Differences
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Both sides previous revisionPrevious revision | |||
io [2022/11/11 14:18] – [Configuration] pulkomandy | io [2022/11/11 15:33] (current) – [ROM and cartridge] pulkomandy | ||
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* IOB2: Set to 0 to enable internal ROM | * IOB2: Set to 0 to enable internal ROM | ||
+ | Note: these can be used with the " | ||
+ | |||
+ | For example in external address mode 2 or 3 (4 ROMs mode): | ||
+ | |||
+ | ^Pin | ||
+ | |IOB0 |100000-1FFFFF| | ||
+ | |IOB1 |200000-2FFFFF| | ||
+ | |IOB2 |300000-3FFFFF| | ||
+ | |ROMCSB|008000-0FFFFF| | ||
+ | |||
+ | In external address mode 0: ROMCSB is the only one used for the whole range (note: ROMCSB is not wired to anything, so in this area no ROM will be enabled) | ||
+ | |||
+ | In external mode 1 (2 ROMs mode): | ||
+ | |||
+ | ^Pin | ||
+ | |IOB1 |200000-3FFFFF| | ||
+ | |ROMCSB|008000-1FFFFF| | ||
+ | |||
+ | Additionally, | ||
===== Power control ===== | ===== Power control ===== | ||