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upd7220: work around rainbow windows 1.0 issue (#5845) (nw)

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This commit is contained in:
cracyc 2019-11-03 16:12:50 -06:00
parent 169d310d2e
commit 3892c598f5
1 changed files with 10 additions and 4 deletions
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10
src/devices/video/upd7220.cpp
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@ -1111,21 +1111,27 @@ void upd7220_device::process_fifo()
uint8_t data;
int flag;
uint16_t eff_pitch = m_pitch >> m_figs.m_gd;
int cr;
dequeue(&data, &flag);
if (flag == FIFO_COMMAND)
{
cr = translate_command(data);
if (cr != COMMAND_BCTRL) // workaround for Rainbow 100 Windows 1.03, needs verification
{
m_cr = data;
m_param_ptr = 1;
}
}
else
{
cr = translate_command(m_cr);
m_pr[m_param_ptr] = data;
m_param_ptr++;
}
switch (translate_command(m_cr))
switch (cr)
{
case COMMAND_INVALID:
logerror("uPD7220 Invalid Command Byte %02x\n", m_cr);
@ -1258,7 +1264,7 @@ void upd7220_device::process_fifo()
break;
case COMMAND_BCTRL: /* display blanking control */
m_de = m_cr & 0x01;
m_de = data & 0x01;
//LOG("uPD7220 DE: %u\n", m_de);
break;