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ef9345: implement commands CLF and CLG #14288

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Merged
merged 1 commit into from
Oct 8, 2025
Merged

ef9345: implement commands CLF and CLG #14288

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24 changes: 20 additions & 4 deletions src/devices/video/ef9345.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -213,7 +213,10 @@ TIMER_CALLBACK_MEMBER(ef9345_device::blink_tick)
void ef9345_device::set_busy_flag(int period)
{
m_bf = 1;
m_busy_timer->adjust(attotime::from_nsec(period));
if (period < 0)
m_busy_timer->reset();
else
m_busy_timer->adjust(attotime::from_nsec(period));
}

// draw a char in 40 char line mode
Expand Down Expand Up @@ -846,6 +849,21 @@ void ef9345_device::ef9345_exec(uint8_t cmd)
m_videoram->write_byte(a + 0x0800, m_registers[2]);
if (cmd&1) inc_x(7);
break;
case 0x05: //CLF: Clear page 24 bits
case 0x07: //CLG: Clear page 16 bits
set_busy_flag(-1);
for (int i = 0; i < 32 * 40; i++)
{
a = indexram(7);
m_videoram->write_byte(a, m_registers[1]);
m_videoram->write_byte(a + 0x0800, m_registers[2]);
if (cmd == 0x05)
m_videoram->write_byte(a + 0x1000, m_registers[3]);
inc_x(7);
if ((m_registers[7] & 0x3f) == 0)
inc_y(6);
}
break;
case 0x08: //KRF: ram->R1,R2,R3
case 0x09: //KRF: ram->R1,R2,R3 + increment
set_busy_flag(7500);
Expand Down Expand Up @@ -1019,7 +1037,7 @@ void ef9345_device::ef9345_exec(uint8_t cmd)
uint8_t r2 = (cmd&0x04) ? 5 : 7;
int busy = 2000;

for (i = 0; i < 1280; i++)
for (i = 0; i < 32 * 40; i++)
{
a1 = indexram(r1); a2 = indexram(r2);
m_videoram->write_byte(a2, m_videoram->read_byte(a1));
Expand All @@ -1046,8 +1064,6 @@ void ef9345_device::ef9345_exec(uint8_t cmd)
set_busy_flag(busy);
}
break;
case 0x05: //CLF: Clear page 24 bits
case 0x07: //CLG: Clear page 16 bits
case 0x40: //KRC: R1 -> ram
case 0x41: //KRC: R1 -> ram + inc
case 0x48: //KRC: 80 characters - 8 bits
Expand Down
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