From Thomas Cherryholmes:
Last year, a few of us documented and reconstructed The Frob, an #atari2600#GameDev system for the #AppleII. It has some very hard to get parts. So I’ve re-done it as an RP2354 based card, with firmware.
What this card is:A modern, register-compatible replacement for the FROB (Frobco, 1982), the Apple II card for Atari 2600 development. The original is 22 74LS packages and two M58725P 2K x 8 SRAMs; parts that are hard to find today, and whose modern substitutes make reconstructed boards erratic. Frob2354 is one RP2354B (RP2350B + 2 MB flash), four 74LVC245A bus buffers, two single gates and a 3.3 V LDO on an Apple II slot card, with the original’s DIP-24 cable socket so the existing FROB cable and 2600 cartridge adapter plug straight in, and the original register map, so the existing FROB software runs unchanged.
For more information about the new card, check out the GitHub page for the Modern Apple II FROB card at https://github.com/tschak909/frob-modern
