PICOZX81 - a ZX81 emulator for Raspberry Pi Pico

Author	Message
Exile Newbie Joined: 27/05/2023 Location: United Kingdom Posts: 28	Posted: 01:12pm 08 Mar 2025         Frank N. Furter said   @Exile: Can you tell me exactly what I have to set where to load the ROM? The 3 ROM files (ZX80, ZX81, ZX81 improved ROM) supported by picozx81 are linked into the binary. You cannot load an arbitrary ROM file. The reason for this is that to use the SD Card, picoZX81 needs to know the addresses of the ROM LOAD and SAVE routines and intercept them. These addresses differ in the Forth ROM compared to the standard ZX81 ROM. There are several version of Forth for the ZX81 that do not require a new ROM, such as the Artic Forth, Toddy Forth etc. You could try one of those.