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  • daver2's Avatar
    Today, 08:05 AM
    >>> It is a little confusing at first but one gets used to it. Mode FORTH Engage. Your partial disassembly would help to kick-start me off. ...
    13 replies | 671 view(s)
  • daver2's Avatar
    Yesterday, 11:04 PM
    Sorry Dwight, I wasn’t clear enough. I am not interested in the data as stored within the 1702 EPROM but as the 4004 CPU will process the data. ...
    13 replies | 671 view(s)
  • daver2's Avatar
    Yesterday, 10:14 AM
    I think that is a good idea also. +1 to the count - although the post is a bit late to the party :-)... Dave
    14 replies | 2374 view(s)
  • daver2's Avatar
    Yesterday, 08:29 AM
    There doesn't look to be anything wrong with the "SCREEN 1,0" statement - it should select a medium resolution graphics screen with the colour burst...
    8 replies | 171 view(s)
  • daver2's Avatar
    Yesterday, 08:13 AM
    Four (4) separate binary files (labelled something obvious like A0740, A0741, A0742 and A0743) in a single ZIP would be my choice. Something that...
    13 replies | 671 view(s)
  • daver2's Avatar
    Yesterday, 03:34 AM
    And please provide the SCREEN statement as it is specified within the BASIC source code that is creating the error. There should be some...
    8 replies | 171 view(s)
  • daver2's Avatar
    Yesterday, 01:50 AM
    Did you ever send me the images? I don't recollect seeing them anywhere. Dave
    13 replies | 671 view(s)
  • daver2's Avatar
    Yesterday, 01:46 AM
    Only use a PET with the safety earth connected. You get to live then if a live to case short circuit occurs within the PET! Can you check the...
    127 replies | 7909 view(s)
  • daver2's Avatar
    Yesterday, 01:41 AM
    The (other) Dave here... Good detective work so far. Yes, a socketed UC2 probably indicates that someone has been working on it as you have...
    2 replies | 59 view(s)
  • daver2's Avatar
    September 20th, 2020, 03:53 AM
    C715 becomes C28 then... Note that this is a non polarised (NP) capacitor. Also, your video board doesn't appear to have a LIN inductor in the...
    13 replies | 224 view(s)
  • daver2's Avatar
    September 20th, 2020, 01:20 AM
    Assuming dave_m has identified the correct monitor schematic back in post #2, checkout the following components: C716 - power supply. I would also...
    13 replies | 224 view(s)
  • daver2's Avatar
    September 19th, 2020, 10:03 AM
    Andy, It should do. I designed it to run on all PETs with all versions of BASIC. It replaces the EDIT ROM (which would normally be in an IC...
    5 replies | 86 view(s)
  • daver2's Avatar
    September 19th, 2020, 08:12 AM
    My PETTESTER code uses the MARCH-C memory test for that very reason. The only problem I ran into (and plan to fix sometime) is that to access...
    5 replies | 86 view(s)
  • daver2's Avatar
    September 17th, 2020, 09:55 AM
    daver2 replied to a thread DEC equipment - UK only. in DEC
    All the storage boxes had tape drives in them. But, I suspect, I will have a few SCSI disks spare when I have finished I dare say. Dave
    27 replies | 1083 view(s)
  • daver2's Avatar
    September 17th, 2020, 09:30 AM
    daver2 replied to a thread DEC equipment - UK only. in DEC
    The pile of VAX bits seem to diminish to zero this afternoon! Thank you to everyone who has played their part in saving equipment from the...
    27 replies | 1083 view(s)
  • daver2's Avatar
    September 17th, 2020, 01:25 AM
    daver2 replied to a thread DEC equipment - UK only. in DEC
    A bit of a delay getting equipment offsite today. Enjoy the sights of Morecambe and pop back after 12:30. Hopefully the equipment should be there...
    27 replies | 1083 view(s)
  • daver2's Avatar
    September 16th, 2020, 04:36 AM
    daver2 replied to a thread DEC equipment - UK only. in DEC
    I have removed the hard disks from the equipment and labelled everything up ready for the 'shifters' tomorrow. I will take them back with me and...
    27 replies | 1083 view(s)
  • daver2's Avatar
    September 15th, 2020, 06:07 AM
    daver2 replied to a thread DEC equipment - UK only. in DEC
    I can't take photographs (there is a reason) - but I am sure that some will appear from the recipients in due course :-). Incidentally, the road...
    27 replies | 1083 view(s)
  • daver2's Avatar
    September 14th, 2020, 01:06 AM
    daver2 replied to a thread DEC equipment - UK only. in DEC
    Just a "heads up". The approach road to the power stations is closed and a diversion is in place. The diversion still takes you past goods...
    27 replies | 1083 view(s)
  • daver2's Avatar
    September 13th, 2020, 06:43 AM
    My post #46 probably holds the secret? MCTERM ROM and disk plus an interface cable between the USER port ‘bit banging’ the serial lines to the...
    58 replies | 5696 view(s)
  • daver2's Avatar
    September 12th, 2020, 12:10 PM
    But is that schematic valid for your machine though? OK, the schematics look similar, but... So, what you are proposing to do is to parallel up...
    18 replies | 229 view(s)
  • daver2's Avatar
    September 12th, 2020, 11:32 AM
    UE2? Have I got the right schematics and board layout I wonder? Dave
    18 replies | 229 view(s)
  • daver2's Avatar
    September 12th, 2020, 09:37 AM
    daver2 replied to a thread DEC equipment - UK only. in DEC
    Gary, Sorry about the confusion. I sent one to your private email account. dave
    27 replies | 1083 view(s)
  • daver2's Avatar
    September 12th, 2020, 08:00 AM
    Here is mine https://drive.google.com/drive/folders/1fyLbr1kcG98a2FDOMo1H5pj9lIdJpHcx?usp=sharing This fits in the EDIT ROM socket (not in place...
    18 replies | 229 view(s)
  • daver2's Avatar
    September 12th, 2020, 06:00 AM
    daver2 replied to a thread DEC equipment - UK only. in DEC
    PMs sent to everyone who requested equipment. Dave, I will put yours in the post - once I find out what it is... Dave
    27 replies | 1083 view(s)
  • daver2's Avatar
    September 11th, 2020, 11:18 PM
    How are you testing your PET? Are you using a PETTESTER ROM of some description or what? the /CAS line going low ‘once a blue moon’ is not...
    18 replies | 229 view(s)
  • daver2's Avatar
    September 11th, 2020, 04:15 AM
    daver2 replied to a thread DEC equipment - UK only. in DEC
    Gary, I thought you would... The equipment is being moved to offsite deliveries first thing Thursday morning. Equipment can be picked up from...
    27 replies | 1083 view(s)
  • daver2's Avatar
    September 11th, 2020, 03:18 AM
    daver2 replied to a thread DEC equipment - UK only. in DEC
    A bit later than anticipated - but I have just heard myself about the collection arrangements. Whatever people have asked for is generally...
    27 replies | 1083 view(s)
  • daver2's Avatar
    September 6th, 2020, 11:47 AM
    daver2 replied to a thread CBM 3032 Board Issues in Commodore
    Yes, does your post #14 imply you have some (or all) of it working now? There is a whole load of switch settings on the Tynemouth ROM/RAM card; so...
    22 replies | 647 view(s)
  • daver2's Avatar
    September 6th, 2020, 11:45 AM
    daver2 replied to a thread DEC equipment - UK only. in DEC
    So, I shall tell the customer that we want the lot and how long can he hold on to it before it has to be collected. That should save it all from the...
    27 replies | 1083 view(s)
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About daver2

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SW/HW design engineer

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