RE: RP/M2 by Micro Methods Inc
>I found a copy of RP/M2 for the IBM PC by Micro >Methods Inc. with manual >and >some floppies, 8" and 5.25". According to the >manual, this was a >CP/M >compatible operating system. David,Did you see the article on page >94:http://www.bitsavers.org/magazines/Micro_Cornucopia/Micro_Cornucopia_%2329_Apr86.pdf-Ali >
RP/M2 by Micro Methods Inc
I found a copy of RP/M2 for the IBM PC by Micro Methods Inc. with manual and some floppies, 8" and 5.25". According to the manual, this was a CP/M compatible operating system. Doing a web search doesn't tell me anything more than a couple offhand comments. Does anyone here know anything interesting about this? -- David Griffith d...@661.org A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?
Re: HP 2100A Restoration
On Sat, Jul 17, 2021 at 2:28 PM johnr@grebnesor via cctalk wrote: > > Hello, > > I came across a web article in which you discussed restoring an HP2100A. I > spent many years working on this computer and have the front panel. I am > doing some work on it to produce a display for fun. I am replacing the > incandescent globes with LEDs and using a Raspberry Pi to control them. > > The question I have is, do you know an easy way to remove and insert globes > in the front panel switches please? The HP 2100A front panel uses T-1.75 Bi-Pin base miniature lamps. The last time I replaced some, if I remember correctly, I used Chicago Miniature CM7361 lamps for replacement. I forget if I was able to get a grip on them at all with needle-nose pliers to pull them out, or if I used something else. If you look for purpose built tools it appears that there are a couple of common styles. One style uses some sort of flexible plastic or rubber tube that is just the right diameter and wall thickness that it can be pushed on to the lamp, and then maintain enough friction on the lamp to pull it out when the tube is pulled out. Another style uses a metal tube that is split along its length that can be pushed on to the lamp when the halves of the tube are separated, then the halves of the tube can be pressed together to grip the lamp so it can be pulled out when the tube is pulled out. An example of the second style that shows up in a lot of lamp extractor searches is the Jonard S-339: https://jonard.com/s-339-lamp-extractor At somewhere around $30 for those tools I haven't been curious enough about buying one to see if it is suitable for removing and inserting HP 2100A front panel lamps.
VaxBrick (vax 4000-50, KA600 ) Owners manual/technical manual
Doe anyone have an "owners manual" or technical manual for the KA600 aka VaxBrick aka Vax 4000-50? I have most of a Vaxbrick, but I'd sooner run Unix on it that VMS. But I know of no open-source OS which supports the KA600. I'd guess most of the internal devices are similar to SCSI or DSSI on high-end Microvaxes/vaxstations; but that's a guess. There's a listing on eBay for a lot which includes vaxbricks. I've made an offer on it, but let the offer expire after finding no open-source drivers. I'm willing to front purchase of the lot, if others are interested in buying a VaxBrick in a BA213 or BA 215. -Jonathan Stone
Re: HP 2100A Restoration
Hello, I came across a web article in which you discussed restoring an HP2100A. I spent many years working on this computer and have the front panel. I am doing some work on it to produce a display for fun. I am replacing the incandescent globes with LEDs and using a Raspberry Pi to control them. The question I have is, do you know an easy way to remove and insert globes in the front panel switches please? I am based in Melbourne, Australia. Many thanks John _ Professor John Rosenberg E: jo...@grebnesor.com M: +61 418 253001
