Search results

Hi Retrolab, I no longer have any model 150 manuals, but found the problem analysis and repair manual for the models 170 and 250. It may (or may not!) be of help. http://www.ibmfiles.com/ibmfiles/as400/170_250_Problem_Analysis_Repair_Parts.pdf Chapter 2 covers 0000 control panel reference...

Hi PaulC, Welcome to the forum :) I don't suppose your dad has any information, technical, advertising, or otherwise for the M3, M4 or Octopus does he? Or even just memories of how these systems developed from ideas through to production? As well as restoring a M3 and owning an Octopus, that...

I'm afraid I can't help with the PAL, and unfortunately the M4 schematics that I used to have are long gone. About 7 years ago, when I was restoring my M3, I contacted the engineer who I'd given all my LSI documentation to, but it turned out he had had a big sort out several years prior and had...

Hi Broosky4, It turns out that I do have an M4 disk image that is bootable (see attached) - it contains the Prolog Language, WordStar, some standard M4 utilities (including DISCOPY and FORMAT) and the CP/M-86/80 system file. It is in LSI-M4 5.25" DSDD 400K format and can be written to a...

Hi Broosky4, You’ve probably already found that LSI Computers Ltd were based in Copse Road, St. Johns, Woking, Surrey. Their manufacturing arm, CPU Computers, produced their machines – the LSI M1, M2, M3, M4 and then Octopus (code name M5). The M4 is a dual CPU machine. The 16 bit 8088 being...

Would your MCLZ8, less any TRS-80 specifics, work on other Z80 based systems?

Once I’ve posted to a thread, I no longer see that thread under New Posts, even if someone else posts to it after me. I can see it in the Activity Stream and under the area of the Forum the thread is posted in. Is this just me? Is there a setting I can flip to change this behaviour? Am I...

You can boot into the card's monitor prom. The attached zip file contains an MS-DOS console program I wrote to attach to the DMS PC card. I even got as far as attaching one of JonB's uIDE hard drive cards to one of these. Next step was to modify the prom to allow booting from the uIDE and...

Planned house move (downsizing) means I’ve got to let go of my AS/400, model 9401-150. It’s a UK collection only and I’m offering it here, just for the price of a beer or two, rather than on fleaBay. This machine was released around 1996/7, it came my way around 2004 and is still fully...

I've got some of these from some no-longer-used baby monitors. Would they work in place of 3.6v barrel batteries?

So I opened up the monitor, took some pics and did a little research. Here are the pics - they may be of use to others in the future, as I was unable to find this monitor on the web. Rear of case showing adjustment holes: Opened case showing tube, model Matsushita 310 JY B31 (N), power/audio...

I've got a Panasonic monitor that doesn't always sync correctly after hitting CTRL-ALT-DEL. I sometimes need to switch the monitor off and on several times before it displays the image correctly. Here's what it looks like before CTRL-ALT-DEL: And here's after: It's a 1980s Panasonic...

So, I’m looking at filling the empty 8087 socket in my LSI Octopus and as its 8088 runs at 8MHz, I assume it would require (at least) an 8MHz 8087-2. My question is, would I be able to fit the faster (and slightly cheaper) 10MHz 8087-1 coprocessor? I only ask because the Wikipedia details for...

Would anyone have the technical specs and/or maintenance info for an Epson SD-540 5.25" DS QD floppy disk drive? I can find very little info on Google for this drive. I'm assuming it's a DS QD 96tpi drive as I removed it from an LSI Octopus computer that had it configured as such. This is one...

Can anyone make use an IBM ThinkPad 1.44 MB 3.5" external floppy drive + case. Free to a good home, just pay the shipping (from West Midlands, UK). I've no idea if it works or not - the IT department were having a clear out and dropped it on my desk :). Case references FRU P/N 05k6187, ASM...

Oh boy, this is going to be fun, NOT. I've acquired an LSI Octopus, Concurrent CP/M-80/86 based, computer and the keyboard (manufactured by Cherry) employs foam and foil capacitive keys. As is usually the case with these 30+ year old keyboards, the foam pads have deteriorated. However...

Just spotted the following TRS-80 Model II Desk on eBay UK. It's still at £50 with no bids yet and just over 4 days left. http://www.ebay.co.uk/itm/Tandy-Radio-Shack-Model-2-computer-TRS80-desk-workstation-system-desk-70s/401391691750 Or for those who don't like following links, it's eBay...

Thanks. Since this was first posted, I've written a CP/M 2.2 CBIOS for it that makes use of the 36 programmable function keys, patched CP/M to use the ZCPR CCP replacement and have it running with a HxC floppy emulator (which is much quieter than the two Shugart 8" drives). Next steps are to...

Fair enough. I can wait until it's proven working, or maybe assist where possible. Yep, it was on eBay. It needed a thorough clean inside and out, plus reparing the screen cataracts and re-capping the power supply. And as it didn't come with any software I disassembled and documented the...

Hi All, I’m looking for some advice or best practice on how to handle double sided disks within a CP/M 2.2 CBIOS. My CBIOS deblocking routines are currently working on just side 0. I’m using 8” DD disks formatted as 77 tracks, 8 x 1024 byte sectors per track and 2 sides – well, to be honest...