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JGRAHAM2

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Posts posted by JGRAHAM2

  3. Posted

    59 minutes ago, flashjazzcat said:

    As far as I know, every XEGS used this keyboard. Only the Help key switch is used, but you may see rubber domes fitted for the four unused console keys.

    One did not have the plungers and the circuit boards were a different color.

    Of course someone could have replaced the keyboard with a fully populated XE keyboard....

  4. Posted

    13 minutes ago, flashjazzcat said:

    As far as I know, every XEGS used this keyboard. Only the Help key switch is used, but you may see rubber domes fitted for the four unused console keys.

    One did not have the plungers and the circuit boards were a different color.

     

    DC0F3A98-E2AC-4DAA-8B34-A1870A591B33.jpeg

  7. Posted

    2 hours ago, Nezgar said:

    D'oh of course... that OS is still so "new" to me it slipped short term memory. :) Still need to test that OS myself on real hardware and hopefully documentation turns up eventually.

    The thing to remember is you have to choose to boot from your SIO connected device, the same as you choose to boot from the ram disk.

  8. Posted · Edited by JGRAHAM2

    I used a dual dip switch and filed the existing toggle switch hole out to fit. I wanted to use my nibbler tool, but it it wouldn’t handle the thickness of the plastic. I haven’t secured it, but it is a press fit and seems secure enough as it is.

     

    C4808AFE-46F8-452C-976B-0F224D122100.jpeg

    DAA81501-E25F-438D-AD46-B84E790A2820.jpeg

    • Like 1

  9. Posted

    8 hours ago, _The Doctor__ said:

    looks like a 5 volt and ground pick off point... using machine pins for convenience...

    I bought this computer as a lot with some 1050s and a couple XLs from a guy’s son who inherited them. I wish I had asked what he did with them. I’m sure there is quite a story behind them. Two of them were upgraded with memory and the Expander OS that allows multiple RAM disks and to boot from one of them. Someone suggested a BBS in a post I have on this site.

  10. Posted · Edited by JGRAHAM2

    6 hours ago, Nezgar said:

    Technically it's 576K total :) (64+512) using portb bits 1,2,3,5,6, so no BASIC or separate ANTIC access to extended memory banks.

     

    The switch should reduce memory to 192K total (64+128) using only portb bits 2,3,6 - and restore BASIC & ANTIC functions.

     

    Curious to know what OS they programmed onto that EPROM.... care to dump it?

    It is the standard and the Expander OS. I have an XL with the same OS. I don’t know what he did with it. He had a very high socket of a type I’ve never seen for the OS. It looked to be high quality, but I couldn’t fit the 4 in 1 OS that I got from you under the keyboard. I removed it and replaced it with a precision socket. I had to add 4 bodge wires connecting to the BASIC ROM as I did damage the board removing it. (Works great, thanks!) It looks to me like this computer was wet at one time. See the picture of the lower shell.

     Posted a dump here: 

     

     

    E9C18559-4928-4595-8783-9D41653735D4.jpeg

    • Like 1

  14. Posted

    8 hours ago, bfollowell said:

     

    OK, I can definitely get that then. Sometimes the heart wants what the heart wants.

     

    If that's the case, why the post? Heck, it doesn't matter what any of us think. Do whatever you want that is going to make you happy and everyone else's opinion be damned. Go for it! I'm glad you're finally getting to fulfill that 1982 dream. It only took 38 years!

     

    I like the discussion. There is a story to my first 400. I bought it at a Montgomery Wards warehouse store. I learned BASIC on the machine and how to fix it when I broke it. (Actually, a bar code reader called Oscar broke the SIO.) It got me started in an IT career. Now I work in the building where I bought it.

    • Like 4
    • Thanks 1

  15. Posted

    21 minutes ago, bfollowell said:

     

    There are easier, and cheaper memory upgrade options for our 8-bits these days, even the 400/800 machines. If it were me, I think I'd go for a more modern upgrade, and save that upgrade as a collector's piece.

     

    That's just me though.

     

    I can see your point, but this was what I wanted to do on my first computer in 1982. I tried to buy the keyboard, but couldn’t find one. I couldn’t afford the memory upgrade. It is a nostalgic thing.

  16. Posted

    1 minute ago, JGRAHAM2 said:

    Need to clean it up, but it works 100%! That little board to the left was to press on the four wires from the Mosaic board to the back of the cart port. I didn’t like that so I soldered them.

    DBED842E-E258-48DB-A6C0-9E4AABAA2DAA.jpeg

    By the way, the keyboard was made by Cherry. I was surprised at that.

  19. Posted

    37 minutes ago, JGRAHAM2 said:

    So, after rechecking my soldering I confirmed the problem to be between the soldering iron and the chair. I had soldered wire “7” to pin 9 of the RAM chip instead of pin 8. Now it works with BASIC and other carts. It no longer works with the UNO cart. It also will not boot off of S-Drive Max OR FujiNet. PIA or Pokey?

    I found in another post on this site that you must use external power on S-Drive Max or FujiNet. I have both on the S Max and sure enough, it works!

  20. Posted

    So, after rechecking my soldering I confirmed the problem to be between the soldering iron and the chair. I had soldered wire “7” to pin 9 of the RAM chip instead of pin 8. Now it works with BASIC and other carts. It no longer works with the UNO cart. It also will not boot off of S-Drive Max OR FujiNet. PIA or Pokey?

  23. Posted · Edited by JGRAHAM2

    I have it working... kind of. Comes up as a black screen. If I hit reset, it will run a cartridge. It will even run the Uno cart. If I select a cart on the menu, it will start after another reset. Buck Rodgers will start without reset. Basic will produce a Ready prompt and will take input, but freezes after one line. It did all of this after I rotated the RAM chips. I believe it’s just a bad chip.

  25. Posted

    38 minutes ago, orpheuswaking said:

    You know, I have a spare Atari official 48k upgrade that isn't installed in a machine yet. IF you want to keep the machine as ATARI as possible you could always trade your mosaic for it. Just a suggestion. 

    I appreciate the offer, but I have installed the Mosaic and right now, it isn’t working right. I’ll be troubleshooting it tonight.

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