mirror of
https://github.com/retro100/dosbox-wii.git
synced 2024-11-16 23:29:15 +01:00
372 lines
12 KiB
C++
372 lines
12 KiB
C++
/*
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* Copyright (C) 2002-2003 The DOSBox Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "dosbox.h"
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#include "callback.h"
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#include "mem.h"
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#include "bios.h"
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#include "keyboard.h"
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#include "regs.h"
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#include "inout.h"
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static Bitu call_int16,call_irq1;
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/* Nice table from BOCHS i should feel bad for ripping this */
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#define none 0
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#define MAX_SCAN_CODE 0x53
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static struct {
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Bit16u normal;
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Bit16u shift;
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Bit16u control;
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Bit16u alt;
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} scan_to_scanascii[MAX_SCAN_CODE + 1] = {
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{ none, none, none, none },
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{ 0x011b, 0x011b, 0x011b, 0x0100 }, /* escape */
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{ 0x0231, 0x0221, none, 0x7800 }, /* 1! */
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{ 0x0332, 0x0340, 0x0300, 0x7900 }, /* 2@ */
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{ 0x0433, 0x0423, none, 0x7a00 }, /* 3# */
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{ 0x0534, 0x0524, none, 0x7b00 }, /* 4$ */
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{ 0x0635, 0x0625, none, 0x7c00 }, /* 5% */
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{ 0x0736, 0x075e, 0x071e, 0x7d00 }, /* 6^ */
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{ 0x0837, 0x0826, none, 0x7e00 }, /* 7& */
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{ 0x0938, 0x092a, none, 0x7f00 }, /* 8* */
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{ 0x0a39, 0x0a28, none, 0x8000 }, /* 9( */
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{ 0x0b30, 0x0b29, none, 0x8100 }, /* 0) */
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{ 0x0c2d, 0x0c5f, 0x0c1f, 0x8200 }, /* -_ */
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{ 0x0d3d, 0x0d2b, none, 0x8300 }, /* =+ */
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{ 0x0e08, 0x0e08, 0x0e7f, none }, /* backspace */
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{ 0x0f09, 0x0f00, none, none }, /* tab */
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{ 0x1071, 0x1051, 0x1011, 0x1000 }, /* Q */
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{ 0x1177, 0x1157, 0x1117, 0x1100 }, /* W */
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{ 0x1265, 0x1245, 0x1205, 0x1200 }, /* E */
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{ 0x1372, 0x1352, 0x1312, 0x1300 }, /* R */
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{ 0x1474, 0x1454, 0x1414, 0x1400 }, /* T */
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{ 0x1579, 0x1559, 0x1519, 0x1500 }, /* Y */
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{ 0x1675, 0x1655, 0x1615, 0x1600 }, /* U */
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{ 0x1769, 0x1749, 0x1709, 0x1700 }, /* I */
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{ 0x186f, 0x184f, 0x180f, 0x1800 }, /* O */
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{ 0x1970, 0x1950, 0x1910, 0x1900 }, /* P */
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{ 0x1a5b, 0x1a7b, 0x1a1b, none }, /* [{ */
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{ 0x1b5d, 0x1b7d, 0x1b1d, none }, /* ]} */
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{ 0x1c0d, 0x1c0d, 0x1c0a, none }, /* Enter */
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{ none, none, none, none }, /* L Ctrl */
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{ 0x1e61, 0x1e41, 0x1e01, 0x1e00 }, /* A */
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{ 0x1f73, 0x1f53, 0x1f13, 0x1f00 }, /* S */
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{ 0x2064, 0x2044, 0x2004, 0x2000 }, /* D */
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{ 0x2166, 0x2146, 0x2106, 0x2100 }, /* F */
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{ 0x2267, 0x2247, 0x2207, 0x2200 }, /* G */
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{ 0x2368, 0x2348, 0x2308, 0x2300 }, /* H */
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{ 0x246a, 0x244a, 0x240a, 0x2400 }, /* J */
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{ 0x256b, 0x254b, 0x250b, 0x2500 }, /* K */
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{ 0x266c, 0x264c, 0x260c, 0x2600 }, /* L */
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{ 0x273b, 0x273a, none, none }, /* ;: */
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{ 0x2827, 0x2822, none, none }, /* '" */
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{ 0x2960, 0x297e, none, none }, /* `~ */
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{ none, none, none, none }, /* L shift */
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{ 0x2b5c, 0x2b7c, 0x2b1c, none }, /* |\ */
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{ 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00 }, /* Z */
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{ 0x2d78, 0x2d58, 0x2d18, 0x2d00 }, /* X */
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{ 0x2e63, 0x2e43, 0x2e03, 0x2e00 }, /* C */
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{ 0x2f76, 0x2f56, 0x2f16, 0x2f00 }, /* V */
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{ 0x3062, 0x3042, 0x3002, 0x3000 }, /* B */
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{ 0x316e, 0x314e, 0x310e, 0x3100 }, /* N */
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{ 0x326d, 0x324d, 0x320d, 0x3200 }, /* M */
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{ 0x332c, 0x333c, none, none }, /* ,< */
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{ 0x342e, 0x343e, none, none }, /* .> */
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{ 0x352f, 0x353f, none, none }, /* /? */
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{ none, none, none, none }, /* R Shift */
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{ 0x372a, 0x372a, none, none }, /* * */
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{ none, none, none, none }, /* L Alt */
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{ 0x3920, 0x3920, 0x3920, 0x3920 }, /* space */
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{ none, none, none, none }, /* caps lock */
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{ 0x3b00, 0x5400, 0x5e00, 0x6800 }, /* F1 */
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{ 0x3c00, 0x5500, 0x5f00, 0x6900 }, /* F2 */
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{ 0x3d00, 0x5600, 0x6000, 0x6a00 }, /* F3 */
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{ 0x3e00, 0x5700, 0x6100, 0x6b00 }, /* F4 */
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{ 0x3f00, 0x5800, 0x6200, 0x6c00 }, /* F5 */
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{ 0x4000, 0x5900, 0x6300, 0x6d00 }, /* F6 */
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{ 0x4100, 0x5a00, 0x6400, 0x6e00 }, /* F7 */
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{ 0x4200, 0x5b00, 0x6500, 0x6f00 }, /* F8 */
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{ 0x4300, 0x5c00, 0x6600, 0x7000 }, /* F9 */
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{ 0x4400, 0x5d00, 0x6700, 0x7100 }, /* F10 */
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{ none, none, none, none }, /* Num Lock */
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{ none, none, none, none }, /* Scroll Lock */
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{ 0x4700, 0x4737, 0x7700, none }, /* 7 Home */
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{ 0x4800, 0x4838, none, none }, /* 8 UP */
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{ 0x4900, 0x4939, 0x8400, none }, /* 9 PgUp */
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{ 0x4a2d, 0x4a2d, none, none }, /* - */
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{ 0x4b00, 0x4b34, 0x7300, none }, /* 4 Left */
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{ 0x4c00, 0x4c35, none, none }, /* 5 */
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{ 0x4d00, 0x4d36, 0x7400, none }, /* 6 Right */
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{ 0x4e2b, 0x4e2b, none, none }, /* + */
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{ 0x4f00, 0x4f31, 0x7500, none }, /* 1 End */
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{ 0x5000, 0x5032, none, none }, /* 2 Down */
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{ 0x5100, 0x5133, 0x7600, none }, /* 3 PgDn */
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{ 0x5200, 0x5230, none, none }, /* 0 Ins */
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{ 0x5300, 0x532e, none, none } /* Del */
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};
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static void add_key(Bit16u code) {
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Bit16u start,end,head,tail,ttail;
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start=mem_readw(BIOS_KEYBOARD_BUFFER_START);
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end =mem_readw(BIOS_KEYBOARD_BUFFER_END);
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head =mem_readw(BIOS_KEYBOARD_BUFFER_HEAD);
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tail =mem_readw(BIOS_KEYBOARD_BUFFER_TAIL);
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ttail=tail+2;
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if (ttail>=end) {
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ttail=start;
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}
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/* Check for buffer Full */
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//TODO Maybe beeeeeeep or something although that should happend when internal buffer is full
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if (ttail==head) return;
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real_writew(0x40,tail,code);
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mem_writew(BIOS_KEYBOARD_BUFFER_TAIL,ttail);
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}
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static Bit16u get_key(void) {
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Bit16u start,end,head,tail,thead;
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start=mem_readw(BIOS_KEYBOARD_BUFFER_START);
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end =mem_readw(BIOS_KEYBOARD_BUFFER_END);
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head =mem_readw(BIOS_KEYBOARD_BUFFER_HEAD);
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tail =mem_readw(BIOS_KEYBOARD_BUFFER_TAIL);
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if (head==tail) return 0;
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thead=head+2;
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if (thead>=end) thead=start;
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mem_writew(BIOS_KEYBOARD_BUFFER_HEAD,thead);
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return real_readw(0x40,head);
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}
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static Bit16u check_key(void) {
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Bit16u head,tail;
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head =mem_readw(BIOS_KEYBOARD_BUFFER_HEAD);
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tail =mem_readw(BIOS_KEYBOARD_BUFFER_TAIL);
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if (head==tail) return 0;
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return real_readw(0x40,head);
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}
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/* Flag Byte 1
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bit 7 =1 INSert active
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bit 6 =1 Caps Lock active
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bit 5 =1 Num Lock active
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bit 4 =1 Scroll Lock active
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bit 3 =1 either Alt pressed
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bit 2 =1 either Ctrl pressed
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bit 1 =1 Left Shift pressed
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bit 0 =1 Right Shift pressed
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*/
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/* Flag Byte 2
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bit 7 =1 INSert pressed
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bit 6 =1 Caps Lock pressed
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bit 5 =1 Num Lock pressed
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bit 4 =1 Scroll Lock pressed
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bit 3 =1 Pause state active
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bit 2 =1 Sys Req pressed
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bit 1 =1 Left Alt pressed
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bit 0 =1 Left Ctrl pressed
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*/
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/*
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Keyboard status byte 3
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bit 7 =1 read-ID in progress
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bit 6 =1 last code read was first of two ID codes
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bit 5 =1 force Num Lock if read-ID and enhanced keyboard
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bit 4 =1 enhanced keyboard installed
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bit 3 =1 Right Alt pressed
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bit 2 =1 Right Ctrl pressed
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bit 1 =1 last code read was E0h
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bit 0 =1 last code read was E1h
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*/
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static Bitu IRQ1_Handler(void) {
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/* Read the code */
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Bitu scancode,ascii,mod;
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#if 0
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scancode=IO_Read(0x60);
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ascii=0;
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mod=0;
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#else
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KEYBOARD_ReadKey(scancode,ascii,mod);
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// LOG(0,"Got code %X ascii %C mod %X",scancode,ascii,mod);
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#endif
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//TODO maybe implement the int 0x15 ah=4f scancode lookup hook
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Bit8u flags1=mem_readb(BIOS_KEYBOARD_FLAGS1);
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Bit8u flags2=mem_readb(BIOS_KEYBOARD_FLAGS2);
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Bit8u flags3=mem_readb(BIOS_KEYBOARD_FLAGS3);
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switch (scancode) {
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/* First the hard ones */
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case 0xe0: /* Extended key */
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flags3|=2;
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break;
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case 29: /* Ctrl Pressed */
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flags1|=4;
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if (flags3 & 2) flags3|=4;
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else flags2|=1;
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break;
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case 157: /* Ctrl Released */
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flags1&=~4;
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if (flags3 & 2) flags3&=~4;
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else flags2&=~1;
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break;
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case 42: /* Left Shift Pressed */
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flags1|=2;
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break;
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case 170: /* Left Shift Released */
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flags1&=~2;
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break;
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case 54: /* Right Shift Pressed */
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flags1|=1;
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break;
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case 182: /* Right Shift Released */
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flags1&=~1;
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break;
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case 56: /* Alt Pressed */
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flags1|=8;
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if (flags3 & 2) flags3|=8;
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else flags2|=2;
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break;
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case 184: /* Alt Released */
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flags1&=~8;
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if (flags3 & 2) flags3&=~8;
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else flags2&=~2;
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break;
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#if 0
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case 58:p_capslock=true;break; /* Caps Lock */
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case 186:p_capslock=false;break;
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case 69:p_numlock=true;break; /* Num Lock */
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case 197:p_numlock=false;break;
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case 70:p_scrolllock=true;break; /* Scroll Lock */
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case 198:p_scrolllock=false;break;
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case 82:p_insert=true;break; /* Insert */
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case 210:p_insert=false;a_insert=!a_insert;break;
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#endif
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default: /* Normal Key */
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Bit16u asciiscan;
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/* Now Handle the releasing of keys and see if they match up for a code */
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flags3&=~2; //Reset 0xE0 Flag
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/* Handle the actual scancode */
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if (scancode & 0x80) goto irq1_end;
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if (scancode > MAX_SCAN_CODE) goto irq1_end;
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if (mod & KBD_MOD_ALT) { /* Alt is being pressed */
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asciiscan=scan_to_scanascii[scancode].alt;
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} else if (ascii) {
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asciiscan=(scancode << 8) | ascii;
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} else if (mod & KBD_MOD_CTRL) { /* Ctrl is being pressed */
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asciiscan=scan_to_scanascii[scancode].control;
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} else if (mod & KBD_MOD_SHIFT) { /* Either shift is being pressed */
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asciiscan=scan_to_scanascii[scancode].shift;
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} else {
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asciiscan=scan_to_scanascii[scancode].normal;
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}
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add_key(asciiscan);
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};
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irq1_end:
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mem_writeb(BIOS_KEYBOARD_FLAGS1,flags1);
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mem_writeb(BIOS_KEYBOARD_FLAGS2,flags2);
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mem_writeb(BIOS_KEYBOARD_FLAGS3,flags3);
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IO_Write(0x20,0x20);
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#if 0
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/* Signal the keyboard for next code */
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Bit8u old61=IO_Read(0x61);
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IO_Write(0x61,old61 | 128);
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IO_Write(0x61,old61 & 127);
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#endif
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return CBRET_NONE;
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}
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static Bitu INT16_Handler(void) {
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Bit16u temp;
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switch (reg_ah) {
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case 0x00: /* GET KEYSTROKE */
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case 0x10:
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{
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//TODO find a more elegant way to do this
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do {
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temp=get_key();
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if (temp==0) { CALLBACK_Idle();};
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} while (temp==0);
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reg_ax=temp;
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break;
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}
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case 0x01: /* CHECK FOR KEYSTROKE */
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case 0x11:
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temp=check_key();
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if (temp==0) {
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CALLBACK_SZF(true);
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} else {
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CALLBACK_SZF(false);
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reg_ax=temp;
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}
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break;
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case 0x02: /* GET SHIFT FlAGS */
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reg_al=mem_readb(BIOS_KEYBOARD_FLAGS1);
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break;
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case 0x03: /* SET TYPEMATIC RATE AND DELAY */
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LOG(LOG_BIOS,LOG_ERROR)("INT16:Unhandled Typematic Rate Call %2X",reg_al);
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break;
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case 0x05: /* STORE KEYSTROKE IN KEYBOARD BUFFER */
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//TODO make add_key bool :)
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add_key(reg_ax);
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reg_al=0;
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break;
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case 0x12: /* GET EXTENDED SHIFT STATES */
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reg_al=mem_readb(BIOS_KEYBOARD_FLAGS1);
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reg_ah=mem_readb(BIOS_KEYBOARD_FLAGS2);
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break;
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case 0x55:
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/* Weird call used by some dos apps */
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LOG(LOG_BIOS,LOG_NORMAL)("INT16:55:Word TSR compatible call");
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break;
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default:
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LOG(LOG_BIOS,LOG_ERROR)("INT16:Unhandled call %02X",reg_ah);
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break;
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};
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return CBRET_NONE;
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}
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static void InitBiosSegment(void) {
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/* Setup the variables for keyboard in the bios data segment */
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mem_writew(BIOS_KEYBOARD_BUFFER_START,0x1e);
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mem_writew(BIOS_KEYBOARD_BUFFER_END,0x3e);
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mem_writew(BIOS_KEYBOARD_BUFFER_HEAD,0x1e);
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mem_writew(BIOS_KEYBOARD_BUFFER_TAIL,0x1e);
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mem_writeb(BIOS_KEYBOARD_FLAGS1,0);
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mem_writeb(BIOS_KEYBOARD_FLAGS2,0);
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mem_writeb(BIOS_KEYBOARD_FLAGS3,16); /* Enhanced keyboard installed */
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}
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void BIOS_SetupKeyboard(void) {
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/* Init the variables */
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InitBiosSegment();
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/* Allocate a callback for int 0x16 and for standard IRQ 1 handler */
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call_int16=CALLBACK_Allocate();
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call_irq1=CALLBACK_Allocate();
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CALLBACK_Setup(call_int16,&INT16_Handler,CB_IRET_STI);
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RealSetVec(0x16,CALLBACK_RealPointer(call_int16));
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CALLBACK_Setup(call_irq1,&IRQ1_Handler,CB_IRET);
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RealSetVec(0x9,CALLBACK_RealPointer(call_irq1));
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}
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