Surgery was a success! The ZX81 now has composite video! Shame most of the keys don’t work (probably the shitty ends on the connectors to be fair) but in all honesty I was planning on replacing it outright with a complete front patio remodelling if you know what I mean.
That and the 32K internal ram mod and first round of renovations is done!
@grimmware did it originally have RF out? Did you just take the video signal from before the high-frequency modulator, or was it more complicated than that?
@wolf480pl yes and yes :)
It was crazy simple, I just snipped the video and 5V in just inside the case for the modulator (okay, ended up doing video in just *outside* because the wire was jammed in between a resistor and a capacitor) and the video out from the output jack and wired all three into a TheFutureWas8Bit Atari 2600 composite mod, along with ground to the modulator casing.
Basically just followed this http://blog.tynemouthsoftware.co.uk/2016/11/zx81-composite-video-modification.html
Nice. My first computer was a Timex Sinclair 1000, which was pretty much the same machine as the ZX81. Man, did it ever run slower with the 16 kb RAM expansion cartridge...
@m3lang3 I’ve got one of those :) I’m going to do an internal 32K RAM mod and the see if I can use the edge connector as GPIO instead!
@grimmware As someone who's first machine was the US model (2k, not 1k, NTSC; all the rest is the same - save branding) I'm excited to see this (:
I still have mine, in storage, and... maybe one day I'll get it here and ... maybe by then I'll know z80 (:
which never worked because ... it was for a mainframe, and the folks who sold it bilked him out of his money, which ... well he wanted to be supportive, and ... yeah.
anyway. would like to share if I can.
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