@pulkomandy@mastodon.tetaneutral.net
Post #1582249
2026-04-12 19:39 UTC
For afew days I was thinking about ways to interface the EF9367 video chip with 4464 RAM (it is designed for 4116 originally). I thought I could use "page mode" to do two successive accesses to the RAM and avoid having to use 8 RAM chips. But it's not going to happen, the EF9367 is way too slow for that. I hadn't realized how tight its timings are. This could be fixed with some extra buffers, but then the circuit becomes way too complicated.
Well, one useless project out of my mind :)
Replies (1)
-
@AGMS00@ruby.social 2026-04-13 03:18
Looks up EF9367. Ooo, ahh, it can do 512 pixel wide scan lines. That means 80 column text! My current project #NthPongEars for the #NabuPC uses a 4 year older TMS9918A video chip that just does 256 pixels per line.