Sinclair ZX80 / ZX81 Forums

holy crap this was awesome. How did you manage this? Basic? Machine code?

It’s a bit more complex. PAL and NTSC colour encoding are different requiring different crystals and in some cases different encoding chips (depending on which chip type was used). Plus the timing of the vertical and horizontal elements of the display are different. So changes inside the ULA (diffe...

All i get is a repeated listing of RVC player V0.4 over and over again.

mrtinb wrote: ↑

Mon Dec 23, 2019 10:32 pm

Moggy wrote: ↑

Sat Sep 09, 2017 11:14 pm

UDG board owners please set to 128 and for Eighty one users make sure CHR$16 is set and ZXpand mode on.

much obliged

Where can i find more info on programming the Jupiter ace and it's version of Forth?

mrtinb wrote: ↑

Mon Dec 23, 2019 9:19 am

Crayon21 wrote: ↑

Mon Dec 23, 2019 3:30 am

can't find the download for UDG128

You need both ZXpand and a UDG128 device like Andy's UDG4ZXpand.

i'm using the eightyone emulator

The snowman was a favourite when I was much younger, but my memory clocked it at far less than its 25 minutes. I still enjoy the story and style of the movie, even when played on the ZX81 :D So here is a ZX81 video player and file to watch the film in all its monochrome glory. As usual, UDG128 and ...

I know the main motive was cost, but not a lot of families in NA could afford a C64 and would chafe at a TS1000, so it would've been nice to have the option of a American version of the Spectrum. So why didn't this happen, scratch that, why do i need to convert PAL to NTSC? Why not just have an inte...

Lardo Boffin wrote: ↑

Sat Dec 07, 2019 10:16 am

Check out this site.

http://www.zx81stuff.org.uk/zx81/tape/0

They've been hiding this gold mine for how long?

I'm sorry, but everytime i see your name i imagine this as the picture

Not knocking you, it's just so funny