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  1. Replies
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    Not architecturally but from a product...

    Not architecturally but from a product standpoint. Was Wang first to put BASIC in ROM? That was a standard consumer microcomputer feature by 1979.

    Edit: Well not the first. HP 9830 in '72. Just...
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    Wang 2200 Influence

    The Wang 2200 was a popular minicomputer in the early 70s with built-in CRT, keyboard, cassette, and BASIC in ROM. Did its design have much influence on later microcomputers?
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    The Cromemco BASIC came from Shepardson...

    The Cromemco BASIC came from Shepardson Microsystems who soon after did Atari BASIC, Apple DOS, and Atari DOS. Atari was one brand who did just fine without Micros#!t.
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    Try this homebrew:...

    Try this homebrew:
    https://atariage.com/forums/topic/229152-new-pacman-for-atari-2600/
  5. My W10 laptop. I really want to like it, but...

    My W10 laptop. I really want to like it, but Micros#!t tries its best to make me hate it.
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    Congrats for getting it working. Nice video too....

    Congrats for getting it working. Nice video too. One correction: in the video you say twice that all the graphics characters are in ROM. That is false. Half ( 128 ) of the characters are in RAM, so...
  7. Thread: Overlooked?

    by ClausB
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    25
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    1,949

    Yes. I see those ads now in my old BYTEs and...

    Yes. I see those ads now in my old BYTEs and wonder why I didn't get one then.
  8. Thread: Overlooked?

    by ClausB
    Replies
    25
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    1,949

    What sort of terminal did you use for the S100...

    What sort of terminal did you use for the S100 machine?

    I was tempted in high school by a MITS 680 kit, but could not afford a terminal. Got a TI SR-56 instead.
  9. Thread: Overlooked?

    by ClausB
    Replies
    25
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    1,949

    The TI machines of the 70s had 4-bit serial or...

    The TI machines of the 70s had 4-bit serial or even single-bit serial CPUs but their working registers and memories were 64 bits wide. A single CPU instruction would operate on a whole register or...
  10. Thread: Overlooked?

    by ClausB
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    25
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    1,949

    Those Wangs and HP-9ks were pretty impressive,...

    Those Wangs and HP-9ks were pretty impressive, but at $5k+ in 1970, were they really "personal"?
  11. Thread: Overlooked?

    by ClausB
    Replies
    25
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    1,949

    Where do they hang out?

    Where do they hang out?
  12. Thread: Overlooked?

    by ClausB
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    1,949

    Here's a great site: http://www.rskey.org/CMS/

    Here's a great site:
    http://www.rskey.org/CMS/
  13. Thread: Overlooked?

    by ClausB
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    Yes, exactly right. So where are they now? The...

    Yes, exactly right. So where are they now? The machines are still pretty reliable, except for the NiCads and card drive rubbers, but those can be replaced. Why aren't there more retro enthusiasts...
  14. Thread: Overlooked?

    by ClausB
    Replies
    25
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    1,949

    I'm not writing this as an HP fanboy. I was in...

    I'm not writing this as an HP fanboy. I was in high school when I discovered computers in 1976 and could not afford an HP-65, nor an Altair system. Not even TI's SR-52 at $395. I settled for the TI...
  15. Thread: Overlooked?

    by ClausB
    Replies
    25
    Views
    1,949

    Overlooked?

    The question of the first commercially available personal computer has had several answers: Kenbak, Altair, Apple. One machine, offered in 1974 for $795, with 200 bytes of RAM, 4K bytes of ROM, a...
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    Programmable Calculator Emulators

    For the TI-57, TI-55, and TI-42 MBA:
    https://www.pcjs.org/blog/2017/11/05/
  17. Replies
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    No, I remembered wrong in that post. I think now...

    No, I remembered wrong in that post. I think now it came with 512K and I piggy-backed another 512K on that.
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    That will add 16K to a 32K Sorcerer I. I'll...

    That will add 16K to a 32K Sorcerer I. I'll recommend adding it to the underside of the main board. Cut a 28-pin socket into two rows of 14 contacts. Solder one to the underside of the socket at 13D,...
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    Connection diagram for a 32Kx8 SRAM (16K used)...

    Connection diagram for a 32Kx8 SRAM (16K used) wired into a Sorcerer I:

    +-----\/-----+
    13D-22 1 | A9 Vcc | 28 12C-16
    13D-23 2 | A8 Wr | 27 13B-3
    13D-1 3 | A7 3 ...
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    After the mod you still get the dark speckles...

    After the mod you still get the dark speckles during screen access, just not the horizontal jitter. But, point taken.
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    This is good advice. Also, if you want to fix...

    This is good advice.

    Also, if you want to fix the video tearing in your photo below, look here:
    http://www.vcfed.org/forum/showthread.php?49163-Exidy-Sorcerer-II-Questions&p=421500#post421500
    ...
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    I helped Tempest (who posted upthread) repair his...

    I helped Tempest (who posted upthread) repair his Sorcerer II with the same symptom, no DRAM. It was a bad cap on the 12V bus, as others have posted. After locating and replacing it his machine has...
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    Do you have a Sorcerer I with 32K? I'll work...

    Do you have a Sorcerer I with 32K?

    I'll work on that.
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    I still have the first 3 above but I did not keep...

    I still have the first 3 above but I did not keep the ST. I think it actually came with 512K and I modified it to 1MB.
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    1980: Atari 400, 8K, mod'd later to 48K 1982:...

    1980: Atari 400, 8K, mod'd later to 48K
    1982: Atari 800, mod'd later to 174K
    1984: Atari 800XL, mod'd to 256K
    1986: Atari ST, mod'd to 512K
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