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Fixed VGA line compare register masking, makes Windows 98 logo to display correctly [Angelo Salese]

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This commit is contained in:
Angelo Salese 2011-12-24 15:07:48 +00:00
parent 1889287167
commit a4aeb66cf3
2 changed files with 5 additions and 5 deletions
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8
src/emu/video/pc_vga.c
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@ -1136,9 +1136,9 @@ static void vga_vh_vga(bitmap_t *bitmap)
{ {
for (addr = VGA_START_ADDRESS, line=0; line<LINES; line++, addr+=VGA_LINE_LENGTH, curr_addr+=VGA_LINE_LENGTH) for (addr = VGA_START_ADDRESS, line=0; line<LINES; line++, addr+=VGA_LINE_LENGTH, curr_addr+=VGA_LINE_LENGTH)
{ {
if(line < (vga.line_compare & 0xff)) if(line < (vga.line_compare & 0x3ff))
curr_addr = addr; curr_addr = addr;
if(line == (vga.line_compare & 0xff)) if(line == (vga.line_compare & 0x3ff))
curr_addr = 0; curr_addr = 0;
bitmapline = BITMAP_ADDR16(bitmap, line, 0); bitmapline = BITMAP_ADDR16(bitmap, line, 0);
addr %= vga.svga_intf.vram_size; addr %= vga.svga_intf.vram_size;
@ -1161,9 +1161,9 @@ static void vga_vh_vga(bitmap_t *bitmap)
{ {
for (addr = VGA_START_ADDRESS, line=0; line<LINES; line++, addr+=VGA_LINE_LENGTH/4, curr_addr+=VGA_LINE_LENGTH/4) for (addr = VGA_START_ADDRESS, line=0; line<LINES; line++, addr+=VGA_LINE_LENGTH/4, curr_addr+=VGA_LINE_LENGTH/4)
{ {
if(line < (vga.line_compare & 0xff)) if(line < (vga.line_compare & 0x3ff))
curr_addr = addr; curr_addr = addr;
if(line == (vga.line_compare & 0xff)) if(line == (vga.line_compare & 0x3ff))
curr_addr = 0; curr_addr = 0;
bitmapline = BITMAP_ADDR16(bitmap, line, 0); bitmapline = BITMAP_ADDR16(bitmap, line, 0);
addr %= vga.svga_intf.vram_size; addr %= vga.svga_intf.vram_size;

2
src/mame/drivers/calchase.c
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@ -522,7 +522,7 @@ static WRITE32_HANDLER(bios_ram_w)
static ADDRESS_MAP_START( calchase_map, AS_PROGRAM, 32 ) static ADDRESS_MAP_START( calchase_map, AS_PROGRAM, 32 )
AM_RANGE(0x00000000, 0x0009ffff) AM_RAM AM_RANGE(0x00000000, 0x0009ffff) AM_RAM
//AM_RANGE(0x000a0000, 0x000bffff) AM_RAM AM_BASE_MEMBER(calchase_state, m_vga_vram) //GRULL-ADDVGA //AM_RANGE(0x000a0000, 0x000bffff) AM_RAM AM_BASE_MEMBER(calchase_state, m_vga_vram) //GRULL-ADDVGA
AM_RANGE(0x000a0000, 0x000bffff) AM_NOP AM_RANGE(0x000a0000, 0x000bffff) AM_RAM
AM_RANGE(0x000c0000, 0x000c7fff) AM_RAM AM_REGION("video_bios", 0) AM_RANGE(0x000c0000, 0x000c7fff) AM_RAM AM_REGION("video_bios", 0)
AM_RANGE(0x000c8000, 0x000dffff) AM_NOP AM_RANGE(0x000c8000, 0x000dffff) AM_NOP
//GRULL AM_RANGE(0x000e0000, 0x000effff) AM_RAM //GRULL AM_RANGE(0x000e0000, 0x000effff) AM_RAM