/**********************************************************************
* INT10_HandleVESA
*
* Handler for VESA functions (int10 function 0x4f).
*/
static void INT10_HandleVESA( CONTEXT *context )
{
BIOSDATA *data = DOSVM_BiosData();
switch(AL_reg(context)) {
case 0x00: /* RETURN CONTROLLER INFORMATION */
TRACE( "VESA RETURN CONTROLLER INFORMATION\n" );
{
BYTE *ptr = CTX_SEG_OFF_TO_LIN(context,
context->SegEs,
context->Edi);
INT10_FillControllerInformation( ptr );
SET_AL( context, 0x4f );
SET_AH( context, 0x00 ); /* 0x00 = successful 0x01 = failed */
}
break;
case 0x01: /* RETURN MODE INFORMATION */
TRACE( "VESA RETURN MODE INFORMATION %04x\n", CX_reg(context) );
{
struct _ModeInfoBlock *ptr = CTX_SEG_OFF_TO_LIN(context,
context->SegEs,
context->Edi);
SET_AL( context, 0x4f );
if (INT10_FillModeInformation( ptr, CX_reg(context) ))
SET_AH( context, 0x00 ); /* status: success */
else
SET_AH( context, 0x01 ); /* status: failed */
}
break;
case 0x02: /* SET SuperVGA VIDEO MODE */
TRACE( "Set VESA video mode %04x\n", BX_reg(context) );
SET_AL( context, 0x4f ); /* function supported */
if (INT10_SetVideoMode( data, BX_reg(context) ))
SET_AH( context, 0x00 ); /* success */
else
SET_AH( context, 0x01 ); /* failed */
break;
case 0x03: /* VESA SuperVGA BIOS - GET CURRENT VIDEO MODE */
SET_AL( context, 0x4f );
SET_AH( context, 0x00 );
SET_BX( context, INT10_GetHeap()->VesaCurrentMode );
break;
case 0x04: /* VESA SuperVGA BIOS - SAVE/RESTORE SuperVGA VIDEO STATE */
ERR("VESA SAVE/RESTORE Video State - Not Implemented\n");
/* AL_reg(context) = 0x4f; = supported so not set since not implemented */
/* maybe we should do this instead ? */
/* AH_reg(context = 0x01; not implemented so just fail */
break;
case 0x05: /* VESA SuperVGA BIOS - CPU VIDEO MEMORY CONTROL */
/*
* This subfunction supports only Window A (BL_reg == 0) and
* it assumes that window granularity is 64k.
*/
switch(BH_reg(context)) {
case 0x00: /* select video memory window */
SET_AL( context, 0x4f ); /* function supported */
if(BL_reg(context) == 0) {
VGA_SetWindowStart(DX_reg(context) * 64 * 1024);
SET_AH( context, 0x00 ); /* status: successful */
} else
SET_AH( context, 0x01 ); /* status: failed */
break;
case 0x01: /* get video memory window */
SET_AL( context, 0x4f ); /* function supported */
if(BL_reg(context) == 0) {
SET_DX( context, VGA_GetWindowStart() / 64 / 1024 );
SET_AH( context, 0x00 ); /* status: successful */
} else
SET_AH( context, 0x01 ); /* status: failed */
break;
default:
INT_BARF( context, 0x10 );
}
break;
case 0x06: /* VESA GET/SET LOGICAL SCAN LINE LENGTH */
ERR("VESA GET/SET LOGICAL SCAN LINE LENGTH - Not Implemented\n");
/* AL_reg(context) = 0x4f; = supported so not set since not implemented */
/* maybe we should do this instead ? */
/* AH_reg(context = 0x001; not implemented so just fail */
break;
case 0x07: /* GET/SET DISPLAY START */
ERR("VESA GET/SET DISPLAY START - Not Implemented\n");
/* AL_reg(context) = 0x4f; = supported so not set since not implemented */
/* maybe we should do this instead ? */
/* AH_reg(context = 0x001; not implemented so just fail */
break;
case 0x08: /* GET/SET DAC PALETTE CONTROL */
ERR("VESA GET/SET DAC PALETTE CONTROL- Not Implemented\n");
/* AL_reg(context) = 0x4f; = supported so not set since not implemented */
/* maybe we should do this instead ? */
/* AH_reg(context = 0x001; not implemented so just fail */
break;
case 0x09: /* SET PALETTE ENTRIES */
FIXME("VESA Set palette entries - not implemented\n");
break;
case 0x0a: /* GET PROTECTED-MODE CODE */
FIXME("VESA Get protected-mode code - not implemented\n");
break;
case 0x10: /* Display Power Management Extensions */
FIXME("VESA Display Power Management Extensions - not implemented\n");
break;
case 0xef: /* get video mode for hercules-compatibles */
/* There's no reason to really support this */
/* is there?....................(A.C.) */
TRACE("Just report the video not hercules compatible\n");
SET_DX( context, 0xffff );
break;
case 0xff: /* Turn VESA ON/OFF */
/* I don't know what to do */
break;
default:
FIXME("VESA Function (0x%x) - Not Supported\n", AH_reg(context));
break;
}
}
BYTE VGA_ioport_in( WORD port )
{
BYTE ret;
switch (port) {
case 0x3c1:
FIXME("Unsupported index, register 0x3c0: 0x%02x\n",
vga_index_3c0);
return 0xff;
case 0x3c5:
switch(vga_index_3c4) {
case 0x04: /* Sequencer: Memory Mode Register */
return (VGA_GetWindowStart() == -1) ? 0xf7 : 0xff;
default:
FIXME("Unsupported index, register 0x3c4: 0x%02x\n",
vga_index_3c4);
return 0xff;
}
case 0x3cf:
FIXME("Unsupported index, register 0x3ce: 0x%02x\n",
vga_index_3ce);
return 0xff;
case 0x3d5:
FIXME("Unsupported index, register 0x3d4: 0x%02x\n",
vga_index_3d4);
return 0xff;
case 0x3da:
/*
* Read from this register resets register 0x3c0 address flip-flop.
*/
vga_address_3c0 = TRUE;
/*
* Read from this register returns following bits:
* xxxx1xxx = Vertical retrace in progress if set.
* xxxxx1xx = Light pen switched on.
* xxxxxx1x = Light pen trigger set.
* xxxxxxx1 = Either vertical or horizontal retrace
* in progress if set.
*/
ret = 0;
if (vga_retrace_vertical)
ret |= 9;
if (vga_retrace_horizontal)
ret |= 3;
/*
* If VGA mode has been set, vertical retrace is
* turned on once a frame and cleared after each read.
* This might cause applications that synchronize with
* vertical retrace to actually skip one frame but that
* is probably not a problem.
*
* If no VGA mode has been set, vertical retrace is faked
* by toggling the value after every read.
*/
if (VGA_IsTimerRunning())
vga_retrace_vertical = FALSE;
else
vga_retrace_vertical = !vga_retrace_vertical;
/*
* Toggle horizontal retrace.
*/
vga_retrace_horizontal = !vga_retrace_horizontal;
break;
default:
ret=0xff;
FIXME("Unsupported VGA register: 0x%04x\n", port);
}
return ret;
}
