On 12/23/22 13:23, John R. Hogerhuis wrote:
On Thu, Dec 22, 2022 at 5:10 PM MikeS <[email protected]> wrote:
Great article, especially for learning different techniques.
Thanks Mike.
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 ;-)
Good stuff :-) Nice to have systems on a scale and simplicity where
it's actually possible to DIY a hardware solution. Though, yeah the PC
doesn't have the limitations to solve.
-- John.
The skills of the enthusiasts on this list amaze me.
