Search found 143 matches

by Bill B
09 Feb 2019 15:47
Forum: GENERAL DISCUSSIONS
Topic: [MAME] Emulating the MTX
Replies: 17
Views: 2373

Re: [MAME] Emulating the MTX

F: is usually a RAM disk not a Silicon Disk. It uses the pages above 64K on the MTX. So you should see activity on the page port (0x00) not on the Silicon Disk I/O ports. SIDISC formats both RAM disk and Silicon disks.
by Bill B
01 Feb 2019 10:40
Forum: SOFTWARE
Topic: New tape cleaner tool
Replies: 36
Views: 1506

Re: New tape cleaner tool

At this point I retire from tape cleaning and move on to something else. Attached is the latest version of my program. It has some additional scanning modes. It also the ability to manually edit the pulses. To do so: Choose a scanning mode and parameters to do the best you can in interpreting the fi...
by Bill B
01 Feb 2019 10:26
Forum: SOFTWARE
Topic: New tape cleaner tool
Replies: 36
Views: 1506

Re: New tape cleaner tool

Patience.png A last one from me. I never managed to fully read the audio files for Patience. They have relatively large system variables blocks, in which I invariably drop bits. However I think I managed to read the Basic block (with some manual editing of the pulse train). I then turned this into ...
by Bill B
25 Jan 2019 21:05
Forum: SOFTWARE
Topic: New tape cleaner tool
Replies: 36
Views: 1506

Re: New tape cleaner tool

If is anybody else wants to have a play with TapeView, source code and compiled (Linux x86) version attached. It should be possible to compile for RPi (easy) or Windows (more work required), although I have not done so. Some cautions: The code is not well structured, it just grew. It is not commente...
by Bill B
25 Jan 2019 20:57
Forum: SOFTWARE
Topic: New tape cleaner tool
Replies: 36
Views: 1506

Re: New tape cleaner tool

SandL.png
SandL.png (8.29 KiB) Viewed 135 times

One more success. This is a program in Basic.

The remaining files are proving more challenging.
by Bill B
24 Jan 2019 18:49
Forum: SOFTWARE
Topic: New tape cleaner tool
Replies: 36
Views: 1506

Re: New tape cleaner tool

Another one loads :D Composer001.png Composer002.png Composer003.png Again, it needs somebody to test it and make sure it is all working. Also, I think instructions will be required, Paul do you have any? The audio file contains four programs: "SCREEN", "PANEL64", "SCREEN" (Again), "MANU64". The two...
by Bill B
23 Jan 2019 19:19
Forum: SOFTWARE
Topic: New tape cleaner tool
Replies: 36
Views: 1506

Re: New tape cleaner tool

Doing threshold crossing on the slope of the original signal (lower curve) effectively picks out the peaks and troughs of the original values (upper curve). This seems to give some results. This audio file seems to contain at least four programs "INTERUPT" "2*INTERUPTS", "INTER4" and "INTER5". My ve...
by Bill B
22 Jan 2019 21:57
Forum: SOFTWARE
Topic: New tape cleaner tool
Replies: 36
Views: 1506

Re: New tape cleaner tool

A not so nice case, Spot the missing data bit :( This is why I thought visualisation would be helpful.

TapeView002.png
TapeView002.png (49.76 KiB) Viewed 135 times
by Bill B
22 Jan 2019 10:30
Forum: SOFTWARE
Topic: New tape cleaner tool
Replies: 36
Views: 1506

Re: New tape cleaner tool

A work in progress. In order to make any progress on the remaining audio files I felt I need to be able to see what I am doing. I am therefore developing a "TapeView" program which can display the audio signal as well as decode it. Below shows testing on one of the files I had already made progress ...
by Bill B
01 Jan 2019 15:23
Forum: SOFTWARE
Topic: New tape cleaner tool
Replies: 36
Views: 1506

Re: New tape cleaner tool

Martin A wrote:I've been sidetracked by another hardware project.
So "spill the beans", your projects are always interesting.