test-drb June 2007

test-drb@ccmp.vtda.org

224 participants
486 discussions

by marvin＠west.net

A friend of mine has about 1200 Sq. Ft. of 2' x 2' aluminum computer flooring available. They were either made by or provided by "Floating Floor, Inc.". The pedastals and stands are not available. I haven't seen them yet, but can find out more if anyone is interested. Apparently the scrap value is about $20.00 each, so any offer would need to be enough more than that to make it worth while. If anyone is interested, let me know ASAP as these will be going to scrap *very* shortly.

17 years, 6 months

RL02 fault (OS/8)

by charlesmorris＠hughes.net

>Hmm... I don't think filesystem problems will cause the Fault light to >light up, just problems within the drive. You may need to trace back >all of the causes that sum up to "Fault" to see what's going on. I was trying to talk myself out of that one, but I suspect you're right :^P The problem I was thinking hopefully of was a checksum error caused by an aborted or other improper write... but then again the controller card and disk internal logic board probably do restrict writing by complete sectors? I'll have to download a copy of the RL02 manual from bitsavers to read while I'm sunning on my mom's terrace. Remember also that I had that problem occur once before (on my first boot and before the chip failed) but after powering everything down, removing and reinstalling the pack, powering up and rebooting (shades of Micro$hit!) it did boot to the OS/8 "." prompt and was functional at least to the point of displaying a directory... Anyway it'll be easy enough to write a simple program to display the error word on the Programmer's Panel display and backtrack from there... maybe it's a bad pack. Or a bad cable (I spent hours when I first got this drive trying to figure out why the fault light wouldn't go out, and tracked it down to a faulty clock signal from the controller card. More specifically there was a single hair-fine wire strand sticking out the bottom of my IDC connector where it plugged into the controller card and it was touching a passing trace. The original BERG conn. would not have had a clearance problem (to the butt end of cut cable) there. Although the pack (that I copied my SIMH OS/8 image onto) had no bad blocks on it that I could discern under RT-11, I wonder if there could have been some that make a difference to OS/8. I'm getting out of my depth here. Anyhow when I get home, I'll find out exactly what the error is (I never liked that idiot light precisely because it doesn' t tell you WHAT the fault IS!) -Charles

17 years, 6 months

Inside old games machines, was: Re: Simulated CP/M-68K?

by classiccmp＠memory-alpha.org.uk

Hi, > The Z80 was used in Neo Geo MVS games up until a couple years ago. As the "sound" processor, the main CPU was a 68K. TTFN - Pete.

17 years, 6 months

HP firmware identification?

by larry_s_harris＠comcast.net

Do you still have the firmware chips that your identified in your Jul 4th, 2004 note? I'm interested in part number 13307-80037. Larry Harris STAR-TEK star-tek at comcast.net

17 years, 6 months

Pictures of My Machine Room (So Far)

by ploopster＠gmail.com

Most of the hardware hasn't been cabled up yet, and the hardware that's actually running isn't pictured because it's my network core and I won't put pictures of it on the internet for security reasons... BUT... Here are pictures of my machine room. It's a work in progress, but it shows what I've done to reinforce the floor. Because I've *decidedly* exceeded the floor loading capacity. Peace... Sridhar

17 years, 6 months

Free computer bits in Montreal, Canada

by joachim.thiemann＠gmail.com

Hello, a few bits that I'd like to get rid of in exchange for empty space that would be more useful to me :-) - A 360k IBM branded full-height floppy drive pulled from an XT, a Tandon TM100-2A - An external 3.5" 720k IBM Type 4865 floppy drive - I think it came >from an early IBM portable PC - A german Apple ][e, with serial card, parallel card, disk II card and 2 drives, Microsoft CP/M card, original Apple DOS disks (3.3, some seem to be localised for germany) as well as the CP/M disk(s). I have no idea if it works, but it should. The power supply is for 220V, and I can't see a simple switch to make it take 110V. I assume putting in a regular north american PS would make it work without problem, but I have no idea if the video circuitry is any different - presumable monochrome should work with minor adjustments. This system was brought over to Canada when friends of the family immigrated, and was used with a simple 110-220V transformer. (I myself modified my C64 by swapping a crystal and replacing the PAL VIC-II with an NTSC VIC-II when I moved) Also comes with many Apple-II disks, some for CP/M - the motherboard of an old Apple ][ clone, with Z80 on the MB. Source of chips, if anything. Joe.

17 years, 6 months

Simulated CP/M-68K?

by aek＠bitsavers.org

> I have a working Sage IV and would be glad to help with a simulation project > by providing boot prom dumps, docs, etc. Thanks! Adding dumps of the programmable parts from the machines that you have to your web site would seem to be a good thing independent of any simulation efforts.

17 years, 6 months

2G SCSI-wide drives

by rtellason＠verizon.net

I have a number of 2G SCSI-wide drives on hand here (68-pin connector), and in conversation with a list member offlist it was suggested that perhaps these might be of use in certain of the older machines that a bunch of you guys have. Anybody interested in taking some of these off my hands? Feel free to drop me a line offlist... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin

17 years, 6 months

Inside old games machines, was: Re: Simulated CP/M-68K?

by aek＠bitsavers.org

> Did any of the CPUs we know and love, like the PDP-11 CPUs, find their > way into commercial games machines? Atari System II used the T11 (a giant step backwards from the 68K in the System I IMHO).

17 years, 6 months

Apple ][gs -- how to tell ROM version without booting?

by legalize＠xmission.com

Subject says it all. I have a ][gs Woz Edition but I read on the net that there are various ROM versions. How can I tell what ROM version I have without booting it up? I don't have the necessary additional hardware to power it on and see the screen or type into it (no RGB cable and no keyboard). -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

17 years, 6 months

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test-drb June 2007