Sweden-Number/msdos/int16.c

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/*
* DOS interrupt 16h handler
*/
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "config.h"
#include "module.h"
#include "dosexe.h"
#include "wincon.h"
#include "debugtools.h"
#include "windef.h"
#include "wingdi.h"
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#include "winuser.h"
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#include "miscemu.h"
DEFAULT_DEBUG_CHANNEL(int16)
/**********************************************************************
* INT_Int16Handler
*
* Handler for int 16h (keyboard)
*
* NOTE:
*
* KEYB.COM (DOS >3.2) adds functions to this interrupt, they are
* not currently listed here.
*/
void WINAPI INT_Int16Handler( CONTEXT86 *context )
{
switch AH_reg(context) {
case 0x00: /* Get Keystroke */
/* Returns: AH = Scan code
AL = ASCII character */
TRACE("Get Keystroke\n");
INT_Int16ReadChar(&AL_reg(context), &AH_reg(context), FALSE);
break;
case 0x01: /* Check for Keystroke */
/* Returns: ZF set if no keystroke */
/* AH = Scan code */
/* AL = ASCII character */
TRACE("Check for Keystroke\n");
if (!INT_Int16ReadChar(&AL_reg(context), &AH_reg(context), TRUE))
{
SET_ZFLAG(context);
}
else
{
RESET_ZFLAG(context);
}
break;
case 0x02: /* Get Shift Flags */
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AL_reg(context) = 0;
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#if 0 /* FIXME: cannot call USER functions here */
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if (GetAsyncKeyState(VK_RSHIFT))
AL_reg(context) |= 0x01;
if (GetAsyncKeyState(VK_LSHIFT))
AL_reg(context) |= 0x02;
if (GetAsyncKeyState(VK_LCONTROL) || GetAsyncKeyState(VK_RCONTROL))
AL_reg(context) |= 0x04;
if (GetAsyncKeyState(VK_LMENU) || GetAsyncKeyState(VK_RMENU))
AL_reg(context) |= 0x08;
if (GetAsyncKeyState(VK_SCROLL))
AL_reg(context) |= 0x10;
if (GetAsyncKeyState(VK_NUMLOCK))
AL_reg(context) |= 0x20;
if (GetAsyncKeyState(VK_CAPITAL))
AL_reg(context) |= 0x40;
if (GetAsyncKeyState(VK_INSERT))
AL_reg(context) |= 0x80;
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#endif
TRACE("Get Shift Flags: returning 0x%02x\n", AL_reg(context));
break;
case 0x03: /* Set Typematic Rate and Delay */
FIXME("Set Typematic Rate and Delay - Not Supported\n");
break;
case 0x09: /* Get Keyboard Functionality */
FIXME("Get Keyboard Functionality - Not Supported\n");
/* As a temporary measure, say that "nothing" is supported... */
AL_reg(context) = 0;
break;
case 0x0a: /* Get Keyboard ID */
FIXME("Get Keyboard ID - Not Supported\n");
break;
case 0x10: /* Get Enhanced Keystroke */
TRACE("Get Enhanced Keystroke - Partially supported\n");
/* Returns: AH = Scan code
AL = ASCII character */
INT_Int16ReadChar(&AL_reg(context), &AH_reg(context), FALSE);
break;
case 0x11: /* Check for Enhanced Keystroke */
/* Returns: ZF set if no keystroke */
/* AH = Scan code */
/* AL = ASCII character */
TRACE("Check for Enhanced Keystroke - Partially supported\n");
if (!INT_Int16ReadChar(&AL_reg(context), &AH_reg(context), TRUE))
{
SET_ZFLAG(context);
}
else
{
RESET_ZFLAG(context);
}
break;
case 0x12: /* Get Extended Shift States */
FIXME("Get Extended Shift States - Not Supported\n");
break;
default:
FIXME("Unknown INT 16 function - 0x%x\n", AH_reg(context));
break;
}
}
int WINAPI INT_Int16ReadChar(BYTE*ascii,BYTE*scan,BOOL peek)
{
BIOSDATA *data = DOSMEM_BiosData();
WORD CurOfs = data->NextKbdCharPtr;
/* check if there's data in buffer */
if (peek) {
if (CurOfs == data->FirstKbdCharPtr)
return 0;
} else {
while (CurOfs == data->FirstKbdCharPtr) {
/* no input available yet, so wait... */
DOSVM_Wait( -1, 0 );
}
}
/* read from keyboard queue */
TRACE("(%p,%p,%d) -> %02x %02x\n",ascii,scan,peek,((BYTE*)data)[CurOfs],((BYTE*)data)[CurOfs+1]);
if (ascii) *ascii = ((BYTE*)data)[CurOfs];
if (scan) *scan = ((BYTE*)data)[CurOfs+1];
if (!peek) {
CurOfs += 2;
if (CurOfs >= data->KbdBufferEnd) CurOfs = data->KbdBufferStart;
data->NextKbdCharPtr = CurOfs;
}
return 1;
}
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int WINAPI INT_Int16AddChar(BYTE ascii,BYTE scan)
{
BIOSDATA *data = DOSMEM_BiosData();
WORD CurOfs = data->FirstKbdCharPtr;
WORD NextOfs = CurOfs + 2;
TRACE("(%02x,%02x)\n",ascii,scan);
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if (NextOfs >= data->KbdBufferEnd) NextOfs = data->KbdBufferStart;
/* check if buffer is full */
if (NextOfs == data->NextKbdCharPtr) return 0;
/* okay, insert character in ring buffer */
((BYTE*)data)[CurOfs] = ascii;
((BYTE*)data)[CurOfs+1] = scan;
data->FirstKbdCharPtr = NextOfs;
return 1;
}