691 handle_10101a(struct bregs *regs)
693 vgahw_read_video_dac_state(®s->bl, ®s->bh);
697 handle_10101b(struct bregs *regs)
699 biosfn_perform_gray_scale_summing(regs->bx, regs->cx);
703 handle_1010XX(struct bregs *regs)
709 handle_1010(struct bregs *regs)
712 case 0x00: handle_101000(regs); break;
713 case 0x01: handle_101001(regs); break;
714 case 0x02: handle_101002(regs); break;
715 case 0x03: handle_101003(regs); break;
716 case 0x07: handle_101007(regs); break;
717 case 0x08: handle_101008(regs); break;
718 case 0x09: handle_101009(regs); break;
719 case 0x10: handle_101010(regs); break;
720 case 0x12: handle_101012(regs); break;
721 case 0x13: handle_101013(regs); break;
722 case 0x15: handle_101015(regs); break;
723 case 0x17: handle_101017(regs); break;
724 case 0x18: handle_101018(regs); break;
725 case 0x19: handle_101019(regs); break;
726 case 0x1a: handle_10101a(regs); break;
727 case 0x1b: handle_10101b(regs); break;
728 default: handle_1010XX(regs); break;
734 handle_101100(struct bregs *regs)
736 vgafb_load_font(regs->es, (void*)(regs->bp+0), regs->cx
737 , regs->dx, regs->bl, regs->bh);
741 handle_101101(struct bregs *regs)
743 vgafb_load_font(get_global_seg(), vgafont14, 0x100, 0, regs->bl, 14);
747 handle_101102(struct bregs *regs)
749 vgafb_load_font(get_global_seg(), vgafont8, 0x100, 0, regs->bl, 8);
753 handle_101103(struct bregs *regs)
755 vgahw_set_text_block_specifier(regs->bl);
759 handle_101104(struct bregs *regs)
761 vgafb_load_font(get_global_seg(), vgafont16, 0x100, 0, regs->bl, 16);
765 handle_101110(struct bregs *regs)
767 vgafb_load_font(regs->es, (void*)(regs->bp+0), regs->cx
768 , regs->dx, regs->bl, regs->bh);
769 set_scan_lines(regs->bh);
773 handle_101111(struct bregs *regs)
775 vgafb_load_font(get_global_seg(), vgafont14, 0x100, 0, regs->bl, 14);
780 handle_101112(struct bregs *regs)
782 vgafb_load_font(get_global_seg(), vgafont8, 0x100, 0, regs->bl, 8);
787 handle_101114(struct bregs *regs)
789 vgafb_load_font(get_global_seg(), vgafont16, 0x100, 0, regs->bl, 16);
794 handle_101130(struct bregs *regs)
798 u32 segoff = GET_IVT(0x1f).segoff;
799 regs->es = segoff >> 16;
804 u32 segoff = GET_IVT(0x43).segoff;
805 regs->es = segoff >> 16;
810 regs->es = get_global_seg();
811 regs->bp = (u32)vgafont14;
814 regs->es = get_global_seg();
815 regs->bp = (u32)vgafont8;
818 regs->es = get_global_seg();
819 regs->bp = (u32)vgafont8 + 128 * 8;
822 regs->es = get_global_seg();
823 regs->bp = (u32)vgafont14alt;
826 regs->es = get_global_seg();
827 regs->bp = (u32)vgafont16;
830 regs->es = get_global_seg();
831 regs->bp = (u32)vgafont16alt;
834 dprintf(1, "Get font info BH(%02x) was discarded\n", regs->bh);
837 // Set byte/char of on screen font
838 regs->cx = GET_BDA(char_height) & 0xff;
840 // Set Highest char row
841 regs->dx = GET_BDA(video_rows);
845 handle_1011XX(struct bregs *regs)
851 handle_1011(struct bregs *regs)
854 case 0x00: handle_101100(regs); break;
855 case 0x01: handle_101101(regs); break;
856 case 0x02: handle_101102(regs); break;
857 case 0x03: handle_101103(regs); break;
858 case 0x04: handle_101104(regs); break;
859 case 0x10: handle_101110(regs); break;
860 case 0x11: handle_101111(regs); break;
861 case 0x12: handle_101112(regs); break;
862 case 0x14: handle_101114(regs); break;
863 case 0x30: handle_101130(regs); break;
864 default: handle_1011XX(regs); break;
870 handle_101210(struct bregs *regs)
872 u16 crtc_addr = GET_BDA(crtc_address);
873 if (crtc_addr == VGAREG_MDA_CRTC_ADDRESS)
877 regs->cx = GET_BDA(video_switches) & 0x0f;
881 handle_101230(struct bregs *regs)
883 u8 mctl = GET_BDA(modeset_ctl);
884 u8 vswt = GET_BDA(video_switches);
888 mctl = (mctl & ~0x10) | 0x80;
889 vswt = (vswt & ~0x0f) | 0x08;
894 vswt = (vswt & ~0x0f) | 0x09;
898 mctl = (mctl & ~0x80) | 0x10;
899 vswt = (vswt & ~0x0f) | 0x09;
902 dprintf(1, "Select vert res (%02x) was discarded\n", regs->al);
905 SET_BDA(modeset_ctl, mctl);
906 SET_BDA(video_switches, vswt);
911 handle_101231(struct bregs *regs)
913 u8 v = (regs->al & 0x01) << 3;
914 u8 mctl = GET_BDA(video_ctl) & ~0x08;
915 SET_BDA(video_ctl, mctl | v);
920 handle_101232(struct bregs *regs)
922 vgahw_enable_video_addressing(regs->al);
927 handle_101233(struct bregs *regs)
929 u8 v = ((regs->al << 1) & 0x02) ^ 0x02;
930 u8 v2 = GET_BDA(modeset_ctl) & ~0x02;
931 SET_BDA(modeset_ctl, v | v2);
936 handle_101234(struct bregs *regs)
938 u8 v = (regs->al & 0x01) ^ 0x01;
939 u8 v2 = GET_BDA(modeset_ctl) & ~0x01;
940 SET_BDA(modeset_ctl, v | v2);
945 handle_101235(struct bregs *regs)
952 handle_101236(struct bregs *regs)
959 handle_1012XX(struct bregs *regs)
965 handle_1012(struct bregs *regs)
968 case 0x10: handle_101210(regs); break;
969 case 0x30: handle_101230(regs); break;
970 case 0x31: handle_101231(regs); break;
971 case 0x32: handle_101232(regs); break;
972 case 0x33: handle_101233(regs); break;
973 case 0x34: handle_101234(regs); break;
974 case 0x35: handle_101235(regs); break;
975 case 0x36: handle_101236(regs); break;
976 default: handle_1012XX(regs); break;
979 // XXX - cirrus has 1280, 1281, 1282, 1285, 129a, 12a0, 12a1, 12a2, 12ae
984 handle_1013(struct bregs *regs)
987 struct cursorpos cp = {regs->dl, regs->dh, regs->bh};
988 biosfn_write_string(cp, regs->al, regs->bl, regs->cx
989 , regs->es, (void*)(regs->bp + 0));
994 handle_101a00(struct bregs *regs)
996 regs->bx = GET_BDA(dcc_index);
1001 handle_101a01(struct bregs *regs)
1003 SET_BDA(dcc_index, regs->bl);
1004 dprintf(1, "Alternate Display code (%02x) was discarded\n", regs->bh);
1009 handle_101aXX(struct bregs *regs)
1015 handle_101a(struct bregs *regs)
1018 case 0x00: handle_101a00(regs); break;
1019 case 0x01: handle_101a01(regs); break;
1020 default: handle_101aXX(regs); break;
1026 u16 static_functionality_off;
1027 u16 static_functionality_seg;
1047 handle_101b(struct bregs *regs)
1050 struct funcInfo *info = (void*)(regs->di+0);
1051 memset_far(seg, info, 0, sizeof(*info));
1052 // Address of static functionality table
1053 SET_FARVAR(seg, info->static_functionality_off, (u32)static_functionality);
1054 SET_FARVAR(seg, info->static_functionality_seg, get_global_seg());
1056 // Hard coded copy from BIOS area. Should it be cleaner ?
1057 memcpy_far(seg, info->bda_0x49, SEG_BDA, (void*)0x49, 30);
1058 memcpy_far(seg, info->bda_0x84, SEG_BDA, (void*)0x84, 3);
1060 SET_FARVAR(seg, info->dcc_index, GET_BDA(dcc_index));
1061 SET_FARVAR(seg, info->colors, 16);
1062 SET_FARVAR(seg, info->pages, 8);
1063 SET_FARVAR(seg, info->scan_lines, 2);
1064 SET_FARVAR(seg, info->video_mem, 3);
1070 handle_101c00(struct bregs *regs)
1072 u16 flags = regs->cx;
1075 size += sizeof(struct saveVideoHardware);
1077 size += sizeof(struct saveBDAstate);
1079 size += sizeof(struct saveDACcolors);
1085 handle_101c01(struct bregs *regs)
1087 u16 flags = regs->cx;
1089 void *data = (void*)(regs->bx+0);
1091 vgahw_save_state(seg, data);
1092 data += sizeof(struct saveVideoHardware);
1095 biosfn_save_bda_state(seg, data);
1096 data += sizeof(struct saveBDAstate);
1099 vgahw_save_dac_state(seg, data);
1104 handle_101c02(struct bregs *regs)
1106 u16 flags = regs->cx;
1108 void *data = (void*)(regs->bx+0);
1110 vgahw_restore_state(seg, data);
1111 data += sizeof(struct saveVideoHardware);
1114 biosfn_restore_bda_state(seg, data);
1115 data += sizeof(struct saveBDAstate);
1118 vgahw_restore_dac_state(seg, data);
1123 handle_101cXX(struct bregs *regs)
1129 handle_101c(struct bregs *regs)
1132 case 0x00: handle_101c00(regs); break;
1133 case 0x01: handle_101c01(regs); break;
1134 case 0x02: handle_101c02(regs); break;
1135 default: handle_101cXX(regs); break;
1141 handle_104f00(struct bregs *regs)
1143 // XXX - vbe_biosfn_return_controller_information(&AX,ES,DI);
1144 // XXX - OR cirrus_vesa_00h
1148 handle_104f01(struct bregs *regs)
1150 // XXX - vbe_biosfn_return_mode_information(&AX,CX,ES,DI);
1151 // XXX - OR cirrus_vesa_01h
1155 handle_104f02(struct bregs *regs)
1157 // XXX - vbe_biosfn_set_mode(&AX,BX,ES,DI);
1158 // XXX - OR cirrus_vesa_02h
1162 handle_104f03(struct bregs *regs)
1164 // XXX - vbe_biosfn_return_current_mode
1165 // XXX - OR cirrus_vesa_03h
1169 handle_104f04(struct bregs *regs)
1171 // XXX - vbe_biosfn_save_restore_state(&AX, CX, DX, ES, &BX);
1175 handle_104f05(struct bregs *regs)
1177 // XXX - vbe_biosfn_display_window_control
1178 // XXX - OR cirrus_vesa_05h
1182 handle_104f06(struct bregs *regs)
1184 // XXX - vbe_biosfn_set_get_logical_scan_line_length
1185 // XXX - OR cirrus_vesa_06h
1189 handle_104f07(struct bregs *regs)
1191 // XXX - vbe_biosfn_set_get_display_start
1192 // XXX - OR cirrus_vesa_07h
1196 handle_104f08(struct bregs *regs)
1198 // XXX - vbe_biosfn_set_get_dac_palette_format
1202 handle_104f0a(struct bregs *regs)
1204 // XXX - vbe_biosfn_return_protected_mode_interface
1208 handle_104fXX(struct bregs *regs)
1215 handle_104f(struct bregs *regs)
1217 if (! CONFIG_VBE || !vbe_has_vbe_display()) {
1218 handle_104fXX(regs);
1223 case 0x00: handle_104f00(regs); break;
1224 case 0x01: handle_104f01(regs); break;
1225 case 0x02: handle_104f02(regs); break;
1226 case 0x03: handle_104f03(regs); break;
1227 case 0x04: handle_104f04(regs); break;
1228 case 0x05: handle_104f05(regs); break;
1229 case 0x06: handle_104f06(regs); break;
1230 case 0x07: handle_104f07(regs); break;
1231 case 0x08: handle_104f08(regs); break;
1232 case 0x0a: handle_104f0a(regs); break;
1233 default: handle_104fXX(regs); break;
1239 handle_10XX(struct bregs *regs)
1244 // INT 10h Video Support Service Entry Point
1246 handle_10(struct bregs *regs)
1248 debug_enter(regs, DEBUG_VGA_10);
1250 case 0x00: handle_1000(regs); break;
1251 case 0x01: handle_1001(regs); break;
1252 case 0x02: handle_1002(regs); break;
1253 case 0x03: handle_1003(regs); break;
1254 case 0x04: handle_1004(regs); break;
1255 case 0x05: handle_1005(regs); break;
1256 case 0x06: handle_1006(regs); break;
1257 case 0x07: handle_1007(regs); break;
1258 case 0x08: handle_1008(regs); break;
1259 case 0x09: handle_1009(regs); break;
1260 case 0x0a: handle_100a(regs); break;
1261 case 0x0b: handle_100b(regs); break;
1262 case 0x0c: handle_100c(regs); break;
1263 case 0x0d: handle_100d(regs); break;
1264 case 0x0e: handle_100e(regs); break;
1265 case 0x0f: handle_100f(regs); break;
1266 case 0x10: handle_1010(regs); break;
1267 case 0x11: handle_1011(regs); break;
1268 case 0x12: handle_1012(regs); break;
1269 case 0x13: handle_1013(regs); break;
1270 case 0x1a: handle_101a(regs); break;
1271 case 0x1b: handle_101b(regs); break;
1272 case 0x1c: handle_101c(regs); break;
1273 case 0x4f: handle_104f(regs); break;
1274 default: handle_10XX(regs); break;
1279 /****************************************************************
1281 ****************************************************************/
1286 // init detected hardware BIOS Area
1287 // set 80x25 color (not clear from RBIL but usual)
1288 u16 eqf = GET_BDA(equipment_list_flags);
1289 SET_BDA(equipment_list_flags, (eqf & 0xffcf) | 0x20);
1291 // Just for the first int10 find its children
1293 // the default char height
1294 SET_BDA(char_height, 0x10);
1297 SET_BDA(video_ctl, 0x60);
1299 // Set the basic screen we have
1300 SET_BDA(video_switches, 0xf9);
1302 // Set the basic modeset options
1303 SET_BDA(modeset_ctl, 0x51);
1305 // Set the default MSR
1306 SET_BDA(video_msr, 0x09);
1310 vga_post(struct bregs *regs)
1312 debug_enter(regs, DEBUG_VGA_POST);
1321 extern void entry_10(void);
1322 SET_IVT(0x10, get_global_seg(), (u32)entry_10);
1327 // XXX - clear screen and display info
1330 SET_VGA(video_save_pointer_table[0], (u32)video_param_table);
1331 SET_VGA(video_save_pointer_table[1], get_global_seg());
1334 extern u8 _rom_header_size, _rom_header_checksum;
1335 SET_VGA(_rom_header_checksum, 0);
1336 u8 sum = -checksum_far(get_global_seg(), 0, _rom_header_size * 512);
1337 SET_VGA(_rom_header_checksum, sum);