Great article, especially for learning different techniques. A few years back I needed some extra RAM for a small database so I cobbled together a poor man's REX; just a 32K RAM chip piggybacked on the system ROM with a couple of flying leads for /WE, /CE etc.
Functionally it's a clone of EME's ExtRAM, compatible with all its tools and utilities to load/save/dump/swap/etc. memory, load & save files and, yes, PEEK and POKE the OptROM memory space. As the database grew I started on a 4MB bank switched version along the lines of the XR4 but then Steve came out with the 4MB CP/M device; in the end I finally moved it to a PC anyway ;-) m ----- Original Message ----- From: John R. Hogerhuis To: [email protected] Sent: Thursday, December 22, 2022 3:37 AM Subject: [M100] New article on the Bitchin100 wiki... peeking Option ROM Space I wrote up an article on PEEKing an Option ROM from a BASIC program based on a question that came up on Facebook. Well, really most of the article is about how to embed ML subroutines as strings in your program. https://bitchin100.com/wiki/index.php?title=Peeking_the_Option_ROM_From_a_BASIC_Program -- John.
