6502

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List of 6502 based computers and 6502 history
2 months ago
- The MOS 6502 50th anniversary shirt design is now available.
- Key designs include a 40-pin DIP chip, Apple I, and more.
- Mentions a 6502-powered watch project and various classic computers like EMMA II, SYM-1, PAL-1, Micro-KIM, and AIM-65.
- Encourages finding toys and gadgets that contain a 6502 processor.
6o6 v1.1: Faster 6502-on-6502 virtualization for a C64/Apple II Apple-1 emulator
2 months ago
- 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.
The MOnSter 6502 (2016)
2 months ago
- The MOnSter 6502 is a giant transistor-scale replica of the MOS 6502 microprocessor, measuring 12x15 inches with over 4000 surface mount components and 167 indicator LEDs.
- The project is still underway and the first prototype will be shown at the Bay Area Maker Faire, though it may not be fully functional yet.
- The MOnSter 6502 is not currently sold as a kit or product, but there is a mailing list for updates.
- Reader comments express strong interest in purchasing the replica as a kit or bare board, with some suggesting its potential as a teaching tool and display piece.
- Technical discussion includes expansion boards for the BBC Micro that could run at higher clock speeds using a CMOS 6502 and separate RAM.
The Visual 6502
2 months ago
- The Visual 6502 simulator uses HTML5 and requires the latest browsers and significant RAM.
- Keyboard controls: 'z' to zoom in, 'x' to zoom out, 'n' to step the simulation.
- Mouse controls: left-click and drag to scroll when zoomed in.
- More information is available in the User Guide, and source code is on GitHub.
- Links to online emulator, assembler, and disassembler are provided, plus an Advanced page for deeper investigation.

List of 6502 based computers and 6502 history

6o6 v1.1: Faster 6502-on-6502 virtualization for a C64/Apple II Apple-1 emulator

The MOnSter 6502 (2016)

The Visual 6502