Leningrad construction Project Pt 2: hot swapping ROMS
So at the end of the previous update one of the ROM sockets was modified to accept a 27c128 (instead of using two 27C64 as is standard) of course I didn't have any 27c128 so I ended up using a 27C256 32KB EPROM with the image of the operating system copied twice over (N.B this wasn't actually needed. I could've just burned it into the upper half). In my search for the stock ROM however I found this site . An archive of various ZX Spectrum ROMs from various countries and different machines. So for reasons I will disclose in the future I have a bundle of 27C512s lying around, this got me thinking. There's a few different ROMS that caught my eyes when I was browsing so what if I could swap between them without having to go through the process of removing and replacing the EPROM. Now of course I could just put a dip switch on the extra address lines and be done with it but that might lead to crashes and instability if say, I flipped the switches whilst the computer was ru...