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  1. Luckily the offer is free. :p Yep, that's...

    Luckily the offer is free. :p



    Yep, that's the issue. The TVGA8900CL nor the MFM controller have no way of changing the address, unfortunately.
  2. Thank you :) My biggest concern is hardware and...

    Thank you :) My biggest concern is hardware and software compatibility, after a bad experience with another VGA card that conflicted with the hard drive controller, which took me years to diagnose.
  3. Need help choosing a VGA card for turbo XT system

    Hi - I have the opportunity to choose one of three different XT-compatible 16-bit ISA VGA cards, to put in my Epson Apex Plus turbo XT system. All three cards have been tested to work fine in an IBM...
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    Thanks everyone for the responses. I didn't even...

    Thanks everyone for the responses. I didn't even think you could install both NU and PCT on the same machine, let alone that people actually do it! I thought I tried that on a machine a few years...
  5. That's pretty much a given on almost any computer...

    That's pretty much a given on almost any computer from 1985, let alone one as tiny as the PC-7000.
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    Norton Utilities vs PC Tools?

    Just wondering if anyone has any opinions regarding which suite you prefer, and why. I've always used NU on my DOS machines (8.0 on the 486 and 6.0 on the XT), but I would like to try PC Tools...
  7. Nice find! I have a PC-7000, perfect working...

    Nice find! I have a PC-7000, perfect working except the B: drive suddenly stopped working correctly one day - it will only read and format one side of a disk. I've tried everything short of...
  8. I posted about this issue on...

    I posted about this issue on Reddit/r/vintagecomputing, and got a very surprising response - someone else on there has a 5155 with a SixPackPlus, and theirs is having the exact same issue! They can...
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    Wanted: ATI EGA Wonder

    Specifically one of the ones with the IBM 5155 monitor header on the card. If you're not sure, just send me a pic. :)

    Located in NB, Canada. Thanks!
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    I would guess MS-DOS 5. I don't know if FreeDOS...

    I would guess MS-DOS 5. I don't know if FreeDOS is any better for RAM usage or not.
  11. Darn, it really looks like my card isn't working...

    Darn, it really looks like my card isn't working correctly, doesn't it.

    Well, 576 KB is almost 640 KB... :rolleyes:
  12. So CheckIt and DEBUG can be used to test memory...

    So CheckIt and DEBUG can be used to test memory that the computer itself doesn't acknowledge? Would it be any use to use one of these tools somehow to test the final bank?
  13. What the heck. I just replicated what you did,...

    What the heck. I just replicated what you did, and also got a count to 448 KB. Yet I performed the same test earlier, albeit having removed a different chip, and it stopped at 256 KB.

    I am unsure...
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    I'll add that the larger the drive, the longer it...

    I'll add that the larger the drive, the longer it takes DOS to calculate the free space when you do a DIR (which it has to whenever the amount of used space has changed). I have a 120 MB mechanical...
  15. Done; no dice. I had hope for that one though -...

    Done; no dice. I had hope for that one though - the contacts were rather dirty. I just never thought to clean them since the card otherwise works perfectly.
  16. Okay, I pulled the computer out again: It...

    Okay, I pulled the computer out again:



    It counts to 256 KB and boots with no error.



    Done; no dice.
  17. It actually does the same if there is simply a...

    It actually does the same if there is simply a poor connection to a chip. When I first tested the new chips in banks 3-4, it behaved the same, only counting up to 256 KB and not issuing an error....
  18. No luck getting third RAM bank working in AST Six Pack Plus

    (EDIT: The title should say *sixth* RAM bank, not third.)

    My IBM 5155 has 256 KB of memory on the motherboard, and 256 KB on an AST Six Pack Plus card. I recently bought 18 DRAM chips to fill the...
  19. Perfect, just making sure. Thanks!!

    Perfect, just making sure. Thanks!!
  20. Hmm, timings... AST's manual states to use 200 nS...

    Hmm, timings... AST's manual states to use 200 nS RAM. The RAM already in mine is 150 nS, and the RAM I might buy is 200 nS. Do you think it's safe to assume that the card always runs at 200 nS...
  21. Mixing RAM types in an AST Six Pack Plus?

    The AST Six Pack Plus (long version) in my IBM XT has four of the six banks populated with 4264 chips. I would like to populate the remaining two banks, and have the opportunity to purchase some...
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    Look at the seller's feedback - 96.7% is...

    Look at the seller's feedback - 96.7% is horrendous.

    There are times something I bought on eBay was advertised as "good working", and was anything but when I got it. In every instance, I've never...
  23. Doh, I didn't even think of the motherboard...

    Doh, I didn't even think of the motherboard switches! And that didn't come up when I was googling the issue either. That did the trick - thanks!
  24. Configure IBM 5155/5160 for one floppy drive

    My IBM 5155 originally had two floppy drives in it, but I disconnected one of them when it failed. It works just fine with the one drive, except it seems to think it still has two physical drives. If...
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    Ah, good point - I didn't think of that.

    Ah, good point - I didn't think of that.
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