Sinclair ZX80 / ZX81 / Z88 Forums

How about this...

It is 7 or 4 right?

So this one is 7,4,7,4,4,4,4,7,4,4 (per mrtinb) 9,4,9,4,4,4,4,9,4,4

Bits ser 4 or 9 pulses according to these docs. http://problemkaputt.de/zxdocs.htm#zx80 ... ttesignals

Yes, that is what I've been doing gammaray. "Periodic analysis"--looking at the size of the bits in the dropout, and then overlaying a "healthy" 4 or 9 bit pulse to replace them. Sometimes I can't really tell how the area should have looked, and then it becomes an "educated guess" at where the valleys are. The one illustrated was eventually repaired; I don't remember what the actual bits were in that instance.

Working now on Jørgen's 2nd upload of 17 more programs. Whew boy. Some of them fly straight with only a few "universal" shaping commands, others require that "bit level surgery" to get right. It's been a lot of work, but interesting.

Hmm, zip file of 14 more programs is too large to upload here. I'll put it in my dropbox for a time. Anyone who want them can download with this link: https://www.dropbox.com/s/4f2o8wgy6ui5z ... e.zip?dl=1

The other 3 are giving me grief.

I suppose the "dropout" vary widely in their character... yikes!

Using a sinusoid on these dropouts indicated start and stop.

Backgammon.wav [*]
Kampvogn.wav [*]
Kaenguro.wav [*]
Lysavis.wav [*]
Maanelanding.wav [*]
Slangen.wav [*]
Program 1.wav [Martin]
Program 2.wav [Martin]
Program 3.wav [Martin]
Program 4.wav
Program 5.wav
Program 6.wav
Program 7.wav
Program 8.wav
Program 9.wav
Program 10.wav [*]
Program 11.wav [*]
Program 12.wav [*]
Program 13.wav [*]
Program 14.wav [*]
Program 15.wav [*]

backgamon.p
JP.P
KAENGURU.p
Kampvogn.p
Lysavis.p
maanelanding.p
prg10_JP.p
prg11_TEGNING.p
prg12_Lysavis.p
prg13_TEGNING.p
prg14_Uhyrer.p
prg15_tolprogram.p
Slangen.p

I have more tape’s but i need to repair them, the first tranperent part before the real tape is broken, i will try to fix it and upload them.

It is great to see that it is possible to repaire some of the software, thank you for that.

Jørgen

I have now uploadet Biorytmer and Drive, I think Drive is missing the start of the program.

Jørgen

Backgammon.wav
    • Thread post Working in 2 emulators but not on real hardware
Biorytmer.wav
Drive.wav
    • Thread post
Kaenguro.wav
Kampvogn.wav
    • English: Tank Thread post Seems working
Lysavis.wav
Maanelanding.wav
Program 1.wav
    • English: Joy Plot, Electric Organ, Graphics Thread post
    • Error at line 4340 (see inserted program listing in thread post)
Program 10.wav
Program 11.wav
Program 12.wav
Program 13.wav
Program 14.wav
Program 15.wav
Program 2.wav
Program 3.wav
Program 4.wav
Program 5.wav
Program 6.wav
Program 7.wav
Program 8.wav
    • Same as Program 1
Program 9.wav
Slangen.wav

Updating this post as programs gets fixed.

Sorry Jørgen, but actually both programs are missing the beginning of the file. I can do nothing with incomplete files.

Biorytmer looks like it may have been an accident in re-recording the clip to the computer. If so, then you can try that one again.

Ian