4 ms·
Yea, I don't know what the barrier is. But there is some barrier. I would think that by now, and this hobby of make 8-bit CPUs is by no means "new", there would
by whartung 5y ago
Yea, I don't know what the barrier is. But there is some barrier. I would think that by now, and this hobby of make 8-bit CPUs is by no means "new", there would be some "oh, Frank did that and has a circuit" so that, at least, everyone makes a stab at using Franks video subsystem.
But, nothing.
- zh3 5y agoCould 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)