test-drb

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101090 discussions

by sinasohn＠ricochet.net

At 11:36 PM 6/21/98 -0700, you wrote: > >Ok Atari-heads, what the hell is an SLMC804 Laser? It looks like some >sort of SCSI adapter. Its an external device the size of an external >modem. The SLM804 Laser Printer was Tramiel's attempt at a laser-for-the-masses back when a Laser Printer was a multi-thousand-dollar item. It had no on-board intelligence or memory; it used the ST's CPU/RAM. Sounds like what you have there is the controller interface. (Plugs into the ACSI port on one end and the printer on the other.) P.S., anyone want an SLM804 in need of some repair? --------------------------------------------------------------------- O- Uncle Roger "There is pleasure pure in being mad roger(a)sinasohn.com that none but madmen know." Roger Louis Sinasohn & Associates San Francisco, California http://www.sinasohn.com/

28 years, 2 months

IMSAI 8080

by peacock＠simconv.com

> Yes, I wonder how many of these 'collectable' computers > are in any sense being preserved properly. I would doubt > if ROMs were ever backed up or PSUs tested. Hmm, IMSAI's didn't have ROMs (or PALs and FPGAs, programmable logic had yet to be invented), unless you added them in yourself. As for checking the power supply, an IMSAI was extremely easy to eyeball...huge transformer, diodes, and beer can size capacitors. One problem I never had with IMSAIs was in the power supply, the design was right out of Electronics 101, nothing beats a big lump of iron for simplicity. Now rust might be a problem... Actually, the only real problem I've ever found with S-100s is the bus connectors wearing out. I have an old Ithaca Intersystems DPS-1 in need of a replacement Morrow motherboard. Well, not really in a hurry to fix it, all the Ithaca boards have been in the IMSAI for the last 10 years, but I hate to throw out the DPS-1 since it had the neat front panel with the PDP style toggle switches. Jack Peacock

28 years, 2 months

MicroVAX 2000

by allisonp＠world.std.com

<VMS 5.5-2 installation. I really don't know about the resistor board, <though -- I'm afraid I've never seen one. It's there to load the switcher, a disk will do that too! Allison

28 years, 2 months

MicroVAX 2000

by allisonp＠world.std.com

< A uVAX 2000 uses MFM drives, either a <Microplis 1325/DEC RD53 (70MB) or a Maxtor 2190/DEC RD54 (159MB). In <order to load VMS you really need the RD54, 70MB is too small. The HD You can load v5.4 on to a RD53 if DECwindows is tailored off. You get about 20k blocks that way. A RD54 is better though. I have three of them, nice uVAX two running VMS (rd53), one Netboots off the 3100m76. The third has ultrix V4.2 in rd53(70mb). Allison

28 years, 2 months

available 8" disks

by allisonp＠world.std.com

<Next question? WFERE is 'local'?? I keep forgetting that no matter how often I've posted my location it's never read... Eastern MA about 25 west if boston. Allison

28 years, 2 months

Apollo again.

by DSEAGRAV＠toad.xkl.com

How nice: Both of the video cards I got are toast. One acts completely dead, the other shows a series of red vertical bars about .25" apart, with crap in between. Apparently, these were decommissioned for a reason... -------

28 years, 2 months

MicroVAX 2000

by peacock＠simconv.com

> This one is a Model 625NT-AA, and comes without harddisk. It appears that there is a resistor board installed to provide a load comparable to the drive on the power supply. According to a rather sketchy spec sheet that I d/l'd from DEC, it can handle a maximum 318mb local disk. Based on the 53C80 chip installed, I presume that the drive should be SCSI. > Not exactly, the SCSI port is only for a tape drive, a TK50Z (an early ancestor to modern DLT drives). A uVAX 2000 uses MFM drives, either a Microplis 1325/DEC RD53 (70MB) or a Maxtor 2190/DEC RD54 (159MB). In order to load VMS you really need the RD54, 70MB is too small. The HD controller is the 40 pin SMC chip on the motherboard. Oddball MFM format, not compatible with WD HDCs, but the 2000 has a formatter in the ROM. The 318MB figure comes from using two RD54 drives (159 each). > At the rear of the machine are three sub-D connectors, one each 25-pin, 15-pin, and 9-pin. What are their functions? The 15 and 9 are presently encumbered by a plugin box that has three RJ45(?) connectors. Network link? > The 25 pin is the TTA2 port, RS423 (close to RS232) with full modem support (sort of). The 9 pin is TTA3:, another RS423 serial port for a local printer or terminal, but not wiored like a PC 9 pin serial. The 15 pin is for a workstation cable and carries the video (the coax connector on the little box), plus a keyboard and mouse connector (TTA0: and TTA1: serial ports). They are not RJ45s. You should also have a BNC coax connector for 10Base5 thinwire ethernet. For more info check the comp.os.vms and comp.sys.dec newsgroups, they have lots of FAQs for uVAX 2000s. I don't know the URLs but if you post a question on one of the ngs they will direct you to the web page. BTW, I might have an expansion memory board left for a uvax 2000, i'll check the old DEC scrap box. IIRC it brings one up to either 8 or 14MB of RAM. (a uVAX II maxes out at 16MB of RAM) Jack Peacock

28 years, 2 months

new additions, info wanted

by g＠kurico.com

More fun stuff picked up this weekend: Canon Cat - A glorified word processor that was created by one of the original members of the Macintosh team. Mentor Graphics badged Apollo DN300 workstation. Whole box of Apple II cards and other misc stuff. Anyone have any info the the Canon Cat? Or manuals/software for the Apollo? Oh, I also have a couple of AT&T 6300 cpu's that I'll give to anyone who wants them (don't know if they work, don't have time to check them out). I also have a AT&T 3B2-310 with external expansion unit (XM something or other) for sale or trade, make me an offer I can't refuse :) BTW I'm in Austin, TX. George

28 years, 2 months

Intelus/NEC laptop

by gpine＠gri.org

I recently acquired a laptop that appears to be an NEC PC-8201 with a label of a company named Intelus on the front where the PC-8201 label would be. There is also a serial number label on the back that lists the address of Intelus as in Rockville, Maryland. In addition, it has a miniature connector labeled phone on the back in place of the second SIO connector (maybe the unit has an internal modem? I haven't opened it up to check), and it has an additional small removable panel on the back that provides access to an edge-card connector on the motherboard. My machine has nothing plugged into this connector. The machine fires up showing BASIC, TELCOM, and TEXT programs in ROM, and the BASIC program even says PC-8201 Basic, verson 1.1. The machine is in all other respects (keyboard, display, battery pack, ROM access, and external connectors) identical to my PC-8201. Is anyone familiar with this machine?

28 years, 2 months

Quarter classics (was: Big Iron Was:RE: Backwater areas Wa

by sinasohn＠ricochet.net

At 08:01 PM 6/18/98 +1, you wrote: >Robotron ? > >Talking about the East German Computers ? Robotron is also a video game ca. 1981-2 (Williams, iirc) that was semi-unique in that it used dual joysticks -- one to control movement and one to control firing direction -- and in order to be at all successful at the game one had to be able to operate the two completely independantly of each other. Other, similar games included Sinistar (no relation, and don't even go there) and one whose name I forgot that had to do with spiders and webs. --------------------------------------------------------------------- O- Uncle Roger "There is pleasure pure in being mad roger(a)sinasohn.com that none but madmen know." Roger Louis Sinasohn & Associates San Francisco, California http://www.sinasohn.com/

28 years, 2 months

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