Sinclair ZX80 / ZX81 Forums

Somebody bid on it (ouch!) ... maybe a false tag from person selling it.

Document formatted by application? RTF? Probably not DOC. I'll start looking.

It is not RTF, RTF does not appear to have binary headers.

Is that "WhyWait" or "NoWait"? "WhyWait" is only 10% improvement. As Andy said, switching between 60Hz and 50Hz ... in real terms the speed increase up to 30% in SLOW mode. In the FAST mode it does not make any difference at all. If you are looking for a real speed-up solution, go for the modificati...

I wonder if a glass fiber reinforced polymer material is available and would it increase strength?

Good info! Thanks...

£/.7=$
£ x 1.4=$

Approximately.

I have an Aerco centronics !

But may I ask how do I get a centronics printer?

Sounds like someone with decent assembler skills would need to go after this one.

Addendum: The Futura 8300 was the unit for the U.S. so maybe it is built into the original ROM code/ULA to switch video?

Maybe someone can send me photocopies of the backside of the +, 128, +2,+3 (have I forgotten any?) with a hard measurement of some mounting holes in the X AND Y directions (to check for incongruent aspect ratio) so I can evaluate layout whether I can include them. Photocopying the back allows a rela...

Your Lambda is probably PAL?... and your ZX81 does PAL or NTSC based on... what is it PIN22 of the ULA? Using R30 pullup resistor? Lambda probably doesn't have that type of ULA...hmmm. ROM code changes on that maybe? https://k1.spdns.de/Vintage/Sinclair/80/Clones/Lambda%208300%2C%20Hong%20Kong/ROMs/...