Feature coverage per architecture

The following table shows which features are implemented for which CPU architecture.

feature	6502	Z80
+', -', +'=, -'=	📺	✔️
*, *=	✔️	🐌
*', *'=	📺	❌
<<', <<'=	📺	❌
>>', >>'=	✔️	❌
signed comparisons	⚠️	❌
assembly	✳️1	🚧2
other features	✔️	✔️

Legend:

✔️ – implemented
📺 – implemented only for subarchitectures that support it natively
🐌 – implemented, but suboptimal
✳️ – implemented fully for the base architecture, but partially for extensions
🚧 – partially implemented
⚠️ – implemented, but incorrectly
❌ – not implemented yet

Notes:

1. All 6502, 65SC02 and 65CE02 instructions are supported. 65C02 bit setting/testing instructions, some HuC6280 instructions and some 65816 instructions and addressing modes are not supported.

2. Bit setting/testing instructions and few other instructions are not supported.

Further remarks

• Implemented features may require a zeropage register on 6502 targets.

• 65816 code is quite suboptimal. If you're targeting a 65816 machine only, consider using something else for the time being.

• Intel 8080 and Gameboy support added right now would mean no support for stack variables.

• CPU's from the 6800 and 8086 families might be added in the future.