Sinclair ZX80 / ZX81 / Z88 Forums

The TZXDuino looks like an interesting device. I didn't know it existed. I did make my own SD to wav device with a Propeller chip and another with a small touchscreen and an Arduino Due. Mine handled .o, .p, .80 and .81 files. Sadly I lost the code for them in a hard drive crash :(. I went to the gi...

I found a Windows 10 app version of Quicklook and also found that is in git. It would be interesting to see if I could add the plugin into a fork of the Windows 10 Quicklook.

I'm working on a Ring Tone Jukebox program for Bean's ZXGame. Hopefully it'll be ready early next year Then after that I want to do something to commemorate the 40th anniversary of the ZX81 in 2021. I have a couple of ideas Software: Take Grok's VB81 and upgrade it to C#. Hardware: See if it is poss...

Thanks mrtinb. I went to the Way Back Machine and sadly when I clicked on the commented Mazogs disassembly link I got an URL not archived error. I believe the downloads for the programs are good but the downloads to the disassemblies are broken and that is what I was after.

I noticed that fruitcakes's site http://www.fruitcake.plus.com is no longer up. There was a lot of great info and downloads on it. Has anyone archived or copied the flicker free games and the dis-assemblies of Mazogs and the other games?

Grant,
Thank you for all your hard work and dedication to your site. I find it very informative and had a lot of fun porting your Mult-Comp over to my DE0-Nano

Bean, I would be interested in Reference Card for the ZX80 ZX81 (Yellow Foldout) by Nanos Systems ZX81 Assembly Instructions (Fold Out) Timex Sinclair Interfacing,James M. Downey & Don Rindsberg,0-13-921742-8 Control Things with your Timex Sinclair,Robert L. Swarts,0-88056-127-0 Mastering Machine Co...

I found a link to a pdf of a book that contains Z80 routines and a description on how to use assembly language that may be helpful. http://www.bitsavers.org/pdf/osborne/bo ... s_1983.pdf

Thanks all, I did change the JR To JP P. I forgot about the conditional JP :oops: The Line-ADDR Routine does look helpful but I got my routine working with my code so I'll keep it as is. My idea is to use REM lines for DATA. Each REM will have RTTTL data for use with the ZX-GAME in it. From that I w...

I'm writing a program and the first step is determining where REMS are in the program so for the first step I wrote READPRG: LD HL, STARTPROG REMLOOP: INC HL // Bypass line number INC HL LD A,(HL) // Get length of line LD C,A INC HL LD A,(HL) LD B, A DEC BC // Adjust for HL to read first token INC H...