Sinclair ZX80 / ZX81 / Z88 Forums

VB81 XuR updated. Visual Basic released to 29-02-14. http://zx81.vb81.free.fr/ New Hardware: Vtr/Mageco based on the SPO256-Al2 NARRATOR speech engine. DOC&wirring diagrame: http://www.silicium.org/forum/viewtopic.php?f=43&t=35312 Good! I built a speech engine using the same chip in 1986, see p 19 ...

I have tried to make the equivalent of C's ternary operator in ZX81 BASIC. B-(B-A AND L) was the most effective replacement I could find for L?A:B in C. Could it be improved? http://www.df.lth.se.orbin.se/~mikaelb/sinclair/zx81/mob-i-l/ternary.png http://www.df.lth.se.orbin.se/~mikaelb/sinclair/zx81...

Thanks for restoring the tape. There are a lot of spelling-errors in the data but this is probably due to the bad tape. I think this program is slightly improved over the earlier glosa.p and it contains data. It's used to exercise a word-list from a chapter from an English-textbook for Swedish speak...

I have sampled one bad cassette tape (170 MB) but it probably doesn't contain any ZXForth-screens:
viewtopic.php?t=908

I have another even larger file that is equally bad but I haven't uploaded that yet.

I have a ZX81 WAV-file that I cannot convert to a digital TZX-file using EightyOne: http://www.df.lth.se.orbin.se/~mikaelb/sinclair/zx81/mob-i-l/tzx/week-end_at_cwm_tatws.wav (i.e. week-end_at_cwm_tatws.wav in http://www.df.lth.se.orbin.se/~mikaelb/sinclair/zx81/mob-i-l/tzx/). It sounds OK but in EO...

Unfortunately I don't have the missing ZX Forth screen of Convoy Bomb because when I saved it 30 years ago I had the wrong contents of my ramdisk in screen #2. All copies on that tape contain the wrong screen (some plot-commands instead of the definition of skepp i.e. ship). If I'm lucky I might fin...

TzxManager didn't work for the ZX FORTH-files in a TZX-file. They became smaller. This probably related to that when making p-files you remove the name, but FORTH screens (i.e. data blocks) doesn't have a name and should be saved completely (i.e. 1028 bytes in the ZX FORTH case). Now I solved this p...

I discovered TzxManager and that works for me, although I now have to extract the binaries using right click on every block.
http://dskcenter.free.fr/zxtools.html

Hi, I need to convert tzx-files with several programs into equally many p-files (for use in e.g. the Zed Ex-emulator for Android). In Eightyone you can only convert to p-file if it only contains one program. BTW I sampled all my ZX81-cassettes now. Sometimes there were errors and I need to test whic...

I've tested a ZX Spectrum BASIC line in ZX81 BASIC and I had to make some modifications in order to get it to run. The line 'PRINT VAL "VAL ""VAL """"2"""""""' is from ch. 9 in the ZX Spectrum BASIC Programming manual and it can only be typed in in Spectrum 48K or earlier (e.g. not in Spectrum 128K ...