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  • smp's Avatar
    February 17th, 2018, 09:59 AM
    smp replied to a thread 8080 TTL Project in Other
    Hi Marty, and welcome back! Your project sounds like it is appropriate for VHDL or FPGA design. I thought someone else here was helping you learn...
    10 replies | 176 view(s)
  • smp's Avatar
    February 13th, 2018, 05:33 AM
    The stock Altair CPU board had a marginal clock circuit. I suggest that you take a close look at the 2-phase clock signals. Remember they must be...
    16 replies | 574 view(s)
  • smp's Avatar
    February 11th, 2018, 05:36 AM
    smp replied to a thread HP 110 Portable in Handhelds/Portables
    Save yourself a bit of trouble and purchase this: ...
    13 replies | 350 view(s)
  • smp's Avatar
    February 10th, 2018, 11:05 AM
    I have the Statistics and the Finance modules, but no documentation to go along with them. The Finance module has a keyboard overlay - I do have...
    1 replies | 140 view(s)
  • smp's Avatar
    February 6th, 2018, 04:59 PM
    You made me doubt myself (see my earlier post) so I got out my 74 and tried them. Nope, not available. Just to be certain, I scoured the...
    13 replies | 406 view(s)
  • smp's Avatar
    February 4th, 2018, 12:26 PM
    smp replied to a thread Another PDP-8L on eBay in DEC
    It must have been taken down - I don't get the auction when I click the link. I did find this one, in rough shape, but offered for nearly $10K: ...
    9 replies | 226 view(s)
  • smp's Avatar
    February 2nd, 2018, 09:47 AM
    There is an article out there that compares the TI-74 to the previous TI CC-40: http://www.99er.net/ti74art.html In that article, the author...
    13 replies | 406 view(s)
  • smp's Avatar
    January 30th, 2018, 02:56 PM
    Wow. If you asked, I would gladly have taken $100 and saved you $75. Too bad. smp
    8 replies | 262 view(s)
  • smp's Avatar
    January 30th, 2018, 05:38 AM
    What Glitch said, BUT it looks exactly like the one I have (except I don't have it framed). 8-) I posted a pic of mine long ago in the Other...
    8 replies | 262 view(s)
  • smp's Avatar
    January 27th, 2018, 05:48 AM
    Just a brief tip: Google is your friend when trying to identify DEC circuit boards. This guide is also very handy: ...
    21 replies | 930 view(s)
  • smp's Avatar
    January 23rd, 2018, 05:37 AM
    smp replied to a thread DEC PDP-8/F available on eBay in DEC
    I use eBay a lot, mostly as a Buyer, sometimes as a Seller. I get those messages from eBay in the internal-to-eBay message system. I have to go...
    20 replies | 970 view(s)
  • smp's Avatar
    January 20th, 2018, 01:31 PM
    smp started a thread DEC PDP-8/F available on eBay in DEC
    This is not mine. ...
    20 replies | 970 view(s)
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About smp

Basic Information

Date of Birth
June 16
About smp
Biography:
Graduated college with my BSEE in 1975. MSCS in 2002.

Retired in October 2016, and I'm loving every moment of it.

A note from my past history:
In November 1976, I opened the first computer store in NH: Microcomputers, Inc. We sold IMSAI, Polymorphic, and Northstar kits, and assembled cards and computers. We attempted to sell complete systems into local small businesses. My partner and I operated until the fall of 1978, when we went broke.

I have (currently working):
Altair 680, IMSAI 8080 with JAIR-8080 CPU replacement running CP/M v2.2, HP-86B with HP-82900A Auxiliary Processor (A.K.A. CP/M System) and HP-9121D floppy disk drive, HP-110+ with HP-9114 floppy disk drive, HP-200LX, HP-41CL, HP Jornada 820, Apple IIC+, Apple IIGS (ROM 3), Tandy 2800HD, CoCo 3 with SDC, CoCo3FPGA, Heathkit H8, Osborne 1, Osborne Executive, Kaypro 2, Macintosh 512KE, Macintosh PowerBook 170, Macintosh Graphite iBook 466MHz (M6411), DEC PDP-11/23;

and (currently non-working):
(another) Kaypro 2, Heath/Zenith Z-110, SPARCclassic, a small variety of Macintosh desktop units.
Location:
Bedford, NH, USA
Interests:
Space Exploration, Astronomy, Vintage Computing, RV Camping
Occupation:
Retired, and loving it!

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