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  1. Don't know if this'll do exactly what you want...

    Don't know if this'll do exactly what you want but might be worth a look; lots of options.

    http://srecord.sourceforge.net/
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    Thanks, Dave, both for the link and also for...

    Thanks, Dave, both for the link and also for taking the time to write it (and the doc) in the first place!
    m
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    Hi DaveR, Sent you a PM but maybe you missed...

    Hi DaveR,

    Sent you a PM but maybe you missed it: I lost the address of your diagnostic ROM images, could you please repost them?

    TIA,

    m
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    Instead of a phone number you 'dial' the IP...

    Instead of a phone number you 'dial' the IP address, e.g.
    ATDTx.x.x.x.pppp or ATDTx.x.x.x/pppp

    https://www.lantronix.com/products/uds-10/#tab-docs-downloads
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    Jim Brain sells 6540 adapters on this side of the...

    Jim Brain sells 6540 adapters on this side of the big pond; if you can't program the EPROM there are reasonable commercial sources or one of the members here might volunteer to burn one for you.
    ...
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    Whew! Great work, guys!

    Whew! Great work, guys!
  7. Would love to see an actual circuit for a change...

    Would love to see an actual circuit for a change ;-) , esp. how you deal with the 'slot' timing issue; PM on the way.

    BTW, check that CD4053 data sheet again; they really are 3 x 2 to 1 muxes.
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    "ZERPOWER" ? Now there's a big clue... ;-)

    "ZERPOWER" ? Now there's a big clue... ;-)
  9. Boy, you really started something ;-) You...

    Boy, you really started something ;-)



    You should be able to do it with just a multimeter; assuming (another assumption ;-) ) the usual negative-going scan pulses, one of the groups...
  10. Aside from scanning the two matrices separately...

    Aside from scanning the two matrices separately it sure sounds a lot like my solution ;-)



    I think you're mixing up the 3189/3500 numbers, no? I think the 3500 is the one using a 'normal' 4x3...
  11. Duh; yeah, I saw my flaw in eeguru's #44 ;-) OK,...

    Duh; yeah, I saw my flaw in eeguru's #44 ;-) OK, back to the drawing board...

    But while I'm asking dumb questions, it looks like the rows and columns in eeguru's code are all outputs; how does...
  12. Sorry, I didn't mean to suggest that this is a...

    Sorry, I didn't mean to suggest that this is a better solution than the other ones proposed, just one that might work in a certain situation and be relatively simple. I should take it off to a...
  13. You always have to complicate things, Chuck ;-)...

    You always have to complicate things, Chuck ;-)
    Lots of diodes ;-)
  14. Well, we're assuming that as more or less a...

    Well, we're assuming that as more or less a hypothetical intellectual exercise; I think the OP has decided on a BASIC Stamp or similar. In fact we're only dealing with 12 keys, but how would you...
  15. Oops; sorry Dave, I missed this post of yours for...

    Oops; sorry Dave, I missed this post of yours for some reason.

    As I said, it depends; if the 3500's scan lines are 2, 4 and 6 it should be straightforward; create an address from the 8 lines of...
  16. It shouldn't; it might be worth while to clean up...

    It shouldn't; it might be worth while to clean up the card edge connectors with a soft eraser, spray the sockets with Deoxit or an equivalent contact cleaner and work the cards in and out a few...
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    Boy, this is another wide-ranging thread ;-) ...

    Boy, this is another wide-ranging thread ;-)

    Are you sure the PET is outputting a signal, that the monitor is correctly connected and that your scope probe is properly grounded?

    You should see...
  18. Thanks very much for the offer, but I'm OK with...

    Thanks very much for the offer, but I'm OK with the skewed scans. However, if you should scan them for your own use/pleasure I'd be interested ;-)

    Any specific covers that didn't work in VICE?
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    Right; the 4K BASIC2 ROMs are 901465-01, 02 and...

    Right; the 4K BASIC2 ROMs are 901465-01, 02 and 03 with 901447-24 2K CG (PET; CBM=901474-01

    Looks like the original set is indeed the original BASIC 1 set; the original $C000-$C7FF ROM was...
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    Screechy and 'halting' sounds like the cassette;...

    Screechy and 'halting' sounds like the cassette; try a better one.
  21. I'd say that the 'maze screen' shows that the...

    I'd say that the 'maze screen' shows that the monitor is OK and the video is working; it might be the 'normal' garbage screen without a character generator chip. Before you poke around inside the...
  22. Yes, there were 30 tapes and yes, I have them...

    Yes, there were 30 tapes and yes, I have them all, although I haven't checked recently whether they're still readable. There are several archives out there but at least one has some problems. The...
  23. I have all the tapes but I don't want to break up...

    I have all the tapes but I don't want to break up the set either; why not make cassettes from the images? That looks like 28 tapes; are some not Cursor tapes?

    Interesting about the covers; I'll...
  24. They're all here:...

    They're all here:
    http://www.zimmers.net/anonftp/pub/cbm/magazines/cursor/index.html
  25. :rofl:

    :rofl:
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