#include "biosvar.h" // struct bregs
#include "util.h" // debug_enter
#include "disk.h" // floppy_tick
+#include "cmos.h" // inb_cmos
+
+static void
+init_rtc()
+{
+ outb_cmos(0x26, CMOS_STATUS_A);
+ outb_cmos(0x02, CMOS_STATUS_B);
+ inb_cmos(CMOS_STATUS_C);
+ inb_cmos(CMOS_STATUS_D);
+}
+
+static u8
+rtc_updating()
+{
+ // This function checks to see if the update-in-progress bit
+ // is set in CMOS Status Register A. If not, it returns 0.
+ // If it is set, it tries to wait until there is a transition
+ // to 0, and will return 0 if such a transition occurs. A 1
+ // is returned only after timing out. The maximum period
+ // that this bit should be set is constrained to 244useconds.
+ // The count I use below guarantees coverage or more than
+ // this time, with any reasonable IPS setting.
+
+ u16 count = 25000;
+ while (--count != 0) {
+ if ( (inb_cmos(CMOS_STATUS_A) & 0x80) == 0 )
+ return 0;
+ }
+ return 1; // update-in-progress never transitioned to 0
+}
+
+// get current clock count
+static void
+handle_1a00(struct bregs *regs)
+{
+ u32 ticks = GET_BDA(timer_counter);
+ regs->cx = ticks >> 16;
+ regs->dx = ticks;
+ regs->al = GET_BDA(timer_rollover);
+ SET_BDA(timer_rollover, 0); // reset flag
+ set_cf(regs, 0);
+}
+
+// Set Current Clock Count
+static void
+handle_1a01(struct bregs *regs)
+{
+ u32 ticks = (regs->cx << 16) | regs->dx;
+ SET_BDA(timer_counter, ticks);
+ SET_BDA(timer_rollover, 0); // reset flag
+ regs->ah = 0;
+ set_cf(regs, 0);
+}
+
+// Read CMOS Time
+static void
+handle_1a02(struct bregs *regs)
+{
+ if (rtc_updating()) {
+ set_cf(regs, 1);
+ return;
+ }
+
+ regs->dh = inb_cmos(CMOS_RTC_SECONDS);
+ regs->cl = inb_cmos(CMOS_RTC_MINUTES);
+ regs->ch = inb_cmos(CMOS_RTC_HOURS);
+ regs->dl = inb_cmos(CMOS_STATUS_B) & 0x01;
+ regs->ah = 0;
+ regs->al = regs->ch;
+ set_cf(regs, 0);
+}
+
+// Set CMOS Time
+static void
+handle_1a03(struct bregs *regs)
+{
+ // Using a debugger, I notice the following masking/setting
+ // of bits in Status Register B, by setting Reg B to
+ // a few values and getting its value after INT 1A was called.
+ //
+ // try#1 try#2 try#3
+ // before 1111 1101 0111 1101 0000 0000
+ // after 0110 0010 0110 0010 0000 0010
+ //
+ // Bit4 in try#1 flipped in hardware (forced low) due to bit7=1
+ // My assumption: RegB = ((RegB & 01100000b) | 00000010b)
+ if (rtc_updating()) {
+ init_rtc();
+ // fall through as if an update were not in progress
+ }
+ outb_cmos(regs->dh, CMOS_RTC_SECONDS);
+ outb_cmos(regs->cl, CMOS_RTC_MINUTES);
+ outb_cmos(regs->ch, CMOS_RTC_HOURS);
+ // Set Daylight Savings time enabled bit to requested value
+ u8 val8 = (inb_cmos(CMOS_STATUS_B) & 0x60) | 0x02 | (regs->dl & 0x01);
+ outb_cmos(val8, CMOS_STATUS_B);
+ regs->ah = 0;
+ regs->al = val8; // val last written to Reg B
+ set_cf(regs, 0);
+}
+
+// Read CMOS Date
+static void
+handle_1a04(struct bregs *regs)
+{
+ regs->ah = 0;
+ if (rtc_updating()) {
+ set_cf(regs, 1);
+ return;
+ }
+ regs->cl = inb_cmos(CMOS_RTC_YEAR);
+ regs->dh = inb_cmos(CMOS_RTC_MONTH);
+ regs->dl = inb_cmos(CMOS_RTC_DAY_MONTH);
+ regs->ch = inb_cmos(CMOS_CENTURY);
+ regs->al = regs->ch;
+ set_cf(regs, 0);
+}
+
+// Set CMOS Date
+static void
+handle_1a05(struct bregs *regs)
+{
+ // Using a debugger, I notice the following masking/setting
+ // of bits in Status Register B, by setting Reg B to
+ // a few values and getting its value after INT 1A was called.
+ //
+ // try#1 try#2 try#3 try#4
+ // before 1111 1101 0111 1101 0000 0010 0000 0000
+ // after 0110 1101 0111 1101 0000 0010 0000 0000
+ //
+ // Bit4 in try#1 flipped in hardware (forced low) due to bit7=1
+ // My assumption: RegB = (RegB & 01111111b)
+ if (rtc_updating()) {
+ init_rtc();
+ set_cf(regs, 1);
+ return;
+ }
+ outb_cmos(regs->cl, CMOS_RTC_YEAR);
+ outb_cmos(regs->dh, CMOS_RTC_MONTH);
+ outb_cmos(regs->dl, CMOS_RTC_DAY_MONTH);
+ outb_cmos(regs->ch, CMOS_CENTURY);
+ u8 val8 = inb_cmos(CMOS_STATUS_B) & 0x7f; // clear halt-clock bit
+ outb_cmos(val8, CMOS_STATUS_B);
+ regs->ah = 0;
+ regs->al = val8; // AL = val last written to Reg B
+ set_cf(regs, 0);
+}
+
+// Set Alarm Time in CMOS
+static void
+handle_1a06(struct bregs *regs)
+{
+ // Using a debugger, I notice the following masking/setting
+ // of bits in Status Register B, by setting Reg B to
+ // a few values and getting its value after INT 1A was called.
+ //
+ // try#1 try#2 try#3
+ // before 1101 1111 0101 1111 0000 0000
+ // after 0110 1111 0111 1111 0010 0000
+ //
+ // Bit4 in try#1 flipped in hardware (forced low) due to bit7=1
+ // My assumption: RegB = ((RegB & 01111111b) | 00100000b)
+ u8 val8 = inb_cmos(CMOS_STATUS_B); // Get Status Reg B
+ regs->ax = 0;
+ if (val8 & 0x20) {
+ // Alarm interrupt enabled already
+ set_cf(regs, 1);
+ return;
+ }
+ if (rtc_updating()) {
+ init_rtc();
+ // fall through as if an update were not in progress
+ }
+ outb_cmos(regs->dh, CMOS_RTC_SECONDS_ALARM);
+ outb_cmos(regs->cl, CMOS_RTC_MINUTES_ALARM);
+ outb_cmos(regs->ch, CMOS_RTC_HOURS_ALARM);
+ outb(inb(PORT_PIC2_DATA) & ~PIC2_IRQ8, PORT_PIC2_DATA); // enable IRQ 8
+ // enable Status Reg B alarm bit, clear halt clock bit
+ outb_cmos((val8 & 0x7f) | 0x20, CMOS_STATUS_B);
+ set_cf(regs, 0);
+}
+
+// Turn off Alarm
+static void
+handle_1a07(struct bregs *regs)
+{
+ // Using a debugger, I notice the following masking/setting
+ // of bits in Status Register B, by setting Reg B to
+ // a few values and getting its value after INT 1A was called.
+ //
+ // try#1 try#2 try#3 try#4
+ // before 1111 1101 0111 1101 0010 0000 0010 0010
+ // after 0100 0101 0101 0101 0000 0000 0000 0010
+ //
+ // Bit4 in try#1 flipped in hardware (forced low) due to bit7=1
+ // My assumption: RegB = (RegB & 01010111b)
+ u8 val8 = inb_cmos(CMOS_STATUS_B); // Get Status Reg B
+ // clear clock-halt bit, disable alarm bit
+ outb_cmos(val8 & 0x57, CMOS_STATUS_B); // disable alarm bit
+ regs->ah = 0;
+ regs->al = val8; // val last written to Reg B
+ set_cf(regs, 0);
+}
+
+static void
+handle_1ab1(struct bregs *regs)
+{
+ // XXX - pcibios stuff
+ set_cf(regs, 1);
+}
+
+// Unsupported
+static void
+handle_1aXX(struct bregs *regs)
+{
+ set_cf(regs, 1);
+}
// INT 1Ah Time-of-day Service Entry Point
void VISIBLE
handle_1a(struct bregs *regs)
{
- debug_enter(regs);
- set_cf(regs, 1);
+ //debug_enter(regs);
+ switch (regs->ah) {
+ case 0x00: handle_1a00(regs); break;
+ case 0x01: handle_1a01(regs); break;
+ case 0x02: handle_1a02(regs); break;
+ case 0x03: handle_1a03(regs); break;
+ case 0x04: handle_1a04(regs); break;
+ case 0x05: handle_1a05(regs); break;
+ case 0x06: handle_1a06(regs); break;
+ case 0x07: handle_1a07(regs); break;
+ case 0xb1: handle_1ab1(regs); break;
+ default: handle_1aXX(regs); break;
+ }
+ debug_exit(regs);
}
// User Timer Tick
#include "biosvar.h" // struct bregs
#include "util.h" // debug_enter
-void
-handle_15c2(struct bregs *regs)
+static u8
+enqueue_key(u8 scan_code, u8 ascii_code)
{
+ u16 buffer_start = GET_BDA(kbd_buf_start_offset);
+ u16 buffer_end = GET_BDA(kbd_buf_end_offset);
+
+ u16 buffer_head = GET_BDA(kbd_buf_head);
+ u16 buffer_tail = GET_BDA(kbd_buf_tail);
+
+ u16 temp_tail = buffer_tail;
+ buffer_tail += 2;
+ if (buffer_tail >= buffer_end)
+ buffer_tail = buffer_start;
+
+ if (buffer_tail == buffer_head)
+ return 0;
+
+ SET_FARVAR(0x0000, *(u8*)(temp_tail+0x400+0), ascii_code);
+ SET_FARVAR(0x0000, *(u8*)(temp_tail+0x400+1), scan_code);
+ SET_BDA(kbd_buf_tail, buffer_tail);
+ return 1;
+}
+
+static u8
+dequeue_key(u8 *scan_code, u8 *ascii_code, u8 incr)
+{
+ u16 buffer_head;
+ u16 buffer_tail;
+ for (;;) {
+ buffer_head = GET_BDA(kbd_buf_head);
+ buffer_tail = GET_BDA(kbd_buf_tail);
+
+ if (buffer_head != buffer_tail)
+ break;
+ if (!incr)
+ return 0;
+ }
+
+ *ascii_code = GET_FARVAR(0x0000, *(u8*)(buffer_head+0x400+0));
+ *scan_code = GET_FARVAR(0x0000, *(u8*)(buffer_head+0x400+1));
+
+ if (incr) {
+ u16 buffer_start = GET_BDA(kbd_buf_start_offset);
+ u16 buffer_end = GET_BDA(kbd_buf_end_offset);
+
+ buffer_head += 2;
+ if (buffer_head >= buffer_end)
+ buffer_head = buffer_start;
+ SET_BDA(kbd_buf_head, buffer_head);
+ }
+ return 1;
+}
+
+// read keyboard input
+static void
+handle_1600(struct bregs *regs)
+{
+ u8 scan_code, ascii_code;
+ dequeue_key(&scan_code, &ascii_code, 1);
+ if (scan_code != 0 && ascii_code == 0xF0)
+ ascii_code = 0;
+ else if (ascii_code == 0xE0)
+ ascii_code = 0;
+ regs->ax = (scan_code << 8) | ascii_code;
+}
+
+// check keyboard status
+static void
+handle_1601(struct bregs *regs)
+{
+ u8 scan_code, ascii_code;
+ if (!dequeue_key(&scan_code, &ascii_code, 0)) {
+ regs->flags |= F_ZF;
+ return;
+ }
+ if (scan_code != 0 && ascii_code == 0xF0)
+ ascii_code = 0;
+ else if (ascii_code == 0xE0)
+ ascii_code = 0;
+ regs->ax = (scan_code << 8) | ascii_code;
+ regs->flags &= ~F_ZF;
+}
+
+// get shift flag status
+static void
+handle_1602(struct bregs *regs)
+{
+ regs->al = GET_BDA(kbd_flag0);
+}
+
+// store key-stroke into buffer
+static void
+handle_1605(struct bregs *regs)
+{
+ regs->al = !enqueue_key(regs->ch, regs->cl);
+}
+
+// GET KEYBOARD FUNCTIONALITY
+static void
+handle_1609(struct bregs *regs)
+{
+ // bit Bochs Description
+ // 7 0 reserved
+ // 6 0 INT 16/AH=20h-22h supported (122-key keyboard support)
+ // 5 1 INT 16/AH=10h-12h supported (enhanced keyboard support)
+ // 4 1 INT 16/AH=0Ah supported
+ // 3 0 INT 16/AX=0306h supported
+ // 2 0 INT 16/AX=0305h supported
+ // 1 0 INT 16/AX=0304h supported
+ // 0 0 INT 16/AX=0300h supported
+ //
+ regs->al = 0x30;
+}
+
+// GET KEYBOARD ID
+static void
+handle_160a(struct bregs *regs)
+{
+ outb(0xf2, PORT_KBD_DATA);
+ /* Wait for data */
+ u16 max=0xffff;
+ while ( ((inb(PORT_KBD_STATUS) & 0x01) == 0) && (--max>0) )
+ outb(0x00, PORT_DIAG);
+ if (!max)
+ return;
+ if (inb(PORT_KBD_DATA) != 0xfa) {
+ regs->bx = 0;
+ return;
+ }
+ u16 kbd_code = 0;
+ u8 count = 2;
+ do {
+ max=0xffff;
+ while ( ((inb(PORT_KBD_STATUS) & 0x01) == 0) && (--max>0) )
+ outb(0x00, PORT_DIAG);
+ if (max>0x0) {
+ kbd_code >>= 8;
+ kbd_code |= (inb(PORT_KBD_DATA) << 8);
+ }
+ } while (--count>0);
+ regs->bx = kbd_code;
+}
+
+// read MF-II keyboard input
+static void
+handle_1610(struct bregs *regs)
+{
+ u8 scan_code, ascii_code;
+ dequeue_key(&scan_code, &ascii_code, 1);
+ if (scan_code != 0 && ascii_code == 0xF0)
+ ascii_code = 0;
+ regs->ax = (scan_code << 8) | ascii_code;
+}
+
+// check MF-II keyboard status
+static void
+handle_1611(struct bregs *regs)
+{
+ u8 scan_code, ascii_code;
+ if (!dequeue_key(&scan_code, &ascii_code, 0)) {
+ regs->flags |= F_ZF;
+ return;
+ }
+ if (scan_code != 0 && ascii_code == 0xF0)
+ ascii_code = 0;
+ regs->ax = (scan_code << 8) | ascii_code;
+ regs->flags &= ~F_ZF;
+}
+
+// get extended keyboard status
+static void
+handle_1612(struct bregs *regs)
+{
+ regs->al = GET_BDA(kbd_flag0);
+ regs->ah = (GET_BDA(kbd_flag1) & 0x73) | (GET_BDA(kbd_mode) & 0x0c);
+ //BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX);
+}
+
+static void
+handle_166f(struct bregs *regs)
+{
+ if (regs->al == 0x08)
+ // unsupported, aka normal keyboard
+ regs->ah = 2;
+}
+
+// keyboard capability check called by DOS 5.0+ keyb
+static void
+handle_1692(struct bregs *regs)
+{
+ // function int16 ah=0x10-0x12 supported
+ regs->ah = 0x80;
+}
+
+// 122 keys capability check called by DOS 5.0+ keyb
+static void
+handle_16a2(struct bregs *regs)
+{
+ // don't change AH : function int16 ah=0x20-0x22 NOT supported
+}
+
+static void
+set_leds()
+{
+ u8 shift_flags = GET_BDA(kbd_flag0);
+ u8 led_flags = GET_BDA(kbd_led);
+ if (((shift_flags >> 4) & 0x07) ^ ((led_flags & 0x07) == 0))
+ return;
+
+ outb(0xed, PORT_KBD_DATA);
+ while ((inb(PORT_KBD_STATUS) & 0x01) == 0)
+ outb(0x21, PORT_DIAG);
+ if (inb(PORT_KBD_DATA) == 0xfa) {
+ led_flags &= 0xf8;
+ led_flags |= (shift_flags >> 4) & 0x07;
+ outb(led_flags & 0x07, PORT_KBD_DATA);
+ while ((inb(PORT_KBD_STATUS) & 0x01) == 0)
+ outb(0x21, PORT_DIAG);
+ inb(PORT_KBD_DATA);
+ SET_BDA(kbd_led, led_flags);
+ }
}
// INT 16h Keyboard Service Entry Point
void VISIBLE
handle_16(struct bregs *regs)
{
- //debug_enter(regs);
+// debug_enter(regs);
+
+ set_leds();
+
+ irq_enable();
+
+ switch (regs->ah) {
+ case 0x00: handle_1600(regs); break;
+ case 0x01: handle_1601(regs); break;
+ case 0x02: handle_1602(regs); break;
+ case 0x05: handle_1605(regs); break;
+ case 0x09: handle_1609(regs); break;
+ case 0x0a: handle_160a(regs); break;
+ case 0x10: handle_1610(regs); break;
+ case 0x11: handle_1611(regs); break;
+ case 0x12: handle_1612(regs); break;
+ case 0x92: handle_1692(regs); break;
+ case 0xa2: handle_16a2(regs); break;
+ case 0x6f: handle_166f(regs); break;
+ }
}
-// INT09h : Keyboard Hardware Service Entry Point
-void VISIBLE
-handle_09(struct bregs *regs)
+#define none 0
+#define MAX_SCAN_CODE 0x58
+
+static struct scaninfo {
+ u16 normal;
+ u16 shift;
+ u16 control;
+ u16 alt;
+ u8 lock_flags;
+} scan_to_scanascii[MAX_SCAN_CODE + 1] = {
+ { none, none, none, none, none },
+ { 0x011b, 0x011b, 0x011b, 0x0100, none }, /* escape */
+ { 0x0231, 0x0221, none, 0x7800, none }, /* 1! */
+ { 0x0332, 0x0340, 0x0300, 0x7900, none }, /* 2@ */
+ { 0x0433, 0x0423, none, 0x7a00, none }, /* 3# */
+ { 0x0534, 0x0524, none, 0x7b00, none }, /* 4$ */
+ { 0x0635, 0x0625, none, 0x7c00, none }, /* 5% */
+ { 0x0736, 0x075e, 0x071e, 0x7d00, none }, /* 6^ */
+ { 0x0837, 0x0826, none, 0x7e00, none }, /* 7& */
+ { 0x0938, 0x092a, none, 0x7f00, none }, /* 8* */
+ { 0x0a39, 0x0a28, none, 0x8000, none }, /* 9( */
+ { 0x0b30, 0x0b29, none, 0x8100, none }, /* 0) */
+ { 0x0c2d, 0x0c5f, 0x0c1f, 0x8200, none }, /* -_ */
+ { 0x0d3d, 0x0d2b, none, 0x8300, none }, /* =+ */
+ { 0x0e08, 0x0e08, 0x0e7f, none, none }, /* backspace */
+ { 0x0f09, 0x0f00, none, none, none }, /* tab */
+ { 0x1071, 0x1051, 0x1011, 0x1000, 0x40 }, /* Q */
+ { 0x1177, 0x1157, 0x1117, 0x1100, 0x40 }, /* W */
+ { 0x1265, 0x1245, 0x1205, 0x1200, 0x40 }, /* E */
+ { 0x1372, 0x1352, 0x1312, 0x1300, 0x40 }, /* R */
+ { 0x1474, 0x1454, 0x1414, 0x1400, 0x40 }, /* T */
+ { 0x1579, 0x1559, 0x1519, 0x1500, 0x40 }, /* Y */
+ { 0x1675, 0x1655, 0x1615, 0x1600, 0x40 }, /* U */
+ { 0x1769, 0x1749, 0x1709, 0x1700, 0x40 }, /* I */
+ { 0x186f, 0x184f, 0x180f, 0x1800, 0x40 }, /* O */
+ { 0x1970, 0x1950, 0x1910, 0x1900, 0x40 }, /* P */
+ { 0x1a5b, 0x1a7b, 0x1a1b, none, none }, /* [{ */
+ { 0x1b5d, 0x1b7d, 0x1b1d, none, none }, /* ]} */
+ { 0x1c0d, 0x1c0d, 0x1c0a, none, none }, /* Enter */
+ { none, none, none, none, none }, /* L Ctrl */
+ { 0x1e61, 0x1e41, 0x1e01, 0x1e00, 0x40 }, /* A */
+ { 0x1f73, 0x1f53, 0x1f13, 0x1f00, 0x40 }, /* S */
+ { 0x2064, 0x2044, 0x2004, 0x2000, 0x40 }, /* D */
+ { 0x2166, 0x2146, 0x2106, 0x2100, 0x40 }, /* F */
+ { 0x2267, 0x2247, 0x2207, 0x2200, 0x40 }, /* G */
+ { 0x2368, 0x2348, 0x2308, 0x2300, 0x40 }, /* H */
+ { 0x246a, 0x244a, 0x240a, 0x2400, 0x40 }, /* J */
+ { 0x256b, 0x254b, 0x250b, 0x2500, 0x40 }, /* K */
+ { 0x266c, 0x264c, 0x260c, 0x2600, 0x40 }, /* L */
+ { 0x273b, 0x273a, none, none, none }, /* ;: */
+ { 0x2827, 0x2822, none, none, none }, /* '" */
+ { 0x2960, 0x297e, none, none, none }, /* `~ */
+ { none, none, none, none, none }, /* L shift */
+ { 0x2b5c, 0x2b7c, 0x2b1c, none, none }, /* |\ */
+ { 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00, 0x40 }, /* Z */
+ { 0x2d78, 0x2d58, 0x2d18, 0x2d00, 0x40 }, /* X */
+ { 0x2e63, 0x2e43, 0x2e03, 0x2e00, 0x40 }, /* C */
+ { 0x2f76, 0x2f56, 0x2f16, 0x2f00, 0x40 }, /* V */
+ { 0x3062, 0x3042, 0x3002, 0x3000, 0x40 }, /* B */
+ { 0x316e, 0x314e, 0x310e, 0x3100, 0x40 }, /* N */
+ { 0x326d, 0x324d, 0x320d, 0x3200, 0x40 }, /* M */
+ { 0x332c, 0x333c, none, none, none }, /* ,< */
+ { 0x342e, 0x343e, none, none, none }, /* .> */
+ { 0x352f, 0x353f, none, none, none }, /* /? */
+ { none, none, none, none, none }, /* R Shift */
+ { 0x372a, 0x372a, none, none, none }, /* * */
+ { none, none, none, none, none }, /* L Alt */
+ { 0x3920, 0x3920, 0x3920, 0x3920, none }, /* space */
+ { none, none, none, none, none }, /* caps lock */
+ { 0x3b00, 0x5400, 0x5e00, 0x6800, none }, /* F1 */
+ { 0x3c00, 0x5500, 0x5f00, 0x6900, none }, /* F2 */
+ { 0x3d00, 0x5600, 0x6000, 0x6a00, none }, /* F3 */
+ { 0x3e00, 0x5700, 0x6100, 0x6b00, none }, /* F4 */
+ { 0x3f00, 0x5800, 0x6200, 0x6c00, none }, /* F5 */
+ { 0x4000, 0x5900, 0x6300, 0x6d00, none }, /* F6 */
+ { 0x4100, 0x5a00, 0x6400, 0x6e00, none }, /* F7 */
+ { 0x4200, 0x5b00, 0x6500, 0x6f00, none }, /* F8 */
+ { 0x4300, 0x5c00, 0x6600, 0x7000, none }, /* F9 */
+ { 0x4400, 0x5d00, 0x6700, 0x7100, none }, /* F10 */
+ { none, none, none, none, none }, /* Num Lock */
+ { none, none, none, none, none }, /* Scroll Lock */
+ { 0x4700, 0x4737, 0x7700, none, 0x20 }, /* 7 Home */
+ { 0x4800, 0x4838, none, none, 0x20 }, /* 8 UP */
+ { 0x4900, 0x4939, 0x8400, none, 0x20 }, /* 9 PgUp */
+ { 0x4a2d, 0x4a2d, none, none, none }, /* - */
+ { 0x4b00, 0x4b34, 0x7300, none, 0x20 }, /* 4 Left */
+ { 0x4c00, 0x4c35, none, none, 0x20 }, /* 5 */
+ { 0x4d00, 0x4d36, 0x7400, none, 0x20 }, /* 6 Right */
+ { 0x4e2b, 0x4e2b, none, none, none }, /* + */
+ { 0x4f00, 0x4f31, 0x7500, none, 0x20 }, /* 1 End */
+ { 0x5000, 0x5032, none, none, 0x20 }, /* 2 Down */
+ { 0x5100, 0x5133, 0x7600, none, 0x20 }, /* 3 PgDn */
+ { 0x5200, 0x5230, none, none, 0x20 }, /* 0 Ins */
+ { 0x5300, 0x532e, none, none, 0x20 }, /* Del */
+ { none, none, none, none, none },
+ { none, none, none, none, none },
+ { 0x565c, 0x567c, none, none, none }, /* \| */
+ { 0x5700, 0x5700, none, none, none }, /* F11 */
+ { 0x5800, 0x5800, none, none, none } /* F12 */
+};
+
+static void
+process_key(u8 scancode)
{
- debug_enter(regs);
+ u8 shift_flags = GET_BDA(kbd_flag0);
+ u8 mf2_flags = GET_BDA(kbd_flag1);
+ u8 mf2_state = GET_BDA(kbd_mode);
+
+ switch (scancode) {
+ case 0x00:
+ BX_INFO("KBD: int09 handler: AL=0\n");
+ return;
+
+ case 0x3a: /* Caps Lock press */
+ shift_flags ^= 0x40;
+ SET_BDA(kbd_flag0, shift_flags);
+ mf2_flags |= 0x40;
+ SET_BDA(kbd_flag1, mf2_flags);
+ break;
+ case 0xba: /* Caps Lock release */
+ mf2_flags &= ~0x40;
+ SET_BDA(kbd_flag1, mf2_flags);
+ break;
+
+ case 0x2a: /* L Shift press */
+ shift_flags |= 0x02;
+ SET_BDA(kbd_flag0, shift_flags);
+ break;
+ case 0xaa: /* L Shift release */
+ shift_flags &= ~0x02;
+ SET_BDA(kbd_flag0, shift_flags);
+ break;
+
+ case 0x36: /* R Shift press */
+ shift_flags |= 0x01;
+ SET_BDA(kbd_flag0, shift_flags);
+ break;
+ case 0xb6: /* R Shift release */
+ shift_flags &= ~0x01;
+ SET_BDA(kbd_flag0, shift_flags);
+ break;
+
+ case 0x1d: /* Ctrl press */
+ if ((mf2_state & 0x01) == 0) {
+ shift_flags |= 0x04;
+ SET_BDA(kbd_flag0, shift_flags);
+ if (mf2_state & 0x02) {
+ mf2_state |= 0x04;
+ SET_BDA(kbd_mode, mf2_state);
+ } else {
+ mf2_flags |= 0x01;
+ SET_BDA(kbd_flag1, mf2_flags);
+ }
+ }
+ break;
+ case 0x9d: /* Ctrl release */
+ if ((mf2_state & 0x01) == 0) {
+ shift_flags &= ~0x04;
+ SET_BDA(kbd_flag0, shift_flags);
+ if (mf2_state & 0x02) {
+ mf2_state &= ~0x04;
+ SET_BDA(kbd_mode, mf2_state);
+ } else {
+ mf2_flags &= ~0x01;
+ SET_BDA(kbd_flag1, mf2_flags);
+ }
+ }
+ break;
+
+ case 0x38: /* Alt press */
+ shift_flags |= 0x08;
+ SET_BDA(kbd_flag0, shift_flags);
+ if (mf2_state & 0x02) {
+ mf2_state |= 0x08;
+ SET_BDA(kbd_mode, mf2_state);
+ } else {
+ mf2_flags |= 0x02;
+ SET_BDA(kbd_flag1, mf2_flags);
+ }
+ break;
+ case 0xb8: /* Alt release */
+ shift_flags &= ~0x08;
+ SET_BDA(kbd_flag0, shift_flags);
+ if (mf2_state & 0x02) {
+ mf2_state &= ~0x08;
+ SET_BDA(kbd_mode, mf2_state);
+ } else {
+ mf2_flags &= ~0x02;
+ SET_BDA(kbd_flag1, mf2_flags);
+ }
+ break;
+
+ case 0x45: /* Num Lock press */
+ if ((mf2_state & 0x03) == 0) {
+ mf2_flags |= 0x20;
+ SET_BDA(kbd_flag1, mf2_flags);
+ shift_flags ^= 0x20;
+ SET_BDA(kbd_flag0, shift_flags);
+ }
+ break;
+ case 0xc5: /* Num Lock release */
+ if ((mf2_state & 0x03) == 0) {
+ mf2_flags &= ~0x20;
+ SET_BDA(kbd_flag1, mf2_flags);
+ }
+ break;
+
+ case 0x46: /* Scroll Lock press */
+ mf2_flags |= 0x10;
+ SET_BDA(kbd_flag1, mf2_flags);
+ shift_flags ^= 0x10;
+ SET_BDA(kbd_flag0, shift_flags);
+ break;
+ case 0xc6: /* Scroll Lock release */
+ mf2_flags &= ~0x10;
+ SET_BDA(kbd_flag1, mf2_flags);
+ break;
+
+ case 0xe0:
+ // Extended key
+ SETBITS_BDA(kbd_mode, 0x02);
+ return;
+ case 0xe1:
+ // Pause key
+ SETBITS_BDA(kbd_mode, 0x01);
+ return;
+
+ default:
+ if (scancode & 0x80) {
+ break; /* toss key releases ... */
+ }
+ if (scancode > MAX_SCAN_CODE) {
+ BX_INFO("KBD: int09h_handler(): unknown scancode read: 0x%02x!\n", scancode);
+ return;
+ }
+ u8 asciicode;
+ struct scaninfo *info = &scan_to_scanascii[scancode];
+ if (shift_flags & 0x08) { /* ALT */
+ asciicode = GET_VAR(CS, info->alt);
+ scancode = GET_VAR(CS, info->alt) >> 8;
+ } else if (shift_flags & 0x04) { /* CONTROL */
+ asciicode = GET_VAR(CS, info->control);
+ scancode = GET_VAR(CS, info->control) >> 8;
+ } else if (((mf2_state & 0x02) > 0) && ((scancode >= 0x47) && (scancode <= 0x53))) {
+ /* extended keys handling */
+ asciicode = 0xe0;
+ scancode = GET_VAR(CS, info->normal) >> 8;
+ } else if (shift_flags & 0x03) { /* LSHIFT + RSHIFT */
+ /* check if lock state should be ignored
+ * because a SHIFT key are pressed */
+
+ if (shift_flags & GET_VAR(CS, info->lock_flags)) {
+ asciicode = GET_VAR(CS, info->normal);
+ scancode = GET_VAR(CS, info->normal) >> 8;
+ } else {
+ asciicode = GET_VAR(CS, info->shift);
+ scancode = GET_VAR(CS, info->shift) >> 8;
+ }
+ } else {
+ /* check if lock is on */
+ if (shift_flags & GET_VAR(CS, info->lock_flags)) {
+ asciicode = GET_VAR(CS, info->shift);
+ scancode = GET_VAR(CS, info->shift) >> 8;
+ } else {
+ asciicode = GET_VAR(CS, info->normal);
+ scancode = GET_VAR(CS, info->normal) >> 8;
+ }
+ }
+ if (scancode==0 && asciicode==0) {
+ BX_INFO("KBD: int09h_handler(): scancode & asciicode are zero?\n");
+ }
+ enqueue_key(scancode, asciicode);
+ break;
+ }
+ if ((scancode & 0x7f) != 0x1d) {
+ mf2_state &= ~0x01;
+ }
+ mf2_state &= ~0x02;
+ SET_BDA(kbd_mode, mf2_state);
}
-// INT74h : PS/2 mouse hardware interrupt
+// INT09h : Keyboard Hardware Service Entry Point
void VISIBLE
-handle_74(struct bregs *regs)
+handle_09(struct bregs *regs)
{
- debug_enter(regs);
+// debug_enter(regs);
+
+ outb(0x0b, PORT_PIC1);
+ if ((inb(PORT_PIC1) & 0x02) == 0)
+ return;
+
+ // disable keyboard
+ outb(0xad, PORT_KBD_STATUS);
+
+ // read key from keyboard controller
+ u8 key = inb(PORT_KBD_DATA);
+ irq_enable();
+#if 0
+ if (CONFIG_KBD_CALL_INT15_4F) {
+ // XXX
+ }
+#endif
+ process_key(key);
+
+ irq_disable();
+ eoi_master_pic();
+
+ // enable keyboard
+ outb(0xae, PORT_KBD_STATUS);
}
projects / seabios.git / commitdiff