RetroFocus2015
New Member
1. As I can best describe it, the design is constantly changing in my mind, using parts I now have available. At the moment I have a AT28C256 32K EEPROM on the schematic. With import costs and - I suppose - rarity of older parts it seems a lot easier to obtain the newer parts with the bigger amounts of RAM and ROM on less chips. I think I'll use the 32k EEPROM and cram as much useful stuff on there as possible, like ASCII characters etc.
2. Something like this **broken link removed** You could plug just about anything into these expansion ports like joysticks, RAM upgrades, printers, light pens etc using an interface like this one on a TRS-80 https://www.nightfallcrew.com/09/07...s-80-modello-mc-10-con-espansione-ram-di-16k/