test-drb August 2012

test-drb@ccmp.vtda.org

215 participants
247 discussions

by jce＠seasip.demon.co.uk

> Any more CP/M-compatible Z80 OSs? ZCN on the Amstrad NC100 portable. Notable because the NC100 used the Z80 NMI, which you can't normally use on a CP/M system what with it being in the middle of the default File Control Block at 5Ch. So ZCN has to go through some elaborate gymnastics involving saving that byte of the FCB and sticking a RST instruction there instead. -- John Elliott

12 years, 3 months

Ideal storage conditions

by tshoppa＠wmata.com

> So I finally have one of them fancy dehumidifiers that has a finely > adjustable humidi-stat in the basement to keep the collection dry. Required listening, the Traveling Wilburys "Cool Dry Place". > What's the ideal setting? I know too dry isn't a good thing, for neither > the collection nor my house. Right now I've got it set to 40% and it's > running pretty aggressively. My basement hovers between 55 and 60 degrees > Fahrenheit throughout the year, and the dehumidifier figures out relative > humidity for you. I think 40% is a little too aggressively low and my dehumidifier would run pretty much continuously May-September if I had it set that low. 60% is a better ballpark and only during the most humid parts of summer does my basement dehumidifier run more than a few hours a day. I will sometimes go as low as 30% setting during the summer but only when I want to demonstrate my Wimshurst machine :-) Tim.

12 years, 3 months

Microkit 8/16 info?

by derschjo＠gmail.com

Anyone know anything about the Microkit 8/16 computer? I just snagged one off eBay (item 390461957738) -- it looked too cool to resist. Looks to be from the mid-70s, 8080-based, and all I can find on the 'net is very basic information. Anyone have manuals or software? There were two others on eBay, but they appear to have been snatched up in the three minutes I spent composing this mail... - Josh

12 years, 3 months

Wanted: DEC PDP-8/A power transformer and backplane

by john.ralb＠gmail.com

Recently I found an incomplete PDP-8/a and need the transformer and backplane to start working on it. If anyone has one or both then please let me know.

12 years, 3 months

ISO Viewlogic Workview

by aek＠bitsavers.org

Someone is trying to look at some old schematics from around 1992 and asked me if I had a copy.

12 years, 3 months

Panasonic HHC technical information

by rrr_lopes＠yahoo.com.br

Hello, I'm trying to understand the intriguing Panasonic HHC. Does somebody have additional technical information beside the contents of the User's Manual? I'm particularlly searching for the SnapFORTH ROM image and manual, any hardware schematics, and the expansion connector pinout. I'm also trying to understand the Cassette Tape audio file format. Any information on that will be nice too. Ricardo P.S. Sorry about my limited English vocabulary and eventual (unnoticed) lack of politeness. I'm from Brazil and not English native.

12 years, 3 months

Immutable standards (was Re: CP/M clones & compatible OSes)

by tshoppa＠wmata.com

>> I believe both units were made long befroe there _were_ CF or SD cards, >> so I don't see how they could have used them :-) > They were, yes, but then again, there are SD and CF interfaces for > earlier devices such as the ZX Spectrum now, so it is doable. >> Both have RS232 ports, don't they? Surely you can get text off them that >> way? > As I said - an /easy/ way to move data. As I have said before, to your > bemusement or incredulity, I really detest RS232 and have done for > about 25 years now. [...] I really like USB for this. I would propose, as an immutable standard medium for cctalk-relevant micros and some minis, neither SD, nor CF, nor USB. I would propose 110 Baud ASCII via 20mA current loop. Of course that starts off the religious wars as to whether that key in the left corner of the Model 33 ASR is properly labeled "ESC" or "Alt Mode". Tim.

12 years, 3 months

Autofax Corp Imager, backup PC to VCR tape

by tshoppa＠wmata.com

> I've got this old 8-bit ISA card on my "interesting to try out" list. > Corvus had a videotape backup and then later a device called the Bank, > but the processing for what hardware I saw was "dumb" just support > logic. The cpu of the PC did the heavy lifting. > The Bank used a corvus network node, I think to communicate, so there > was only a corvus net card in the backup server and software to support > the bank hardware. > I think Alpha Micro had a product too. Their surplus showed up here in > Orange County for a while when they crashed and burned but no software, > sorry, also they had no coprocessor either. And a little higher up on the mini scale, Digidata had a product called the "Gigastore" that was a VHS tape unit interfaced by a Q-bus card and a variant of the Pertec Formatted (two 50 pin cable) tape interface popular for 9-track and some other drives. I used and recovered data from these way back in the 90's. Tim.

12 years, 3 months

Autofax Corp Imager, backup PC to VCR tape

by stephen.hunt＠iname.com

I've got this old 8-bit ISA card on my "interesting to try out" list. It's a z80 based "backup to VCR" card by Autofax Corp Imager. The only problem is I've got no software for it. Can anyone help? Interestingly, a dump of the eprom show the text "'MaBr[2.4] (C) 1983-Corvus Systems". Most of the references on the web for this are just adverts http://books.google.co.uk/books?id=0...page&q&f=false http://books.google.co.uk/books?id=0DsEAAAAMBAJ&pg=PA28&lpg=PA28&dq=%22auto…

12 years, 3 months

monitor arcing?

by rampaginggreenhulk＠yahoo.com

nicotine stained fingers? ------------------------------ On Thu, Aug 30, 2012 2:47 PM PDT Fred Cisin wrote: >> > dark powdery residue around power switch. 1986. Simple arcing or an >> > indication of something worse? >> It might also be dried up contact grease.Dwight > >grimy users? > > >

12 years, 3 months

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test-drb August 2012