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pc9801: save the egc pattern regs when set on write

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This commit is contained in:
cracyc 2024-11-11 21:13:13 -06:00
parent 6b774ce0cf
commit 7195c63f28
1 changed files with 9 additions and 6 deletions
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15
src/mame/nec/pc9801_v.cpp
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@ -729,7 +729,6 @@ void pc9801vm_state::egc_blit_w(uint32_t offset, uint16_t data, uint16_t mem_mas
{ {
if(BIT(m_egc.regs[2], 10)) if(BIT(m_egc.regs[2], 10))
{ {
m_egc.leftover[0] = 0;
egc_shift(0, data); egc_shift(0, data);
// leftover[0] is inited above, set others to same // leftover[0] is inited above, set others to same
m_egc.leftover[1] = m_egc.leftover[2] = m_egc.leftover[3] = m_egc.leftover[0]; m_egc.leftover[1] = m_egc.leftover[2] = m_egc.leftover[3] = m_egc.leftover[0];
@ -742,8 +741,6 @@ void pc9801vm_state::egc_blit_w(uint32_t offset, uint16_t data, uint16_t mem_mas
if(m_egc.first) if(m_egc.first)
{ {
mask &= dir ? ~((1 << dst_off) - 1) : ((1 << (16 - dst_off)) - 1); mask &= dir ? ~((1 << dst_off) - 1) : ((1 << (16 - dst_off)) - 1);
if(BIT(m_egc.regs[2], 10) && !m_egc.init)
m_egc.leftover[0] = m_egc.leftover[1] = m_egc.leftover[2] = m_egc.leftover[3] = 0;
m_egc.init = true; m_egc.init = true;
} }
@ -762,6 +759,15 @@ void pc9801vm_state::egc_blit_w(uint32_t offset, uint16_t data, uint16_t mem_mas
mask &= end_mask; mask &= end_mask;
} }
// load all the plane pattern regs
if((m_egc.regs[2] & 0x300) == 0x200)
{
m_egc.pat[0] = m_video_ram[1][offset + 0x4000];
m_egc.pat[1] = m_video_ram[1][offset + (0x4000 * 2)];
m_egc.pat[2] = m_video_ram[1][offset + (0x4000 * 3)];
m_egc.pat[3] = m_video_ram[1][offset];
}
for(int i = 0; i < 4; i++) for(int i = 0; i < 4; i++)
{ {
if(!BIT(m_egc.regs[0], i)) if(!BIT(m_egc.regs[0], i))
@ -770,9 +776,6 @@ void pc9801vm_state::egc_blit_w(uint32_t offset, uint16_t data, uint16_t mem_mas
if(BIT(m_egc.regs[2], 10)) if(BIT(m_egc.regs[2], 10))
src = egc_shift(i, data); src = egc_shift(i, data);
if((m_egc.regs[2] & 0x300) == 0x200)
pat = m_video_ram[1][offset + (((i + 1) & 3) * 0x4000)];
switch((m_egc.regs[2] >> 11) & 3) switch((m_egc.regs[2] >> 11) & 3)
{ {
case 0: case 0: