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upd7220: mm1m6 seems to depend on fifo showing empty when there's one byte left to read (nw)

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This commit is contained in:
cracyc 2015-10-11 20:22:06 -05:00
parent 43c85d594d
commit 651a18c181
2 changed files with 3 additions and 7 deletions
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7
src/devices/video/upd7220.c
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@ -316,11 +316,10 @@ inline void upd7220_device::dequeue(UINT8 *data, int *flag)
m_fifo_ptr--;
if (m_fifo_ptr == -1)
{
m_sr &= ~UPD7220_SR_DATA_READY;
if (m_fifo_ptr <= 0)
m_sr |= UPD7220_SR_FIFO_EMPTY;
}
if (m_fifo_ptr == -1)
m_sr &= ~UPD7220_SR_DATA_READY;
}
}

3
src/mame/video/mikromik.c
View File

@ -70,9 +70,6 @@ ADDRESS_MAP_END
UPD7220_DISPLAY_PIXELS_MEMBER( mm1_state::hgdc_display_pixels )
{
UINT16 data = m_video_ram[address >> 1];
if(y >= 25)
y -= 25;
for (int i = 0; i < 16; i++)
{
if (BIT(data, i)) bitmap.pix32(y, x + i) = m_palette->pen(1);