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  • smp's Avatar
    July 18th, 2018, 01:41 PM
    Cool! I was worried that the code would be hard to nail down, but I guess if it can run almost anywhere in RAM, then one should be able to fix it in...
    52 replies | 897 view(s)
  • smp's Avatar
    July 18th, 2018, 07:01 AM
    I have this memory testing program for my Altair 680. I've been wondering when somebody might read the description: Yes, this program is...
    52 replies | 897 view(s)
  • smp's Avatar
    July 8th, 2018, 07:32 AM
    The mating connector would be a rectangular shell with a single row of flat blades to mate with the "sockets" on the PC board. I used these long ago...
    6 replies | 166 view(s)
  • smp's Avatar
    July 5th, 2018, 12:37 PM
    Well, there we go leaving out the venerable (IMO) Color Computer, which started out as a TRS-80, IIRC, but ended up as the Tandy Color Computer. The...
    28 replies | 1179 view(s)
  • smp's Avatar
    July 1st, 2018, 04:42 AM
    Great work! Thanks for the story. My Horizon was not that exciting, only a bunch of problems on the 64K memory board. The +5 regulator and its...
    13 replies | 376 view(s)
  • smp's Avatar
    June 29th, 2018, 01:00 PM
    I suppose that I'm not telling you anything new, but you should be able to get $1500 for that system on eBay, without breaking a sweat. It's...
    13 replies | 1168 view(s)
  • smp's Avatar
    June 27th, 2018, 07:15 AM
    smp replied to a thread Hello. SWTPC owner in Introductions
    FYI, I have been working with my Corsham Technologies 6800 system (a SWTPC replica system) and fig-FORTH. I just posted my fig-FORTH_6800 package...
    6 replies | 438 view(s)
  • smp's Avatar
    June 27th, 2018, 07:09 AM
    smp replied to a thread 6800 fig-FORTH? in Other
    Attached is a .ZIP file containing files for fig-FORTH_6800. Thanks very much to the excellent guidance and assistance from Dwight Elvey! The...
    31 replies | 902 view(s)
  • smp's Avatar
    June 26th, 2018, 11:55 AM
    smp replied to a thread 6800 fig-FORTH? in Other
    Thanks very much for the explanation, Dwight. Very much appreciated. smp
    31 replies | 902 view(s)
  • smp's Avatar
    June 26th, 2018, 07:56 AM
    smp replied to a thread 6800 fig-FORTH? in Other
    Thanks very much, Dwight! That did the trick. I commented out the original TYPE2, and I put in comments to indicate this new TYPE2 is to assure...
    31 replies | 902 view(s)
  • smp's Avatar
    June 25th, 2018, 02:36 PM
    smp replied to a thread 6800 fig-FORTH? in Other
    I believe I've answered my own question - probably yes, $7FFF is a bad limit because of signed integer arithmetic. I re-assembled with MEMTOP set to...
    31 replies | 902 view(s)
  • smp's Avatar
    June 25th, 2018, 02:21 PM
    smp replied to a thread 6800 fig-FORTH? in Other
    Here's another issue I have with the fig-FORTH: the VLIST command types out all the words in the FORTH dictionary. For me, this command does what...
    31 replies | 902 view(s)
  • smp's Avatar
    June 25th, 2018, 01:45 PM
    smp replied to a thread 6800 fig-FORTH? in Other
    As of 5:25 PM EDT today, here's where I am: fig-FORTH 6800 is running. I've determined that it wants to use RAM above the fig-FORTH MEMEND as a...
    31 replies | 902 view(s)
  • smp's Avatar
    June 25th, 2018, 10:19 AM
    smp replied to a thread 6800 fig-FORTH? in Other
    The original listing is correct with the BCS. The code I picked up from Source Forge had this changed to the BCC. As you had indicated, the...
    31 replies | 902 view(s)
  • smp's Avatar
    June 25th, 2018, 09:18 AM
    smp replied to a thread 6800 fig-FORTH? in Other
    Yup! :D I guess that someone had to get the listing all typed in so it could be stores there in the Source Forge, and that must have been where...
    31 replies | 902 view(s)
  • smp's Avatar
    June 25th, 2018, 07:36 AM
    smp replied to a thread 6800 fig-FORTH? in Other
    Yeah, you're right. For all those addresses, I could not actually verify my listing against the original. I only checked that there were no address...
    31 replies | 902 view(s)
  • smp's Avatar
    June 25th, 2018, 07:30 AM
    smp replied to a thread 6800 fig-FORTH? in Other
    Well Dwight, you were absolutely correct. Since I have some things to do today, but I had a brief moment just now, I loaded my fig-FORTH and made...
    31 replies | 902 view(s)
  • smp's Avatar
    June 24th, 2018, 04:38 PM
    smp replied to a thread 6800 fig-FORTH? in Other
    The byte-by-byte comparison is finished. No new findings. The only further differences found were the addresses for my ACIA control and data port...
    31 replies | 902 view(s)
  • smp's Avatar
    June 24th, 2018, 02:09 PM
    smp replied to a thread 6800 fig-FORTH? in Other
    I'm almost halfway through my byte-by-byte comparison. 21 of 44 pages have been checked so far. I found a changed instruction in the MINUS...
    31 replies | 902 view(s)
  • smp's Avatar
    June 24th, 2018, 09:56 AM
    smp replied to a thread 6800 fig-FORTH? in Other
    When I called out for help, I had changed the source code file so that it would assemble properly with the as02 assembler that I have. I also...
    31 replies | 902 view(s)
  • smp's Avatar
    June 24th, 2018, 05:05 AM
    smp replied to a thread 6800 fig-FORTH? in Other
    Thanks for the thought, Dave. I'm not sure what you mean by patching the JMP with BRA dynamically. When I run the assembler on my PC, it...
    31 replies | 902 view(s)
  • smp's Avatar
    June 23rd, 2018, 01:29 PM
    Yes, you're probably right. I got lucky one time and scored a relatively unknown (at least to me) game cart for $5 plus a few more $ for shipping. ...
    17 replies | 517 view(s)
  • smp's Avatar
    June 23rd, 2018, 11:13 AM
    Good, and good! Cloud-9 will sell you a programmed EPROM. Just send them and e-mail request for quote. smp
    17 replies | 517 view(s)
  • smp's Avatar
    June 23rd, 2018, 08:05 AM
    smp started a thread 6800 fig-FORTH? in Other
    Hi folks, I know there's not much 6800 activity here, but I figure this would be worth a try. Has anyone here ever seen or ever had fig-FORTH...
    31 replies | 902 view(s)
  • smp's Avatar
    June 23rd, 2018, 07:43 AM
    Really? Did you happen to notice the last post in this thread was back in March of 2011? Please folks, can we try to refrain from necro-posting!...
    12 replies | 5379 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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