Could be just that this kind of thing lives on the boundary of electronics, software and precision timing (e.g. for PAL it's necessary to either clock a determi

Could be just that this kind of thing lives on the boundary of electronics, software and precision timing (e.g. for PAL it's necessary to either clock a deterministic MCU at a precise multiple of the colour subcarrier, or use a pile of dedicated logic - lots of chips for TTL or cheat by using an FPGA). To me it just feels 'wrong' to use modern tech to implement a memory-mapped display on a Z80 (I still have a working Nascom 1 [0], which managed to fit a memory-mapped text display into a system with a total 2K of RAM). Happy to discuss further, email is in profile. [0] https://en.wikipedia.org/wiki/Nascom_(computer_kit) https://en.wikipedia.org/wiki/Nascom_(computer_kit)