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abc1600: Improve comment

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This commit is contained in:
Curt Coder 2023-03-29 09:50:24 +03:00
parent c71b15a8a9
commit d00d71a4c5
1 changed files with 7 additions and 1 deletions
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8
src/mame/luxor/abc1600mac.cpp
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@ -579,7 +579,13 @@ void abc1600_mac_device::page_hi_w(offs_t offset, uint8_t data)
offs_t abc1600_mac_device::get_dma_address(int index, offs_t offset, bool &rw)
{
// A0 = DMA15, A1 = BA1, A2 = BA2
/*
BA2 BA1 A15
DMA0 1 1 x
DMA1 1 0 x
DMA2 0 0 x
*/
uint8_t dmamap_addr = index | BIT(offset, 15);
uint8_t dmamap = m_dmamap[dmamap_addr];