Version 0.1.1rel-0.1.1

1 files changed, 544 insertions, 10 deletions

diff --git a/src/kbd.c b/src/kbd.c
index bcc1a59..4115aa7 100644
--- a/src/kbd.c
+++ b/src/kbd.c
@@ -8,28 +8,562 @@
 #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);
 }