Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-22 08:22:15 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

pc9801: egc improvement

Browse Source
This commit is contained in:
cracyc 2024-11-08 18:13:09 -06:00
parent 3cec3eb18d
commit a501fa97fd
2 changed files with 1 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
src/mame/nec/pc9801.cpp
View File

@ -850,6 +850,7 @@ void pc9801vm_state::egc_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
case 6:
case 7:
m_egc.leftover[0] = m_egc.leftover[1] = m_egc.leftover[2] = m_egc.leftover[3] = 0;
m_egc.count = (m_egc.regs[7] & 0xfff) + 1;
m_egc.first = true;
m_egc.init = false;

7
src/mame/nec/pc9801_v.cpp
View File

@ -826,13 +826,6 @@ uint16_t pc9801vm_state::egc_blit_r(uint32_t offset, uint16_t mem_mask)
m_egc.pat[2] = m_video_ram[1][plane_off + (0x4000 * 3)];
m_egc.pat[3] = m_video_ram[1][plane_off];
}
//TODO: this needs another look
/*if(m_egc.first && !m_egc.init)
{
m_egc.leftover[0] = m_egc.leftover[1] = m_egc.leftover[2] = m_egc.leftover[3] = 0;
if(((m_egc.regs[6] >> 4) & 0xf) >= (m_egc.regs[6] & 0xf)) // check if we have enough bits
m_egc.init = true;
}*/
m_egc.init = true;
for(int i = 0; i < 4; i++)
m_egc.src[i] = egc_shift(i, m_video_ram[1][plane_off + (((i + 1) & 3) * 0x4000)]);