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  1. ALTAIR 4.0 8K basic initialization question...

    Is there a way to hot start basic where you can change the IO ports for input but not erase the program in memory or be prompted for mem size and stuff like that?

    Thanks,
    Corey
  2. Thanks... I think the supply is actually working...

    Thanks... I think the supply is actually working now that I put a bulb load on it, so I may not need to actually troubleshoot it. I guess the power connector was the "broken" part of the supply and...
  3. One more question... Can I use the bulb to bleed...

    One more question... Can I use the bulb to bleed down the caps... I've only used real bleeders in the actual circuit.
  4. Should have just emailed you directly... I do...

    Should have just emailed you directly...

    I do have a 12V bulb setup I have been working on for my OP-80, I'll just repurpose it for now to be a test load.
  5. Testing and Repairing early Apple II (Silver) power supplies

    So I am restoring an Rev-0 Apple II supply for someone.

    I was told it wasn't working and It was missing the power connector, so I replaced that. I opened it up (it already had screws, I know...
  6. All the guts have been changed out... It's not...

    All the guts have been changed out... It's not using Rev0 motherboards or power supply. CPU board is also different.
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    I have an Amscope Trinocular microscope with a...

    I have an Amscope Trinocular microscope with a Barlow lens. I got a really good deal on it from a store that was going out of business. It has an articulating arm bolted to my workbench so it can...
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    Xerox...

    Xerox...
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    I guess they setup this "sale", get a bunch of...

    I guess they setup this "sale", get a bunch of purchases and then close the account that is used for payment before all the refunds can be processed. Then eBay is out the money because they refund...
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    If the MM5740 chips work then yes there is a...

    If the MM5740 chips work then yes there is a market. I’d be willing to buy a few if they do work. I have bought plenty that don’t.
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    Looking for 1 Mylar punch tape rolls

    I think the title says it all. I need some Mylar punch tape. I have plenty of the oiled paper kind, but I need to create some master tapes that will hold up a bit better than paper for a museum...
  12. OK, plan might change in the short term. I found...

    OK, plan might change in the short term. I found a SSM IO-4 board in our warehouse. I was able to spend some time digging though boxes in our S100 section that should have not had cards, but did.
    ...
  13. I currently use a high speed paper tape on my...

    I currently use a high speed paper tape on my personal Altair running though the 3A's extension port. it's rather dumb and really only pushes the data over to the main serial port. I usually...
  14. I think I decided since this is for an exhibit at...

    I think I decided since this is for an exhibit at the VCF museum that I'll hook up the OP-80A to a UART (should be simple to wire up since it's only input) and plug it into the back of the ADM3A...
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    I just looked at all my Sol's, forgot that hole...

    I just looked at all my Sol's, forgot that hole was there....
  16. Ok so if I use 8K basic, is 1140h the address of...

    Ok so if I use 8K basic, is 1140h the address of the whole routine or the address to change the port for CLOAD?
  17. Patching CLOAD in MITS 4.0 4K or 8K basic for a different port

    Ok here is the dilemma, I’m working on hooking up an OP-80A to an ALTAIR. The challenge I have is the IO card on this machine is a 3P+S configured to look like an SIO-2 at ports 20/21. The problem...
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    I think there was an OEM who used the Sol for...

    I think there was an OEM who used the Sol for their HAM RADIO TTY setup. I forgot who it was but I do recall a cover like this with the holes drilled in the front panel.
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    Yep. You used the carrier to insert them...

    Yep. You used the carrier to insert them straight.

    The link you have is for a later version that looks like it used machines pins. The earlier ones were more squarish.
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    That’s not them. These were used before sockets...

    That’s not them. These were used before sockets became popular. My scelbi uses them for the 8008.

    I don’t remember who makes them, but I pretty sure it’s not molex.

    I’ll check my stash...
  21. Read my posting I did in the past about...

    Read my posting I did in the past about repainting a Sol-20 and my Helios, it's involved. Without the right equipment and technique it will not come out well. Most of those period cases have some...
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    Was there a sefl-running Lisa sales demo

    and if yes, does anyone have a copy. Need it for the VCF museum.

    Thanks,
    Corey
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    I agree Martin does great work. I have his 1702...

    I agree Martin does great work. I have his 1702 programmer and have his 5204 programmer, but I have yet to built it. I needed the 1702, so I built that one as soon as I got it. I really need to...
  24. For the paper logo, I had the professionally...

    For the paper logo, I had the professionally reproduced on magazine paper so it matches perfectly.

    For the paint, I had it custom mixed to match. It is specifically made for painting metal. ...
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    PT used whatever was the cheapest EPROMs they...

    PT used whatever was the cheapest EPROMs they could get. They had a 2708 version of the personality module which could have one actual ROM chip with a jumper change or the two 2708. I have one of...
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