Sinclair ZX80 / ZX81 / Z88 Forums

@Moggy Thanks for the PDF and the tips. I saw a lot of demos that were cross-compiled on desktops and the speed possible with this thing is surprising. All I've read about Forth really is it's closer to machine than BASIC and so much faster, and at this time the only working chip on my board until I...

Thanks for those pictures draketungsten, question answered. :D With the copied emulator ROM there was always a display problem insofar as the display was too far to the right and the inverse "mask" didn't stretch across the full width of the display leaving half a chr un-inverted, yet works perfect...

mrtinb wrote: ↑Sat Jul 22, 2017 9:12 pm

draketungsten wrote: ↑Sat Jul 22, 2017 8:58 pmI found a PDF for ZX-Forth but I'm not sure if that translates well to a Tree-Forth ROM...

Tree-forth manual is posted here: viewtopic.php?f=11&t=459#p4087

Ah thanks for that!

Gladly! Unfortunately the stock ROM doesn't seem to boot with the Kradle connected, but it does boot by itself. I just get a white screen. I'll do some digging around to see what that means but I was hoping the problem was not enough power but I have it hooked up to 9V 1.2A. I also tried 12V with no...

God that's nice!! 8-) @ draketungsten I notice you're running what looks like an original treeforth EPROM. Could I ask a small favour? Could you compile and run the following and post a screen shot please? ED OFF CO REV : z 1000 0 do i . loop ; I've never come across an original Forth EPROM before,...

The keyboard ribbon split almost the moment I pulled on it a bit to inspect it. It'll have to wait until I get my new power supply...

As soon as I get my correct power supply I'll do that. Right now all I have is my Atari 2600 power supply which tops out at 500ma. It's enough to make the base board work, but apparently not enough to run the Kradle. I've read that 1200ma is a good value to hit to give enough power. I'm guessing the...

Just realized I didn't take pics of the outside. Attached.

Received the unit today and took some pictures. It adds a lot of heft, a snappy keyboard (looks like rubber domes) with extra useful keys, a single joystick port, a peripheral port, and supposedly extra memory. It came with a modded Timex 1000 (old composite mod and TreeForth ROM daughter board) but...

Has anyone heard of this device? The only thing I can find online is from http://www.worldofspectrum.org/timex/ showing a fairly low resolution ad scan: http://www.worldofspectrum.org/timex/kradle.jpg From what I can make out it's basically a mod case that you swap your Timex 1000 board into and it ...