test-drb

test-drb@ccmp.vtda.org

101090 discussions

TRS-80 or System-80 clock crystals in Australia?

by thrashbarg＠kaput.homeunix.org

Hi list, Would anyone know if I could get a 10.6445MHz crystal for a Dick Smith System-80 in Australia? This evening I decided to power up mine for the first time in ages, but the crystal pins were corroded through and it fell off. Cheers, Alexis K.

11 years, 10 months

Unibus/qbus wire wrap tool

by jnc＠mercury.lcs.mit.edu

> From: Roe Peterson > I need a wire wrap tool for qbus/unibus. What size for those pins? None of my current DEC backplanes have wire-wrap pins (these are all PCBs), _but_ I just measured some wire-wrap configuration pins on QBUS boards, which look to be about the same size as I recall UNIBUS backplane pins being, and those are .7mm / .025". Doesn't the tool also depend on the wire gauge? > From: Jay West > I just assumed there was only was size..... Some of the older machines (I specifically remember it being either the PDP-6 or KA-10, but I forget which) used pins (and wire) which was significantly larger than those in the PDP-11. But I think all the -11's (both busses) used pins of the same size. (I don't recall ever seeing one different, I'm pretty sure.) Noel

11 years, 10 months

Value of a Tantalum Capacitor

by jnc＠mercury.lcs.mit.edu

> From: Paul Koning > On Sep 21, 2014, at 6:31 PM, Noel Chiappa wrote: >> I have found this page: >> >> http://wiki.xtronics.com/index.php/Capacitor_Codes >> >> very helpful in deciphering capacitor markings. > That address doesn't work for me. I did notice that at one point, it only worked for me with some browsers (e.g. Firefox, IIRC), but not others (e.g IE, IIRC), for reasons I didn't fully understand. (As in, it's not that it came up but looks wrong, the page just refused to load at all. I have noticed that a number of sites, especially ones using HTTPS, don't work with all my browsers - again, total failure. Chrome gives me an error message for the HTTPS ones about 'can't match certificate', or some such, which leads me to believe that my local ISP is doing some sort of HTTP caching which is messing up with some secure sites. Or something like that... :-) But I just tried again, and now that site works with all of them. Odd. Noel

11 years, 10 months

HP 9635C System information- Just got one

by slandon110＠gmail.com

I just picked up an HP 9635C, found it on craigslist about a 1.5 hour drive from here. Rescued for a friend in upstate NY, I cant get it to boot off any of the disks that it came with, it reads then gives I/O error. Also is it easy to make boot disks for this thing and is there a source of images??, Id really like to get this thing operational before I hand it off to him Thanks Steve

11 years, 10 months

Using an 8" drive on a PC

by jnc＠mercury.lcs.mit.edu

Ooops, just realized this went to both the list, and me: > From: Chris Osborn > On Sep 21, 2014, at 3:39 PM, Noel Chiappa wrote: >> Epsilon. ("Wasau.=94) > Will it fit on a 360k floppy? Well, it depends on what OS you're talking about, and which version of Epsilon. The one I use (which is circa 1996) is Version 8, which is for Windows 95 and later, and the .exe file is 261KB, so yes - sort of. You also need a 'state file', which is all the settings, pre-loaded interpreted code, etc (most of the 'editor' is actually interpreted code - the .exe file just provides a system with underlying primitives useful for writing an editor, e.g. support for buffers, windows, etc), and that's another 180K+. So if you have two floppy drives, yes. One... not so sure... I haven't ever tried to run it without a state file, to see what it's like, but it's probably unusable. But you might be able to make a stripped-down version whose state file would be small enough to fit on a 360K floppy along with the .exe. It also has the ability to demand-load code (e.g. if you have a rarely-used function attached to C-A-^, you can cause that code to be loaded only the first time you hit C-A-^ - makes the basic state file smaller, and faster to load), and you could use that to put the code for a lot (all, if you wanted, I suppose) of the commands on a second floppy. They did make much earlier ones (I started using it under DOS, back in '87 or so), and that version is probably smaller, but I don't know how much smaller (and don't have the ability to go check - I think those files are on 5.25" floppies, and I don't have a working 5.25" drive at the moment - one more thing on the to-do list, sigh). As far as I'm concerned, it really is the bee's knees - I can't say enough good things about it. Noel

11 years, 10 months

PDP-11 floating point: Move KEF11-A from KDF11-A to KDF11-BA?

by earl＠retrobits.com

Hi there, I have a floating point processor (FPP) on a currently unused 11/23 CPU M8186 card (KDF-11A). From the manual, looks like this is a KEF11-A. Also, in my working 11/23+ with KDF-11BA, I have no FPP. Makes it hard to use Fortran-77. The KDF-11BA manual refers to a KEF-11AA FPP. Does anyone know if the FPP unit is compatible from the 11/23 to the 11/23+ - i.e., can I transplant the FPP chip from the 11/23 to the 11/23+ CPU card? Could it be that simple? :-) Please be gentle if this is a stupid question. I've used my best Google-fu and RTFMing to find the answer (and learned some new things about these cards in the process). Thanks! - Earl

11 years, 10 months

Looking for a video card for a Sparc Station 5.

by wlewisiii＠gmail.com

I have a Sparc Station 5 that I am intending to get up and running with SunOS 4.1.4 on one disk and OpenStep 4.2 on the other. The last remaining hurdle is video. The CG-3 card that is in it either is not able to push the 1024x768x77 it's supposed to or not able to talk to any of my monitors. I'm deep in the heart of flyover in Hayward WI so trying a to find another video card is easier than a different monitor. I'm looking for an S-Bus CG6 of the TGX or TGX+ versions or a Sparc Station 5 specific S24 24 bit video card. The TGX cards are supposed to be able to push a resolution of 1024x768x60 that should be able to be used by generic SVGA monitors. Thanks for your time and any assistance. William -- Live like you will never die, love like you've never been hurt, dance like no-one is watching. Alex White

11 years, 10 months

Looking for a video card for a Sparc Station 5.

by Arno_1983＠gmx.de

"Brian L. Stuart" <blstuart at bellsouth.net> wrote: > > The CG-3 card that is in it either is not > > able to push the 1024x768x77 it's supposed to or not able to > > talk to any of my monitors. > > My recollection is that the CG3 (and the CG6 as well) is a fixed > rate card for 1152x900x8 at 66Hz. > > BLS Depends a lot on the actual implementation methinks. What may be true for the original sbus card may well have changed with more modern, integrated versions. Like I said, the cg3 in a SPARCclassic natively supports at least 1152x900 at 66 and 76 Hz and 1024x768 at 60, 70 and 77 - I don't know for the SS5, but when you navigate to the framebuffer node in the OBP prompt (like /iommu at 0,1000000/sbus at 0,10001000/cgthree at 3,0) and do "words" there, anything starting with "r" followed by a mode description should be a supported mode that you can specify for output-device (like screen:r1024x768x60, which is what I would try) Beyond that, there is always the opportunity of hacking an unsupported resolution in by computing the corresponding numbers and generating a resolution setup word by yourself. They basically just contain a mode line like " 08,02,37,37,08,155,21,04,39,169,0,7,60,1024,768" (for 1024x768x60) which is a bunch of setup values that are poked into registers on the framebuffer by the setup FCode. Arno

11 years, 10 months

IBM 1052

by BHuntsman＠mail2.cu-portland.edu

Hi! Would anyone here be interested in purchasing a 1052? I acquired two of them a while back, and since I just recently moved, could use the space more than the museum piece. I assume it's in non-working condition, but it's complete, and it's a 1052... :) -Ben

11 years, 10 months

pdp BASIC-11 query

by jwest＠classiccmp.org

I'm posting this on behalf of someone not on the list. I didn't want to just open them up to tons of replies, so figured I'd just post it for him and relay any responses back. Can anyone solve his issue? He wrote.. I'm trying to get some code that was written in 1977 working again. I've gotten a PDP-11 emulator working but the version of BASIC that is on it doesn't know the 'FILE #1="DNG1' command. I've been digging through BASIC manuals for BASIC-11 and BASIC-Plus but so far they either don't have an file reading or their file reading commands don't match that syntax. Googling has led me to a few other versions of BASIC that were on the PDP-11 but I can't find manuals for them. Can you point me in the right direction? (The full code is here; https://d2sx9mrt4zumaq.cloudfront.net/wp-content/uploads/2014/04/DND1_Comple te.pdf) (And it is part of this contest; https://www.shroudoftheavatar.com/?p=39149) --- 00010 LET J4=1 00030 PRINT 00100 BASE 0 00110 LET X=0 00120 LET J=0 00130 LET K=0 00140 X1=0 00150 LET X3=0 00160 LET J9=RND(CLK(J9)) 00170 DIM C(7),C$(7),W(100),D(50,50),P(100),I$(100),B(100,6),B$(100) 00180 DIM E(100),F(100),X5(100),X6(100),X2(100),X4(100) 00190 LET G=INT(RND(0)*24+2) 00200 LET H=INT(RND(0)*24+2) 00210 FILE #1="DNG1" 00220 FILE #2="DNG2",#3="DNG3",#4="DNG4",#5="DNG5",#6="DNG6" 00230 RESTORE #4 00240 FILE #7="GMSTR" 00245 RESTORE #7 00250 RESTORE #1 00260 RESTORE #2 00261 RESTORE #3 00262 RESTORE #4 00263 RESTORE #5 00264 RESTORE #6

11 years, 10 months

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb