Sinclair ZX80 / ZX81 / Z88 Forums

Working, sorry for that stupid question. just need to disable the overlay rom.

So i need to disable the overlay ROM?

sorry if im bad with this

I don't have a 16k ram pack so im using the 32k from the zxpand. I want to load a game from a cassette just for the fun. In the manual of the zxpand, it is saying if you want to load a game from a cassette with the zxpand connected just enter the command load "". The problem i have now, all the game...

Working now !!!

i sent it for repair and the problem was the ULA that was dead.

i received it back yesterday, tested and working(and i have the zxvid mod now also).

1024MAK wrote:On your TV, in the picture that you posted, the TV/Cable switch is the only one that is likely to change between VHF and UHF.

Mark

The tv/cable switch seems to only put back the TV to Channel 3.

thanks for the information guys. I try connect the machine with my rf adapter right to the VHF input on my tv and when i put on the power of the computer, the screen change from white snow to black snow. I still hear the sound of the snow. i try changing the v-sync, the color, the bright, the contra...

Or just screw it. i will put the composite mod.

I'm in Canada and have a ZX81 (again not Timex) from early on. Unlike the Timex iterations, it has a UHF modulator. Try reconnecting your antenna leads and looking for your signal on UHF. (Channel 38 rings a bell but I'm not certain of that.) Hello brother :) me too im from Canada lol But for your ...

it is snowing But i think i found the solution this morning while reading the manual. Because my TV use a VHF 75ohm and need a 300ohm signal, the manual said i need to go to my electronic store and buy a VHF UHF Transformer. It supose to convert the signal 75ohm to 300ohm. Will try that tonight(i ho...

Hi, im new to the forum :) And i just got myself a ZX81 (american version) im talking about a real zx81 american version, not the timex 1000. I receive it today but the computer don't work. i connect the computer to the tv. on VHF channel 3. when i power the computer, the screen do some flickering b...