Comments (11)
I'm sure it's possible, just takes time and physical access to HW.
from c2t.
I have the HW, but have little knowledge about MPF-II modulation scheme. Do you have an idea where to start from?
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connect it to audacity (FOSS, but perhaps get an older version now since there's spyware in the latest version, you'll have to google for tips on getting a non-spyware version), write some data, look at the waveform
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Yep, I did it, it looks like there is 1 kHz of pilot signal, followed by probably frequency modulated signal (I see 2 periods of waves).
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Looks like zeros and ones to me.
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Hi, I just found from the manual, that MPF-II supports saving data to cassette in Apple-II format:
However, I'm not sure how compatible that format with an actual Apple-II format. Could you kindly take a look in to attached zip file, where 8 bytes ( 0400: 89 91 00 00 00 00 00 00
) have been stored to audio files (8-bit uncompressed PCM) from the real MPF-II computer? I was trying to generate the same mon's bytes to Apple-II .wav file with c2t, but MPF-II was not able to load that file.
from c2t.
- I've converted Hello World monitor dump in to Apple-II .wav with your utility:
0400: A2 00 BD 11 04 C9 FF D0
0408: 01 60 20 ED FD E8 4C 02
0410: 04 C8 C5 CC CC CF A0 D7
0418: CF D2 CC C4 8D FF FF 00
c2t-96h.exe -2 hellow.mon,400 hello.wav
- Then I converted .wav file in to 1-bit .BAW file to use it with ZX-Taper (a digital "tape recorder" on AVR).
- Loaded .BAW file to MPF-II and run it:
CALL -159
400.41FRA
400G
from c2t.
excellent news
from c2t.
Thanks!
By the way, do you know, is there a way to decode BASIC .wav file in to a text listing?
from c2t.
First you need to find a tool that will convert a basic binary dump to text listing. I do not know of any. Then you'll need to create a tool to read a wav and do the zero crossing detection so that you can extract the binary data for the 2nd tool; that should not be too hard, look at minimodem source as an example.
from c2t.
Yep, I guess such converter (BASIC binary to text) is a main problem. So, basically it should be a complete BASIC interpreter on a PC, able to load and list the program text.
About .WAV file - I'm using 1-bit .BAW format with ZXTapeRecorder2 device, it works very reliably with MPF-II (after HW modification of MIC port). My guess is that 1-bit format should be relatively easy to convert into binary dump.
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Related Issues (16)
- WARNING: simulated inflate failed at 1000 HOT 3
- programs fails to compile under Linux HOT 1
- [Build error] cl65: Don't know what to do with `100' HOT 4
- 23kbps is possible HOT 10
- INCLUDES report as missing HOT 1
- How to product 'gameserver' like .wav files from .dsk files? HOT 2
- Create WAV files that do not write disk? HOT 2
- Support for AppleSingle input files HOT 5
- Web-based option w/emscripten HOT 1
- Instadisk not working. HOT 12
- c2t-96h fails, 8000 c2t works HOT 5
- Enable more warnings HOT 1
- not able to compile in ubuntu linux HOT 2
- Build errors on Linux HOT 3
- Can a ProDOS formatted Insta-disk be produced with c2t? HOT 3
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