Genesis Programming/Z80 programming considerations

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Memory map

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Start End Description
0000h 1FFFh Z80 RAM
2000h 3FFFh Reserved
4000h YM2612 A0
4001h YM2612 D0
4002h YM2612 A1
4003h YM2612 D1
4004h 5FFFh Reserved
6000h Bank register
6001h 7F10h Reserved
7F11h PSG
7F12h 7FFFh Reserved
8000h FFFFh 68000 memory bank

Z80 Architecture

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Block diagram of the Z80 architecture.

Read more

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There is a separate Wikibook on Z80 Assembly.