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apple2: perform single-pixel shift for HGR monochrome with bit 7 set [R. Belmont, SoltanGris42]

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This commit is contained in:
arbee 2019-11-28 22:34:05 -05:00
parent 9c8934c5c0
commit b4bc924018
1 changed files with 49 additions and 2 deletions
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51
src/mame/video/apple2.cpp
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@ -843,7 +843,6 @@ void a2_video_device::hgr_update(screen_device &screen, bitmap_ind16 &bitmap, co
| (((uint32_t) vram_row[col+1] & 0x7f) << 7)
| (((uint32_t) vram_row[col+2] & 0x7f) << 14);
// verified on h/w: setting dhires w/o 80col emulates a rev. 0 Apple ][ with no orange/blue
if (m_dhires)
{
@ -873,6 +872,10 @@ void a2_video_device::hgr_update(screen_device &screen, bitmap_ind16 &bitmap, co
case 1:
w >>= 7;
if (vram_row[col] & 0x80)
{
p--;
}
for (b = 0; b < 7; b++)
{
v = (w & 1);
@ -880,10 +883,18 @@ void a2_video_device::hgr_update(screen_device &screen, bitmap_ind16 &bitmap, co
*(p++) = v ? WHITE : BLACK;
*(p++) = v ? WHITE : BLACK;
}
if (vram_row[col] & 0x80)
{
p++;
}
break;
case 2:
w >>= 7;
if (vram_row[col] & 0x80)
{
p--;
}
for (b = 0; b < 7; b++)
{
v = (w & 1);
@ -891,10 +902,18 @@ void a2_video_device::hgr_update(screen_device &screen, bitmap_ind16 &bitmap, co
*(p++) = v ? GREEN : BLACK;
*(p++) = v ? GREEN : BLACK;
}
if (vram_row[col] & 0x80)
{
p++;
}
break;
case 3:
w >>= 7;
if (vram_row[col] & 0x80)
{
p--;
}
for (b = 0; b < 7; b++)
{
v = (w & 1);
@ -902,6 +921,10 @@ void a2_video_device::hgr_update(screen_device &screen, bitmap_ind16 &bitmap, co
*(p++) = v ? ORANGE : BLACK;
*(p++) = v ? ORANGE : BLACK;
}
if (vram_row[col] & 0x80)
{
p++;
}
break;
}
}
@ -962,8 +985,12 @@ void a2_video_device::hgr_update_tk2000(screen_device &screen, bitmap_ind16 &bit
}
break;
case 1:
\ case 1:
w >>= 7;
if (vram_row[col] & 0x80)
{
p--;
}
for (b = 0; b < 7; b++)
{
v = (w & 1);
@ -971,10 +998,18 @@ void a2_video_device::hgr_update_tk2000(screen_device &screen, bitmap_ind16 &bit
*(p++) = v ? WHITE : BLACK;
*(p++) = v ? WHITE : BLACK;
}
if (vram_row[col] & 0x80)
{
p++;
}
break;
case 2:
w >>= 7;
if (vram_row[col] & 0x80)
{
p--;
}
for (b = 0; b < 7; b++)
{
v = (w & 1);
@ -982,10 +1017,18 @@ void a2_video_device::hgr_update_tk2000(screen_device &screen, bitmap_ind16 &bit
*(p++) = v ? GREEN : BLACK;
*(p++) = v ? GREEN : BLACK;
}
if (vram_row[col] & 0x80)
{
p++;
}
break;
case 3:
w >>= 7;
if (vram_row[col] & 0x80)
{
p--;
}
for (b = 0; b < 7; b++)
{
v = (w & 1);
@ -993,6 +1036,10 @@ void a2_video_device::hgr_update_tk2000(screen_device &screen, bitmap_ind16 &bit
*(p++) = v ? ORANGE : BLACK;
*(p++) = v ? ORANGE : BLACK;
}
if (vram_row[col] & 0x80)
{
p++;
}
break;
}
}