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Jarno Lehtinen 2022-04-05 21:29:26 +03:00 committed by GitHub
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C64_4joy_adapter/README.md
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``` ```
375ns 375ns
## using i/o space ## using data/i/o space
- Can be used with in/out (i/o space) or lds (data space = i/o address+0x20)? - lds can load from io (if +0x20 added to address) or data space
- Compiler can detect what space is used and uses correct address? - sts can store from register to io (if +0x20 added to address) or data space
- in/out is 1 cycle? lds 2 cycles? - in can load from io to register
- out can write from register to io
- only one io/data address space access within one instruction?
## avr asm ## avr asm
- http://www.nongnu.org/avr-libc/user-manual/inline_asm.html - http://www.nongnu.org/avr-libc/user-manual/inline_asm.html