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Type: Posts; User: dave_m

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  1. Replies
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    Hutch, You are right. It looks like they are...

    Hutch,
    You are right. It looks like they are scarce. Still some on ebay but only cheap ones are from China.

    There are 11 available from Quest Components in California but they want $30 each!...
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    When you get the IEEE bus working, be sure to...

    When you get the IEEE bus working, be sure to learn the advanced features of the SD2PET. It supports subdirectories on the SD card. So instead of having one directory with a hundred programs which...
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    Carl, Welcome to the Vintage Computer Forum. ...

    Carl,
    Welcome to the Vintage Computer Forum.

    Your troubleshooting method is sound. Replace the MC3466 part with equivalent device.
    -dave_m
  4. Great work! Will that eliminate the need for tape...

    Great work! Will that eliminate the need for tape altogether? Or will you need to find a way to save data and programs?
  5. Replies
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    Hi Greg, You found a problem at H5. Check that...

    Hi Greg,
    You found a problem at H5. Check that H5 pin3 is getting a good Phase 2 clock. It may be open.

    Yes, 16 MHz is the clock into the serial in-parallel-out shift register, the outputs of...
  6. Replies
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    2,181

    This is very impressive project.

    This is very impressive project.
  7. Replies
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    Greg, That disassembly is for BASIC 1. You need...

    Greg,
    That disassembly is for BASIC 1. You need BASIC 2. Does anyone have a disassembly listing for this version?
    -Dave
  8. Replies
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    Hi Mike, Please tell us a little about the 1541...

    Hi Mike,
    Please tell us a little about the 1541 interface. Is it all done in firmware? Does it have its own ROM on the AIM65? Does it support only SAVE and LOAD or does it also do .seq files, etc?...
  9. Replies
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    Daver, I like to play 'junior coder' with your...

    Daver,
    I like to play 'junior coder' with your test routines. I always learn something. I noticed you used the zero page instructions with the LOAD and STORE Memory instructions instead of the...
  10. If that does not help, there are separate pins...

    If that does not help, there are separate pins from the drivers that go to the connector so it is possible that there is a bad transceiver signal at the connector. Repeat data bus test with 55/AA hex...
  11. Use a good contact cleaner or if you have some...

    Use a good contact cleaner or if you have some pure isopropyl alcohol (95%) that may be OK. Don't forget to clean both sides of the edge connector. Do not use a ruby rubber eraser. Commodore used...
  12. Thread: Petsd

    by dave_m
    Replies
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    2,075

    OK, that would be useful. But are you able to run...

    OK, that would be useful. But are you able to run the Waterloo 6809 code without SuperOS9 on the SuperPet? That is, run Fortran, etc without SuperOS9?

    Also I think to run the SuperPet, the disk...
  13. 66065 66066 66067 DAV Test - lines 10-80...

    66065

    66066

    66067

    DAV Test - lines 10-80 plus 400 and 500
    NRFD Test - lines 90 -160 plus 600 and 700
    NDAC Test - lines 170 - 240 plus 800 and 900
    ATN Test - lines 250 - 320- plus 1000
  14. Your data path seems OK so you may only need the...

    Your data path seems OK so you may only need the IEEE control lines test. I'll post the listings for that test. You would need to type a few lines at a time for each control line.
  15. Thread: Petsd

    by dave_m
    Replies
    25
    Views
    2,075

    Is the php script available? Does it go into the...

    Is the php script available? Does it go into the same directory as the PET program files? This feature sounds very useful. LOAD "program_name", 10 and whoosh, a PET program downloaded from the ether...
  16. Thread: Petsd

    by dave_m
    Replies
    25
    Views
    2,075

    Right now only SAVE and LOAD commands, but he is...

    Right now only SAVE and LOAD commands, but he is looking into adding DOS Wedge shortcut commands. He is also looking into a wifi interface where one can download (LOAD) program files from an internet...
  17. Slightly better test patterns would be 170 and...

    Slightly better test patterns would be 170 and 85. They are alternating bit patterns. 170 decimal = AA hex = 10101010 and 85 decimal = 55 hex = 01010101.

    Can you input from tape? I have a couple...
  18. Possible uses of VIA timer: cursor blink,...

    Possible uses of VIA timer:

    cursor blink, repeat key, power on chimes, IEEE and Cassette time outs...
  19. Replies
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    I liked the video. The only thing I remember from...

    I liked the video. The only thing I remember from attending the 'NOVA Maintenance class for users' in the mid 70's was that if a bulb in the tape reader goes out, you can substitute with a bulb used...
  20. Yes, it is important to start with a newly...

    Yes, it is important to start with a newly formatted floppy. With BASIC 4 look up the Header Command.
  21. yes, it was the jannie thread and the IEEE stuff...

    yes, it was the jannie thread and the IEEE stuff starts about message #90.
    http://www.vcfed.org/forum/showthread.php?76862-Faulty-8032-SK-with-no-V-Sync-Gary

    Before I'd do anything i would check...
  22. OK off we go! With a Commodore drive, always...

    OK off we go!

    With a Commodore drive, always remember to to remove the floppies when power is applied or turned off or you can corrupt the floppy.
  23. Mike, my CRTC is not on a socket. Someone else...

    Mike,
    my CRTC is not on a socket. Someone else will have to volunteer to do the test.



    I had both of those units back in the day (1980). Now I have only a 2040 that has been upgraded to 4040...
  24. Good summary. To be safe I will not use a 6845 in...

    Good summary. To be safe I will not use a 6845 in a PET. I wonder if anyone out there has a Motorola 6845 in their PET computer?
  25. Wow, congratulations on a job well done! Did...

    Wow, congratulations on a job well done!

    Did we have two bad 6845's or were they incompatible??? I personally never heard of an incompatible 6845 in a PET. I'm going with two bad chips.

    Please...
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