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Arduino-USB-HID-RetroJoystickAdapter
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Update README.md

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