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  • Mike_Z's Avatar
    Today, 10:10 AM
    Mike_Z started a thread CIT-101 terminal in DEC
    A while ago, Jack Rubin gave me a CIT-101 video monitor, with out a keyboard. I have not had any luck finding a keyboard for this monitor. In fact...
    1 replies | 40 view(s)
  • Mike_Z's Avatar
    February 4th, 2019, 07:11 AM
    Mike_Z replied to a thread Digital 32KW RAM pcb in DEC
    Vince, I would like a memory board when you have them. I still owe Jack his board back. Mike
    14 replies | 586 view(s)
  • Mike_Z's Avatar
    February 2nd, 2019, 11:31 AM
    Mike_Z started a thread OS/8 DATE command in DEC
    I've horsing around with the DATE command. The OS/8 handbook 1974 and System Reference manual 1973 say that the DATA command format is DAte...
    0 replies | 89 view(s)
  • Mike_Z's Avatar
    January 31st, 2019, 08:27 AM
    Mike_Z replied to a thread OS/8 boot screen in DEC
    Thanks, Bill. Are you talking about the OS/8 Handbook? I have the April 1974 issue. I also have the Field Service Software Assistance Brochure. Do...
    5 replies | 260 view(s)
  • Mike_Z's Avatar
    January 31st, 2019, 06:58 AM
    Mike_Z replied to a thread OS/8 boot screen in DEC
    Bill, thanks for the screen shot. On my machine, INIT.CM is used for the text of the boot screen. I can also include some 'real' stuff, like VERsion,...
    5 replies | 260 view(s)
  • Mike_Z's Avatar
    January 30th, 2019, 03:57 PM
    Mike_Z started a thread OS/8 boot screen in DEC
    Over the past few days I have installed Roland's boot loader circuit board in my PDP8E. I watched his you tube films a bunch of times and noticed...
    5 replies | 260 view(s)
  • Mike_Z's Avatar
    January 29th, 2019, 02:58 PM
    Well..... another boot loader is in service on a PDP8E. I had followed this thread since the beginning, but was unsure of how to exactly have a board...
    56 replies | 7664 view(s)
  • Mike_Z's Avatar
    January 26th, 2019, 09:05 AM
    Mike_Z replied to a thread PAL8 assembly language question in DEC
    Thanks, right now just standing up and sitting down is a delicate operation, much less than tackling the stairs. Then to top it off, the outside...
    18 replies | 718 view(s)
  • Mike_Z's Avatar
    January 26th, 2019, 08:36 AM
    Mike_Z replied to a thread PAL8 assembly language question in DEC
    Just got back from hernia surgery, not feeling very well. Yes I did ask about the OR, had used it and it works well. I was reading the PAL8 section...
    18 replies | 718 view(s)
  • Mike_Z's Avatar
    January 24th, 2019, 04:38 PM
    Mike_Z replied to a thread PAL8 assembly language question in DEC
    I thought that this may at least get the result into the AC FIRST, 0076 SECOND, 1200 TAD FIRST!SECOND But the result is still the...
    18 replies | 718 view(s)
  • Mike_Z's Avatar
    January 24th, 2019, 04:18 PM
    Mike_Z replied to a thread PAL8 assembly language question in DEC
    Moving on to the next question, How do you use the operator !. I want to OR two values. FIRST, 0076 SECOND, 1200 THIRD=FIRST!SECOND ...
    18 replies | 718 view(s)
  • Mike_Z's Avatar
    January 24th, 2019, 09:20 AM
    Mike_Z replied to a thread PAL8 assembly language question in DEC
    My INI file looks like this set cpu 32K set cpu idle attach rk0 advent.rk05 boot rk0 exit After removing the exit, the SimH windows doesn't...
    18 replies | 718 view(s)
  • Mike_Z's Avatar
    January 24th, 2019, 08:12 AM
    Mike_Z replied to a thread PAL8 assembly language question in DEC
    Since, the basement is rather cold, I have been using SimH PDP8, upstairs. One problem that I have with SimH and I do not know how to get around it....
    18 replies | 718 view(s)
  • Mike_Z's Avatar
    January 24th, 2019, 07:52 AM
    Mike_Z replied to a thread PAL8 assembly language question in DEC
    Say, that worked like a charm. Here is what I tried. I'll have to look into the auto indexing stuff. I seem to remember something about it, but... ...
    18 replies | 718 view(s)
  • Mike_Z's Avatar
    January 23rd, 2019, 03:19 PM
    I'm working on a program, using PAL8 and have come across a problem. The program is doing a calculation that results in an ASCII number being held in...
    18 replies | 718 view(s)
  • Mike_Z's Avatar
    January 22nd, 2019, 09:51 AM
    Well..... since the 7 bit CRLF and EOF seemed to work, I thought I change the packed 6 bit ASCII to individual 7 bit and it works. So I was wrong...
    27 replies | 1374 view(s)
  • Mike_Z's Avatar
    January 22nd, 2019, 08:58 AM
    I added a CRLF EOF to the code and the behavior did change. The change is that now, there is a CRLF at the end of the printing before the program...
    27 replies | 1374 view(s)
  • Mike_Z's Avatar
    January 21st, 2019, 04:56 PM
    Mike, the typing machine/keyboard and the reader/punch are in parallel. So when one works they both can. There is a power switch to stop the punch...
    27 replies | 1374 view(s)
  • Mike_Z's Avatar
    January 21st, 2019, 11:55 AM
    I didn't have an opportunity to look at this over the weekend. Saturday it snowed, spent time shoveling, warning up and shoveling more. Sunday we...
    27 replies | 1374 view(s)
  • Mike_Z's Avatar
    January 18th, 2019, 04:45 PM
    Here is the header block of the ASR33.BN file I found on my disks. *0 -1 DEVICE AS33; DEVICE TTY;0;1; ZBLOCK 2 TTYVERSION="A&77
    27 replies | 1374 view(s)
  • Mike_Z's Avatar
    January 18th, 2019, 04:28 PM
    Nothing was printed. In fact looking at what entry point address was loaded from the fetch, I see that the ASR33 device handler code has a return...
    27 replies | 1374 view(s)
  • Mike_Z's Avatar
    January 18th, 2019, 11:10 AM
    Made some progress today. Wrote a device handler call and the first attempt of using it failed. Found a few code mistakes and after the changes the...
    27 replies | 1374 view(s)
  • Mike_Z's Avatar
    January 17th, 2019, 07:27 AM
    Well..... after some horsing around I think the TTY device handler loaded. Thinking about it, I wanted to be sure that I had the correct device...
    27 replies | 1374 view(s)
  • Mike_Z's Avatar
    January 16th, 2019, 12:34 PM
    Well..... this is what I tried (and it didn't work, at least in my estimation). 0200 7200 CLA 0201 6201 CDF 0 0202 6212 CIF 10 0203 ...
    27 replies | 1374 view(s)
  • Mike_Z's Avatar
    January 16th, 2019, 12:08 PM
    I found information regarding the address of (USR, but I'm confused. Page 2-1 states the USR is either 7700 or 0200. Then on page 2-2 states, the USR...
    27 replies | 1374 view(s)
  • Mike_Z's Avatar
    January 16th, 2019, 10:39 AM
    Am I correct in thinking that OS/8 loads the device handlers into memory field zero. Then the Fetch call for the TTY device handler loads the handler...
    27 replies | 1374 view(s)
  • Mike_Z's Avatar
    January 16th, 2019, 10:08 AM
    I've been studying the I/O routines listed in appendix F of the OS/8 Software Support Manual. There is ICHAR, OCHAR, IOPEN, OOPEN, and OCLOSE. Am I...
    27 replies | 1374 view(s)
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About Mike_Z

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About Mike_Z
Biography:
Retired Old Steam Power Plant Engineer
Location:
Near Milwaukee Wisconsin
Interests:
Old stuff, computers, cars, furniture, houses
Occupation:
Retired

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