.81 files to .p file anyone ???
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- Posts: 79
- Joined: Tue Aug 04, 2020 6:26 pm
.81 files to .p file anyone ???
Hi everyone. Does anybody have a way of converting .81 file downloads to .P files? I've only used an android tablet, and phone, to download stuff but I'm able to get everything to SD for both the DZXuino and DivMMc future, as well as the PlayZX app of course. Just need help with these stubborn .81 files! Cheers.
ZX80 (white psu)
Issue 1 ZX81
32k comp mod ZX81 filesixty keyboard
Issue 1 Spectrum
Issue 2 Specrum
Toastrack
Issue 3 in Lo-Profile keyboard
Harlequin 128
DivMMC future
vdrive
TZXduino
ZX printer
Alphacom printer
Issue 1 ZX81
32k comp mod ZX81 filesixty keyboard
Issue 1 Spectrum
Issue 2 Specrum
Toastrack
Issue 3 in Lo-Profile keyboard
Harlequin 128
DivMMC future
vdrive
TZXduino
ZX printer
Alphacom printer
- 1024MAK
- Posts: 5141
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Re: .81 files to .p file anyone ???
Apart from the filename, they should be the same format. However see also the details in this document
Mark
Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
-
- Posts: 79
- Joined: Tue Aug 04, 2020 6:26 pm
Re: .81 files to .p file anyone ???
Thanks for that Mark, and the attatched document. Thing is, the DZXuino doesn't like .81 files so they must be stored or read differently? I'm just getting going so forgive my ignorance. These things certainly get a grip after 39 years!
ZX80 (white psu)
Issue 1 ZX81
32k comp mod ZX81 filesixty keyboard
Issue 1 Spectrum
Issue 2 Specrum
Toastrack
Issue 3 in Lo-Profile keyboard
Harlequin 128
DivMMC future
vdrive
TZXduino
ZX printer
Alphacom printer
Issue 1 ZX81
32k comp mod ZX81 filesixty keyboard
Issue 1 Spectrum
Issue 2 Specrum
Toastrack
Issue 3 in Lo-Profile keyboard
Harlequin 128
DivMMC future
vdrive
TZXduino
ZX printer
Alphacom printer
Re: .81 files to .p file anyone ???
Yes, it true !
The ".81" is a "P" file with a tape name header !
In fact, is the RAW wav file, generated by a Save command.
The "P" take his name from the DOS name, the ".81" get his name form the file (not displayed in the file).
Example:
.P = myprograM [memory DATAS]
.81 = [memory DATAS]
Just cut the ZX string to the fist character > 128 (inverted !)
And save the end has "P" file.
But, all of emulators seem to read a 81 has a P file.
Just rename your 81 file to a P file…and the emulator will reconstruct the P file name as a tape file.
If this renamed file don't run, just add a 128 character before your file.
The ".81" is a "P" file with a tape name header !
In fact, is the RAW wav file, generated by a Save command.
The "P" take his name from the DOS name, the ".81" get his name form the file (not displayed in the file).
Example:
.P = myprograM [memory DATAS]
.81 = [memory DATAS]
Just cut the ZX string to the fist character > 128 (inverted !)
And save the end has "P" file.
But, all of emulators seem to read a 81 has a P file.
Just rename your 81 file to a P file…and the emulator will reconstruct the P file name as a tape file.
If this renamed file don't run, just add a 128 character before your file.
Last edited by XavSnap on Tue Jan 12, 2021 8:26 pm, edited 1 time in total.
Xavier ...on the Facebook groupe : "Zx81 France"(fr)
- 1024MAK
- Posts: 5141
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Re: .81 files to .p file anyone ???
As there are slight differences, maybe the software for the DZXuino does not take account of these differences?
Do the files you want load in an emulator?
Mark
Do the files you want load in an emulator?
Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
-
- Posts: 79
- Joined: Tue Aug 04, 2020 6:26 pm
Re: .81 files to .p file anyone ???
Not tried an emulator, not realy my thing. I'm going straight from the DZXuino to a physical machine.
ZX80 (white psu)
Issue 1 ZX81
32k comp mod ZX81 filesixty keyboard
Issue 1 Spectrum
Issue 2 Specrum
Toastrack
Issue 3 in Lo-Profile keyboard
Harlequin 128
DivMMC future
vdrive
TZXduino
ZX printer
Alphacom printer
Issue 1 ZX81
32k comp mod ZX81 filesixty keyboard
Issue 1 Spectrum
Issue 2 Specrum
Toastrack
Issue 3 in Lo-Profile keyboard
Harlequin 128
DivMMC future
vdrive
TZXduino
ZX printer
Alphacom printer
- chernandezba
- Posts: 205
- Joined: Tue Mar 11, 2014 4:30 pm
Re: .81 files to .p file anyone ???
Just rename the extension, the files are exactly the same
Re: .81 files to .p file anyone ???
NO !exactly the same
Xavier ...on the Facebook groupe : "Zx81 France"(fr)
Re: .81 files to .p file anyone ???
The 81 is a memory dump , create and saved from the Basic memory room.
The Z81 format save all the memory and registers.
The P format was (is) the tape dump format !
The "P" file is an "Xtender" format.
10 PRINT "HELLO WORLD" on EO… SAVE "HELLOWORLD" … it save a tape file!
The problem in EO, it save the .81 to a wrong P format based on a reconstructed DOS name…
i reload the famous P file !
EO use to load .81 and add the header to retrive the P file format !
But, it's NOT the same format, there's no name header in the 81 files...
81 file contant start after les ZX name…
The Z81 format save all the memory and registers.
The P format was (is) the tape dump format !
The "P" file is an "Xtender" format.
10 PRINT "HELLO WORLD" on EO… SAVE "HELLOWORLD" … it save a tape file!
The problem in EO, it save the .81 to a wrong P format based on a reconstructed DOS name…
i reload the famous P file !
EO use to load .81 and add the header to retrive the P file format !
But, it's NOT the same format, there's no name header in the 81 files...
81 file contant start after les ZX name…
Xavier ...on the Facebook groupe : "Zx81 France"(fr)