Sinclair ZX80 / ZX81 / Z88 Forums

EightyOne v1.18 is now available from SourceForge . The headline features are: - Significantly improved timing accuracy of ZX81 SLOW mode. This used to run about 12% faster than it should. It is now near 100%. - Pseudo hi-res ZX81 displays would appear with the top line a couple of pixels to the rig...

Link to the quieter recordings below though. Thanks. I'll try to dig out the actual tape to take a pic of the label too. Are these recordings all from this tape? https://sinclairzxworld.com/viewtopic.php?p=38772#p38772 tk3 contains R09_0007.wav and R09_0008.wav tk4 contains R09_0006.wav and R09_000...

XavSnap wrote: ↑Tue Aug 04, 2020 5:29 am Seem corrupt…
TAPE VERIFY.P

Here's the assembly listing for machine code of the Tape Verify program. It appears to be fine with no sign of corruption:

willinliv wrote: ↑Thu Aug 06, 2020 2:06 am However still no joy with that GM compiler tape - ZX81 signals really hidden in noise.

Still worth re-recording it and posting it here as might be possible, and maybe try a different cassette player. It might be better than before and might allow some information to be recovered.

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I created wav files using 3 methods: - MADN_A = Type SAVE "MADN" and record using the Wave Manager - MADN_B = Auto-convert from the Tape Manager - MADN_C = Create using the WinTZX utility The main difference seems to be the spacing between bit encodings. The first few bit encodings of each wav file:...

Moggy wrote: ↑Tue Aug 04, 2020 11:36 pm Found it here.

http://archive.sundby.com/mirror/www.wo ... ities.html

This later version also supports the ZX80:

I can create a .wav file but it cannot be loaded into a real TS1000 or a real ZX81. All other .wav files that were created by EightyOne (about 8 of them) work with no problem. When I convert this particular one (the one for madn.bas) using an old 1999 tool, ZXC.EXE (which created a .RAW and then Au...

bwinkel67 wrote: ↑Tue Aug 04, 2020 2:58 am Anyone else have load issues with digitally generated WAV files from EightyOne.

Do you mean you can't create create a .wav file, or you can but it won't load into a real ZX81?