Tag: atmega8

Translates a PS/2 mouse into Commodore 1351-style analog mouse signals for the C64 and C128.

Retro Computer Store listed an assembled adapter as available for USD 16 on 2026-07-30. PCBWay exposes a through-hole fabrication route with Gerbers, a bill of materials, and programming notes. The current assembled version supports PS/2 mice and PS/2-compatible serial mice but explicitly does not support a USB mouse through a passive PS/2 adapter. A working SID analog-input path is required; some replacement SID implementations omit it.

Emulates writable Atari XL and XE floppy drives from SD storage using the original ATmega8 SDrive design or the NUXX packaging variant.

The original GPL-3.0 hardware, firmware, Atari-side software, documentation, and source remain public. Its 2009 documentation specifies cards up to 2 GB with FAT16, while the repository also contains a later 2012 SDHC-supporting source revision; match the firmware, media setup, and documentation deliberately. The NUXX archive is frozen as of 2020 and says its function is identical to original SDrive, but adds a different PCB, enclosure, connector options, and optional STK200-style parallel-port programmer. No current assembled seller was verified.

Converts a Super Nintendo controller into Atari-style direction and fire signals for tested Commodore, Amiga, and Atari computers.

This is a build project rather than a current assembled product. Use the published Atari/Commodore wiring, ground PB1 to select that mode, and program the ATmega8A with the documented firmware and fuse bytes. The maker reports successful tests on a C64, Amiga 500, Amiga 600, and Atari 130XE; the 130XE relationship is banked because that exact target is not yet in the catalog. Minimig and Amiga CD32 are explicitly unsupported.