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  1. Replies
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    Try this homebrew:...

    Try this homebrew:
    https://atariage.com/forums/topic/229152-new-pacman-for-atari-2600/
  2. 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...
  4. Thread: Overlooked?

    by ClausB
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    1,787

    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.
  5. Thread: Overlooked?

    by ClausB
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    1,787

    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.
  6. Thread: Overlooked?

    by ClausB
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    1,787

    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...
  7. Thread: Overlooked?

    by ClausB
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    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"?
  8. Thread: Overlooked?

    by ClausB
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    25
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    Where do they hang out?

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

    by ClausB
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    25
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    1,787

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

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

    by ClausB
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    1,787

    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...
  11. Thread: Overlooked?

    by ClausB
    Replies
    25
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    1,787

    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...
  12. Thread: Overlooked?

    by ClausB
    Replies
    25
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    1,787

    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/
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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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    That's right. Look up Jay Miner.

    That's right. Look up Jay Miner.
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    Sorry for the late reply. I expanded mine back...

    Sorry for the late reply.

    I expanded mine back in the day to 56K using 64K DRAMs.

    http://www.vcfed.org/forum/showthread.php?49163-Exidy-Sorcerer-II-Questions&p=421499#post421499

    If you're...
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    A Teensy 3 might be fast enough and still provide...

    A Teensy 3 might be fast enough and still provide the ease of the Arduino IDE.

    https://www.pjrc.com/teensy/techspecs.html
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