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101090 discussions

8008 disassembly for 1972-73 SacState DOS/PROMs?

by bdamer＠digitalspace.com

Hi CC Techers, Dwight Elvey visited here the other day and dumped the contents of the eight 1702 PROMs that are the heart of the Digibarn's 8008 system built by Bill Pentz and team at Sacramento State in 1972-73. It might have drivers and code for their "DOS" which supported a serial interface, hard disk, Tektronix 4023 and interpreter for mainframe 370 IBM BAL. It might be junk or nothing. If there was something there it would be the "earliest" such code for a microcomputer and very valuable historically. The SacState 8008 story can be seen at: http://www.digibarn.com/stories/bill-pentz-story/index.html and we would love to add the disassembled code to this ongoing project. If you are interested in trying to disassemble this and interpret what this code represents please email me directly at: bdamer at digitalspace.com and I will send you the binaries. Bruce cc Dwight

15 years, 7 months

PDP-11/44 mystery card

by bqt＠softjar.se

Pontus Pihlgren <pontus at Update.UU.SE> wrote: > Hi > > I've acquired two PDP-11/44 and have just now gone throught the list of > cards in the cpu-boxes and the spares. Here is a list: > > http://www.update.uu.se/~pontus/slask/11-44-kort.txt Nice! You'll be able to put together atleast one really nice 11/44 from that. I notice one FP11 in the list. > Also I wonder what the > "M7251 KG11-A U Network interface XOR and CRC block check option" Just what it says, Network interface XOR and CRC block check option. :-) Ok. The long answer then... You know about CRC-16 I assume? This is hardware to generate that. You shove data to the card, one word at a time, and you can read out the CRC value. This card is, however, not very popular or useful, since software CRC routines are actually faster on the PDP-11. DECnet can use this card if you have it, but it's recommended that it not be used for this fact. (The card is actually more generic, and can be used to generate any kind of CRC checksum, not just CRC-16.) > "M3110 DRCSA U Protocol assist #1 w/special character check and CRC (DEC/DLC/DRCSA)" > "M3111 DRCSA U Protocol assist #2 w/special character check and CRC (DEC/DLC/DRCSA)" No clear idea about those two... Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

15 years, 7 months

Microwriter MW4 help

by john_a_s2004＠hotmail.com

Hi, I recently obtained a Microwriter with an LCD display. It turns on and displays MW4/10, with an 'f' in the right of the display. I can enter letters, but after about 8 it locks up and I need to power cycle (using the white button), which resets the unit as above. I think 'f' is a mode, I think it was 'I' originally (but I can't find a way to change it!). I hope it stuck in some mode or waiting for serial input, can anyone help with command sequences please? Else it may be faulty, I found Tony's post from 2009 asking for a 'good' EPROM image, maybe mine is failing in a similar way. Regards, John

15 years, 7 months

NEC D75008 MCU

by hilpert＠cs.ubc.ca

I just ran across an NEC D75008 microcontroller in a small photo copier ca. 1990. According to a search it is a 4-bit microcontroller. Idle curiousity, but does anybody know if this has any inheritance from or relation to better-known microcontrollers such as the TMS1000, that is, is it NEC's version of something better known?, or is it NEC's own architecture?

15 years, 7 months

Minolta MS3000 Microfilm Scanner

by wulfcub＠gmail.com

On Thu, Sep 2, 2010 at 10:09 PM, Zane H. Healy <healyzh at aracnet.com> wrote: > Does anyone happen to know where to get parts for one of these? At a > minimum I need lenses to get it working. > > Zane > Talk to Ken Hansen with Imaging Systems - 608-276-5559 or Dick Svehla at All Micrographics & Scanning - 352-684-1159. Both are pretty resourceful and tend to have a lot of assorted microfilm gear and parts on hand. If neither of them can help you out, let me know, and I'll dig a little deeper into my contacts list to see who else I can find. --Shaun -- "If you live to be a hundred, I want to live to be a hundred minus one day, so I never have to live without you." -- Winnie The Pooh http://www.lungs4amber.org

15 years, 7 months

walking through an IBM shop in 1990

by dgriffi＠cs.csubak.edu

On Youtube I found a video of some guy walking through an IBM mainframe installation showing the viewer a bunch of stuff. http://www.youtube.com/watch?v=hdNxaRa4roo Does anyone here know of similar videos for, say, a DEC installation? -- David Griffith dgriffi at cs.csubak.edu 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?

15 years, 7 months

[for sale] IBM 5100 + IBM 5120

by nick.allen＠comcast.net

Hi, Is the IBM 5100 and 5120 still for sale, if so I am very interested, please let me know either way, thnx! Nick

15 years, 7 months

Apple Lisa 1 for sale

by sellam＠vintagetech.com

I have an Apple Lisa 1 for sale. Yes, it has the Twiggy drives. It includes the Twiggy systems OS disks (2), original Lisa 1 manual, keyboard, original Lisa (rectangular button) mouse. It works. Excellent condition. Normally I would not so brazenly hawk something but I need to raise funds for an imminent move of the VCF archives. I'm entertaining any and all offers. At a minimum, there should be three zeroes before the decimal point. Please contact me directly if you're interested. Photos and more detail will be forwarded upon request. Will ship galaxy-wide. Thanks! -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

15 years, 7 months

road trip, east coast

by mcguire＠neurotica.com

Hey folks. I realize this is short notice, but on Tuesday the 7th I'll be hitting the road from Port Charlotte, FL (Gulf coast south of Tampa) and driving a mostly-empty 16' box truck up to the Washington DC area. I am willing to transport stuff along that route, within a reasonable distance of the 95 corridor, for reasonable compensation. In the middle of the following week, likely around the 14th, I'll be driving back down the same route. I will have less space available then, but I should have some free room. Contact me directly via email if interested. -Dave -- Dave McGuire Port Charlotte, FL

15 years, 7 months

Exploring the world of minis and mainframes...

by madcrow.maxwell＠gmail.com

I'm thinking of doing a little write-up/summary on the emulation/exploration of classic mainframe and minicomputer platforms and I was wondering what all is available to folks both in terms of host platforms (emulators and affordable real iron) and software. I know that DEC stuff (especially PDP-8, PDP-10, PDP-11 and VAX stuff) is widely available, as is a lot of early IBM stuff (360 and early 370 era) and even there's even a little bit available for things like the Interdata minis, the HP 2100 and (if you know the right people) the CDC 6x00/Cyber x70 systems. In addition, I've heard that a whole bunch of Data General software has been authorized for release to hobbyists, but work on that project is rather slow. Apart from what I've mentioned, is there anything else that's either available or "in the pipeline" or have I got it all? Mike

15 years, 7 months

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