- 6o6 v1.1 improves performance with faster addressing modes, trimmed instruction from hot path, interrupt flag control, and fast zero page stores.
- The update includes an Apple-1 emulator (VA1) running on Commodore 64 or Apple II, celebrating Apple's 50th anniversary and the author's 50th year.
- 6o6 uses macros from xa65 for inlining memory access, reducing host instructions per guest instruction from 52.3 to 51.0 (2.6% improvement).
- Apple-1 hardware details: WOZMON monitor, 40x24 text display using shift registers, memory map via jumpers, and no CPU-accessible video memory.
- History of Apple-1 emulators: Mark Stock's Apple II emulator (2006), Simon Owen's SAM Coupé emulator, Green Delicious for C64, and VA1 using 6o6.
- VA1 provides isolation via 6o6, syncs to jiffy clock, handles exceptions, and allows running unmodified Apple-1 software on C64 and Apple II.
- Future plans include a fast path for stack operations and a dynamic pagetable to simplify memory access.