test-drb

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101090 discussions

by holm＠freibergnet.de

Hi folks, I have an HP1631D Logic Analyzer for some years now und got an HP9121 dual Floppy drive that fits to it yesterday. I've tested the drive, formating disks, storing and reading data ist working :-) While reading the Users Manual of the LA I've found out that besides of storing setup- and configuration data on the disk, there should some loadable disassemblers for the HP1631D exist on floppies.. The Logic Analyzer is very limited from todays point of view but for example an Z80 disassembler where nice to have. Has someone out here such disassemblers (Z180, 8085, 8080, 6809 etc) for the HP1631D? BTW: My unit has an "upgraded from HP1630" printed on the faceplate.. are there possibilities to upgrade it further? More Memory etc? ..same Question for the Dolch (DLI) C100D, there should exist some ROM based Disassemblers and I'm looking fors uch Eprom Contentes. Currently I have additionally two Dolch 64300 with some additional Software here, but the Eproms don't fit in to the later C100D. Thats ugly, since the C100D is much smaller.... Regards, Holm -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583 info at tsht.de Fax +49 3731 74200 Tel +49 3731 74222 Mobil: 0172 8790 741

8 years, 4 months

HP1631D Logic Analyzer..Software???

by shadoooo＠gmail.com

hello, somewhere around I should have a floppy with disassembler for HP1660 series. I suppose it is useless for 1630... or not? Should I give a look to find it? Andrea

8 years, 4 months

TI 980 software?

by derschjo＠gmail.com

Hi all -- The TI 980B I got from that NWA auction from a month or so ago finally made its way back to my house, and the CPU looks to be in decent shape. I'll probably start working on restoring it after the new year. Bitsavers has ample documentation, but I haven't found much software at all -- I don't suppose anyone out there's got any tucked away somewhere? I've found this: http://www.cozx.com/dpitts/ti980.html which provides a nice cross assembler/linker and simulator so I guess I can write my own :). I was hoping there'd be a bit more to the system than the CPU, but the rack it came in was effectively empty apart from the CPU, a gigantic power supply and an empty backplane and card-cage. There was a stack of documentation included, so now I know that this TI was originally part of an Evans and Sutherland "NOVOVIEW 2500" -- a "Night Only View" flight simulator that used a set of point-plotting X/Y beam-penetration displays (red/orange/amber/yellow/green colors) to simulate a runway at night. (These were the DSI displays that were auctioned off as a separate lot, wish I'd known what they were at the time...) Pretty interesting, a shame all of the cool hardware was stripped out at some point. Based on the printout stuck in the Omni 800 that came with it, this was in use through at least 2000. Thanks, - Josh

8 years, 4 months

ADM-3A Lower case ROM issue

by shatle＠nfldinet.com

-------- Original Message -------- Subject: Re: ADM-3A Lower case ROM issue From: J?rg_Hoppe <j_hoppe at t-online.de> Date: Wed, December 14, 2016 9:00 am To: cctech at classiccmp.org By accident, I just now restored an ADM3 (not the "A")! Lowercase ROM was made with an pin-rearranged 2706 EPROM. Additional RAM was inserted, DIP switches were set: works perfectly. However, with lowercase ROM installed and DIP switches set, but extra RAM missing, the Space "0x20" was displayed as a " ` ". So I think you have an RAM issue. Perhaps cleaning the socketed extra RAM helps? Joerg ---- Thanks - that sounds like my symptoms exactly. I'll check out the RAM. Steve ---- Well, there you go. The sockets for two 2102 RAM chips are empty! Anybody have a couple of these guys they can spare, or a quick pointer on where to buy them? Thanks all, esp. Joerg for the tip! Steve

8 years, 4 months

Odd "endianness" [was Re: RE: Base 64 posts to the list]

by jnc＠mercury.lcs.mit.edu

> From: Rich Alderson > 9-track tapes on the PDP-10 used one of the following encodings: What about 7-track, any idea? I would assume 6 x 6-bit tape frames per 36-bit word, but that's just a guess. Noel

8 years, 4 months

WTB SS-30 FDC

by david＠thecoolbears.org

I've been looking for an SS-30 bus floppy controller for some time now. Examples would be DC2/DC3/DC4/DC5, but I would also be OK with a Pertec or SSB. Anyone have one that they would be willing to part with?

8 years, 4 months

ADM-3A Lower case ROM issue

by shatle＠nfldinet.com

8 years, 4 months

ADM-3A Lower case ROM issue

by shatle＠nfldinet.com

I acquired an ADM3-A a while back from the NWA auction, and a generous friend was able to get me the lower case ROM chip that was "missing" from my terminal. I set the DIP switches and installed the ROM. When I turned on the terminal, the whole screen was filled with "`" characters before the host was ever started. When I started up the connected Sun machine, the terminal did display both upper and lower case characters, but the "`" characters remained and appeared to fill out each new line, and text printed out by the machine was followed by garbage characters - like "Login:nzzzz". Typed characters were correctly upper or lower as typed. I removed the ROM and cleaned the legs of the chip. I didn't clean the socket, since I didn't have anything like DeOxit handy. I did remove and re-insert the ROM a couple of times. When I removed the ROM and set the DIPs back to the original setting, the terminal worked like normal in all upper case. Setting the DIPs to force upper case, etc. when the ROM was in always showed the bad behavior though the characters were upper/lower as you would expect from the switch settings. TL;DR - bad and extra characters when the ROM chip is in, everything OK when it's out. So, barring a bad connection to the chip while it's in the socket, it seems like the ROM itself could be bad. I'll dig through the maint manuals and see if I can find anything related to this behavior. In the meantime, any ideas from the collective are welcome.

8 years, 4 months

Megatek Series 7000 Graphics System?

by holm＠freibergnet.de

Hi, I've got a card cage full of cards that seems to be a Megatek Graphics Subsystem. I've found a board with coaxial connectors that seems to be the Video Output Board, a CPU build out of two stacked cards, one with 8 pcs. AM2901BC and some Memory.. One fo the card(stacks) has front connectors looking like Unibus (or QBus). There is no PSU attached to the card cage. After googeling around I think the thing is related to a Megatek 7250 graphics Terminal mentioned here an there..but no pictures could be found. Is there soemone that has more informations about that thing? The megatek is an a bad shape, Crystal oscillators are heavyly corroded on the outside, it sat for 20+ years somewhere on the Attic. I'll make some Pictures next week .. Regards, Holm -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583 info at tsht.de Fax +49 3731 74200 Tel +49 3731 74222 Mobil: 0172 8790 741

8 years, 4 months

looking for keytronics keyboard pad replacement kit

by shatle＠nfldinet.com

-------- Original Message -------- Subject: RE: looking for keytronics keyboard pad replacement kit From: william degnan Date: Wed, December 14, 2016 5:01 am To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Ok, to me it looked like they did not. The description implies one should transplant them from wherever to the replacement pads. I will ask the seller. Bill Degnan twitter: billdeg vintagecomputer.net ---- Do tell when you find out. If the metallic pads are already there, I'm probably in for a couple of sets :-) Steve

8 years, 4 months

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