Feature coverage per architecture

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

feature	6502	65816	Z80	8080	LR35902
*, *=	✔️	✔️	🐌	🐌	🐌
>>', >>'=	✔️	✔️	✔️	✔️	✔️
other decimal operators	📺1	✔️	✔️	✔️	✔️
signed comparisons	⚠️	⚠️	❌	❌	❌2
stack variables	✔️	✔️	✔️	🐌	🐌
assembly	✳️3	🚧	✔️	✔️4	🚧4
other features	✔️	🐌	✔️	✔️	✔️
optimization	✔️	🚧5	🚧	🚧	🚧

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. Not available on Ricoh processors due to the lack of hardware support.

2. No hardware support.

3. 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.

4. Zilog syntax only. Instructions with ($FF00+d) addressing are not supported yet

5. Optimized for the processor in the emulation mode used as an accelerator for a 6502-based system. Doesn't utilize its full capabilities in the native mode.

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.

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