Search found 155 matches

by Bill H
Thu Mar 29, 2018 1:32 am
Forum: Sinclair Misc
Topic: Why the difference in TV out port?
Replies: 2
Views: 1927

Why the difference in TV out port?

I have a USA version of the ZX81 (not the TS1000) and it has the TV out like the picture below but it also has a recess where you could remove the cut out for TV out closer to the EAR & MIC like the 2nd picture - why the difference?
zx81-1.JPG
zx81-2.JPG
by Bill H
Mon Mar 19, 2018 11:01 pm
Forum: Hardware
Topic: ZX81 Letters
Replies: 8
Views: 3046

ZX81 Letters

Has anyone repainted the ZX81 raised letters and the ZX81 16K RAM raised letters before? I have tried but I keep getting ink on the sides and it originally was only on the top of the letters.

Bill H
by Bill H
Sat Mar 17, 2018 9:05 pm
Forum: Welcome Area
Topic: Hello again
Replies: 6
Views: 2346

Re: Hello again

I got my ZX81 USA today - from the son of the original owner. Complete (except missing box) and works great. Interesting thing is they got it through a program American Express had where you could get the Zx81 for $99 direct from Amex, has that paperwork with it - I'll post pictures soon. I'm going ...
by Bill H
Fri Mar 16, 2018 8:27 pm
Forum: Welcome Area
Topic: Hello again
Replies: 6
Views: 2346

Re: Hello again

I have a Zx81 with 16K on its way to me - supposed to be USA version - so should I expect it to be 60 frames and 2K or? Also I will want to make the composite video conversion soon after receiving so can someone point me to the very easiest way of doing such?

Bill H
by Bill H
Thu Mar 15, 2018 1:47 pm
Forum: Development
Topic: Tzxduino
Replies: 3
Views: 1984

Re: Tzxduino

Well that kinda sucks but I guess it makes sense if you are only saving the sound and not caring about the content. :(

Bill H
by Bill H
Thu Mar 15, 2018 1:12 pm
Forum: Development
Topic: Tzxduino
Replies: 3
Views: 1984

Tzxduino

Has anyone used this? Does it handle .P files or? https://www.ebay.com/itm/Tzxduino-Casduino-Zx-Spectrum-16-48k-Msx-Amstrad-6128-Dragon-32-64-and-ZX81/173091659474?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D1%26asc%3D20140131123730%26meid%3Ddf399a2c57b7457aa770df59f7c96efd%26pid%3D100167%26rk%3D...
by Bill H
Thu Mar 15, 2018 1:09 pm
Forum: Software
Topic: ZX81CRSS.ASM
Replies: 12
Views: 5228

Re: ZX81CRSS.ASM

Sweet!
by Bill H
Wed Mar 14, 2018 11:49 pm
Forum: Software
Topic: ZX81CRSS.ASM
Replies: 12
Views: 5228

Re: ZX81CRSS.ASM

Answered my own question on the zx81 rom source code

https://raw.githubusercontent.com/tom-s ... s/zx81.txt

Bill H
by Bill H
Wed Mar 14, 2018 11:46 pm
Forum: Software
Topic: Help wanted
Replies: 10
Views: 3429

Re: Help wanted

Thanks!
by Bill H
Wed Mar 14, 2018 11:24 pm
Forum: Software
Topic: ZX81CRSS.ASM
Replies: 12
Views: 5228

Re: ZX81CRSS.ASM

I wonder if it will be possible to put the 10 line (RAND USR) in the printer buffer, and assign the NXT_line to the prt buffer! I believe back in '05 we discussed using the print buffer and that it is nulled out when you load the program. Putting ML code outside of the the program lines get clobber...