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chessking: update note

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This commit is contained in:
hap 2022-12-28 16:20:15 +01:00
parent c254f1ba3c
commit e4fcd55225
1 changed files with 3 additions and 6 deletions
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9
src/mame/handheld/chessking.cpp
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@ -9,7 +9,8 @@ TODO:
- lots of unknown writes
- sound emulation is guessed
- LCD chip(s) is not emulated, maybe the I/O chip does a DMA from RAM to the LCD?
- chess game makes an illegal move sometimes, BTANB?
- chess game is buggy, assume that's just the way it is, aka BTANB
eg. sometimes it makes an illegal move, or castling doesn't erase the king
Hardware notes:
@ -125,11 +126,7 @@ uint32_t chessking_state::screen_update(screen_device &screen, bitmap_rgb32 &bit
// 2 256x256 images (160x160 area used) one at c000, one at e000 to form 2bpp graphics
uint8_t data = m_videoram[0x4000 + offset + x/8];
uint8_t data2 = m_videoram[0x6000 + offset + x/8];
int xx = x % 8;
uint8_t pix = (data >> (7 - xx)) & 1;
pix |= ((data2 >> (7 - xx)) & 1) << 1;
uint8_t pix = BIT(data, ~x & 7) | BIT(data2, ~x & 7) << 1;
rgb_t pens[4] = { rgb_t::white(), rgb_t(0x55,0x55,0x55), rgb_t(0xaa,0xaa,0xaa), rgb_t::black() };
dst[x] = pens[pix];