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video/pc_vga_cirrus.cpp: fix MT#08763

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angelosa 2023-09-11 03:26:12 +02:00
parent 9c284a74fb
commit b8d767366d
2 changed files with 6 additions and 15 deletions
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2
hash/pc98.xml
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@ -66656,7 +66656,7 @@ doujin?!?
<publisher>&lt;doujin&gt;</publisher> <!-- is this really a doujin soft? -->
<notes><![CDATA[
Black screen [FDC] 2DD disk
Supposedly has XA and LT support
Has XA and LT support according to spine card
]]></notes>
<info name="author" value="Fancy Soft" />
<info name="alt_title" value="ファイブギャルズコネクション" />

19
src/devices/video/pc_vga_cirrus.cpp
View File

@ -118,6 +118,7 @@ void cirrus_gd5428_device::ramdac_hidden_mask_w(offs_t offset, u8 data)
// TODO: '5428 reads do not lock the Hidden DAC
m_hidden_dac_mode = data;
m_hidden_dac_phase = 0;
cirrus_define_video_mode();
LOGMASKED(LOG_HDAC, "CL: Hidden DAC write %02x\n", data);
return;
}
@ -536,6 +537,7 @@ void cirrus_gd5428_device::sequencer_map(address_map &map)
gc_locked = (data & 0x17) != 0x12;
LOG("Cirrus register extensions %s\n", gc_locked ? "unlocked" : "locked");
m_lock_reg = data & 0x17;
cirrus_define_video_mode();
})
);
map(0x07, 0x07).lw8(
@ -788,12 +790,6 @@ void cirrus_gd5428_device::cirrus_define_video_mode()
const XTAL xtal = XTAL(14'318'181);
uint8_t clocksel = (vga.miscellaneous_output & 0xc) >> 2;
svga.rgb8_en = 0;
svga.rgb15_en = 0;
svga.rgb16_en = 0;
svga.rgb24_en = 0;
svga.rgb32_en = 0;
if(gc_locked || m_vclk_num[clocksel] == 0 || m_vclk_denom[clocksel] == 0)
clock = ((vga.miscellaneous_output & 0xc) ? xtal*2: xtal*1.75).dvalue();
else
@ -804,9 +800,10 @@ void cirrus_gd5428_device::cirrus_define_video_mode()
clock = (xtal * numerator / denominator / mul).dvalue();
}
svga.rgb8_en = svga.rgb15_en = svga.rgb16_en = svga.rgb24_en = svga.rgb32_en = 0;
if (!gc_locked)
{
svga.rgb8_en = svga.rgb15_en = svga.rgb16_en = svga.rgb24_en = 0;
// gambl186 relies on this, don't setup any hidden DAC but only this
if (vga.sequencer.data[0x07] & 0x01)
svga.rgb8_en = 1;
@ -867,13 +864,7 @@ uint16_t cirrus_gd5428_device::offset()
uint16_t off = vga_device::offset();
// TODO: check true enable condition
if (svga.rgb8_en == 1)
off <<= 2;
if (svga.rgb16_en == 1)
off <<= 2;
if (svga.rgb24_en == 1)
off <<= 2;
if (svga.rgb32_en == 1)
if (svga.rgb8_en || svga.rgb15_en || svga.rgb16_en || svga.rgb24_en || svga.rgb32_en)
off <<= 2;
// popmessage("Offset: %04x %s %s ** -- actual: %04x",vga.crtc.offset,vga.crtc.dw?"DW":"--",vga.crtc.word_mode?"BYTE":"WORD",off);
return off;