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Fire in the Valley

by mallison＠konnections.com

I just lucked onto a second copy of "Fire in the Valley" Anyone _NEED_ this? -Mike

28 years, 4 months

old SCSI controller

by peacock＠simconv.com

-John Rollins typed: > >>OK, does anyone know what this card came from? Anyone know what uses and 86 >>pin bus? This is from vague memory, but if the card is roughly the same size as an S-100 card (5 x 10 inches) and has an 86 pin bus connector, I think it might be an old Motorola bus. I don't remember what they called it, never used Motorola development systems, but it was Motorola's answer to Intel's Multibus.

28 years, 4 months

North Star Horizon

by Marty＠itgonline.com

Joe, I don't know if software is available but will ask. Does the NS horizon use a S-100 bus? I was told the unit I'm (hopefully) about to acquire has an internal 10MB hard drive. i'm going to go eyeball the unit within the next few days. Marty ______________________________ Reply Separator _________________________________ Subject: Re: North Star Horizon Author: classiccmp(a)u.washington.edu at internet Date: 2/24/98 1:00 PM Marty, I have some manuals for the NS Horizon; disk controller, DOS, BASIC, Pascal. I'm looking for the software. Joe At 12:36 PM 2/24/98 -0500, you wrote: > Does anybody have any information on a North Star Horizon? I may be > acquiring one of these soon but don't know much about it except that > it has wooden side panels and used to support a half-dozen terminals. > Is it a S-100 bus? > > Thanks for any help- > > Marty Mintzell > > ------ Message Header Follows ------ Received: from lists3.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1998Feb24.130031.1767.28490; Tue, 24 Feb 1998 13:00:34 -0500 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists3.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.05) with SMTP id JAA14977; Tue, 24 Feb 1998 09:53:52 -0800 Received: from mxu2.u.washington.edu (mxu2.u.washington.edu [140.142.32.9]) by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.05) with ESMTP id JAA53378 for <classiccmp(a)lists.u.washington.edu>; Tue, 24 Feb 1998 09:53:44 -0800 Received: from star1.intellistar.net (star1.intellistar.net [206.105.64.2]) by mxu2.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.09) with ESMTP id JAA05718 for <classiccmp(a)u.washington.edu>; Tue, 24 Feb 1998 09:53:43 -0800 Received: from lizard ([206.105.68.41]) by star1.intellistar.net (Post.Office MTA v3.1 release PO203a ID# 0-41809U2500L250S0) with SMTP id AAA22727 for <classiccmp(a)u.washington.edu>; Tue, 24 Feb 1998 12:53:39 -0500 Message-Id: <3.0.1.16.19980224125410.0877b306(a)intellistar.net> Date: Tue, 24 Feb 1998 12:54:10 Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: Joe <rigdonj(a)intellistar.net> To: "Discussion re-collecting of classic computers" <classiccmp(a)u.washington.edu> Subject: Re: North Star Horizon In-Reply-To: <1998Feb24.123503.1767.83436(a)smtp.itgonline.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: rigdonj(a)intellistar.net X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN

28 years, 4 months

North Star Horizon

by Marty＠itgonline.com

Joe, Thanks for the information. I'm located in northern Virginia just outside Washington, D.C. Marty ______________________________ Reply Separator _________________________________ Subject: Re: Re[2]: North Star Horizon Author: classiccmp(a)u.washington.edu at internet Date: 2/24/98 5:07 PM Marty, I think it uses the S-100 bus. According to their manual, North Star used the same disk controller in the Horizon that they sold for the S-100 systems. I have a NS S-100 controller. They are the same electricaly and software wise but maybe physically different. Sounds like a neat system, I've never heard of one having a hard drive. Keep me posted. BTW where are you? I'm in Orlando, Florida. Joe At 01:10 PM 2/24/98 -0500, you wrote: > Joe, > > I don't know if software is available but will ask. Does the NS > horizon use a S-100 bus? I was told the unit I'm (hopefully) about to > acquire has an internal 10MB hard drive. i'm going to go eyeball the > unit within the next few days. > > Marty > > >______________________________ Reply Separator >_________________________________ >Subject: Re: North Star Horizon >Author: classiccmp(a)u.washington.edu at internet >Date: 2/24/98 1:00 PM > > > Marty, > > I have some manuals for the NS Horizon; disk controller, DOS, BASIC, > Pascal. I'm looking for the software. > > Joe > > At 12:36 PM 2/24/98 -0500, you wrote: > > Does anybody have any information on a North Star Horizon? I may be > > acquiring one of these soon but don't know much about it except that > > it has wooden side panels and used to support a half-dozen terminals. > > Is it a S-100 bus? > > > > Thanks for any help- > > > > Marty Mintzell > > > > > > > ------ Message Header Follows ------ > Received: from lists3.u.washington.edu by smtp.itgonline.com > (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) > id AA-1998Feb24.130031.1767.28490; Tue, 24 Feb 1998 13:00:34 -0500 > Received: from host (lists.u.washington.edu [140.142.56.13]) > by lists3.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.05) with SMTP > id JAA14977; Tue, 24 Feb 1998 09:53:52 -0800 > Received: from mxu2.u.washington.edu (mxu2.u.washington.edu [140.142.32.9]) > by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.05) with ESMTP > id JAA53378 for <classiccmp(a)lists.u.washington.edu>; Tue, 24 Feb 1998 > 09:53:44 -0800 > Received: from star1.intellistar.net (star1.intellistar.net [206.105.64.2]) > by mxu2.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.09) with ESMTP > id JAA05718 for <classiccmp(a)u.washington.edu>; Tue, 24 Feb 1998 09:53:43 > > -0800 > Received: from lizard ([206.105.68.41]) by star1.intellistar.net > (Post.Office MTA v3.1 release PO203a ID# 0-41809U2500L250S0) > with SMTP id AAA22727 for <classiccmp(a)u.washington.edu>; > Tue, 24 Feb 1998 12:53:39 -0500 > Message-Id: <3.0.1.16.19980224125410.0877b306(a)intellistar.net> > Date: Tue, 24 Feb 1998 12:54:10 > Reply-To: classiccmp(a)u.washington.edu > Sender: CLASSICCMP-owner(a)u.washington.edu > Precedence: bulk > From: Joe <rigdonj(a)intellistar.net> > To: "Discussion re-collecting of classic computers" > <classiccmp(a)u.washington.edu> > Subject: Re: North Star Horizon > In-Reply-To: <1998Feb24.123503.1767.83436(a)smtp.itgonline.com> > Mime-Version: 1.0 > Content-Type: text/plain; charset="us-ascii" > X-Sender: rigdonj(a)intellistar.net > X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN > > ------ Message Header Follows ------ Received: from lists3.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1998Feb24.170757.1767.28555; Tue, 24 Feb 1998 17:07:58 -0500 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists3.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.05) with SMTP id OAA07336; Tue, 24 Feb 1998 14:01:10 -0800 Received: from mxu1.u.washington.edu (mxu1.u.washington.edu [140.142.32.8]) by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.05) with ESMTP id OAA35550 for <classiccmp(a)lists.u.washington.edu>; Tue, 24 Feb 1998 14:01:03 -0800 Received: from star1.intellistar.net (star1.intellistar.net [206.105.64.2]) by mxu1.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.09) with ESMTP id OAA11194 for <classiccmp(a)u.washington.edu>; Tue, 24 Feb 1998 14:01:02 -0800 Received: from lizard ([206.105.66.22]) by star1.intellistar.net (Post.Office MTA v3.1 release PO203a ID# 0-41809U2500L250S0) with SMTP id AAA26712 for <classiccmp(a)u.washington.edu>; Tue, 24 Feb 1998 17:00:54 -0500 Message-Id: <3.0.1.16.19980224170000.376726fc(a)intellistar.net> Date: Tue, 24 Feb 1998 17:00:00 Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: Joe <rigdonj(a)intellistar.net> To: "Discussion re-collecting of classic computers" <classiccmp(a)u.washington.edu> Subject: Re: Re[2]: North Star Horizon In-Reply-To: <1998Feb24.130843.1767.83458(a)smtp.itgonline.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: rigdonj(a)intellistar.net X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN

28 years, 4 months

front panels

by allisonp＠world.std.com

<But surely this is a limitation of the front panel not the processor. <I/O bus cycles can (easily) be generated from an appropriately designed <front panel. Processor. The 8080 CPU does I/O To/From the accumulator which is inaccessable from the front pannel being an internal register. An altair did things by forcing a jump(C3h, xx, zz) the address switches were used as zzxx forcing the PC to take the set value. Data at a given MEMORY address was displayed as a result of the current address and stopping before the next instructing fetch. Writing to MEMORY was simply gating the data switches and forcing a write pulse (no cpu execution). Its design was to allow insetion of code into memory and examination of memory as those were direct. IO however while it would be nice to interogate or write to devices could leave the cpu "out of sync" since all IO is done from the accumulator. To do that you really need a soft front panel and once you do that, displaying or altering the Acc, BC, DE, HL and SP registers and associated flags are possible. Did my fair share of 8080/8085/z80 designs in the '70s. Allison

28 years, 4 months

Slow But OK

by jrkeys＠concentric.net

Again things have slowed down but a few goodies were found: A Rockwell AIM65 4k computer inside what looks like a large calculator case that is black and grey in color, has a onboard thermal printer using calculator size paper, not tested yet, free; also got 6 R6500 mb's some are marked as being bad all free; a Mac IIcx missing HD and memory simms for free; a working Mac SE/30 without KB and mouse for $15; a Victor 386sx/20 laptop broken screen with power adapter for free. Other manuals gotten at thrift stores and some software that's been the week. Keep Computing - John

28 years, 4 months

BBC Model B - video help

by Philip.Belben＠powertech.co.uk

Tony Duell quoted me as having written: >> On the subject of BBC video problems, it occurs to me that the BBC micro >> does scrolling by moving the pointer to the start of the screen (under >> some conditions?). If you can get it to do this, and see how the >> display behaves, you may be able to determine easily if it's an >> addressing problem. > > Is this going to tell you very much? > > The BBC _does_ use hardware scrolling (it changes the start-of-memory > register in the 6845), but as the screen is a contiguous array of bytes, > all that a scroll does is effectively increment that pointer by the > number of bytes/line of characters (= 640 bytes in mode 0, etc) and then > clear the new bytes displayed on the bottom line. > > So the new line 0 will be the old line 1, etc, but there are no other > changes. A given byte on the screen is displayed in the same relative > position to other given bytes on the screen. In mode 0, &3281 is still the > second dot row of a character in the far left column. Of course if the > text goes all over the place on a hardware scroll then you can be > virtually certain that the 6845 is playing up. What I meant was that addressing problem _external_ to 6845 generally means that the fault will occur at the same _memory_ address. So that type of scrolling means the fault will scroll up the screen, appearing at the same place in the _text_ every time. Won't it? If the screen line length were an integer power of two, a fault in the bottom few address lines would appear at the same place on every line. Fortunately the BBC micro is 80 characters per line, so you will see things recurring on a slant. This slanted line of fault should move up the screen as it scrolls. Something to try, anyway. I am a firm believer in non-invasive tests! Philip.

28 years, 4 months

Weekend Additions

by fmc＠reanimators.org

Sam Ismail <dastar(a)wco.com> wrote: > First stop: Computer Recycling Center [list elided] Hmph. I stopped by weekend before last (14 Feb) and it looked like they'd been cleaned out. Even the bookshelves were mostly empty. Probably for the best though, given how far behind I am with other stuff that needs doing. > Corvus Systems Hard Drive unit - I believe this goes with the rest of the > Corvus Concepts computer. It has several connectors on the back labeled > "Processor", "Drive"...it also has one labeled "VCR" and a video IN and > OUT jack. McFrank, this is so you can backup to a VCR right? Yep, that's what it's for (although the hard drive could have been used with about a half-dozen different kinds of systems, not just the Concept). I'm not sure whether the jacks imply the presence of whatever you actually need to do the backup or whether there is additional hardware or software required (this is one of those things that I know I need to figure out some day when I get all those manuals in front of me at once). -Frank McConnell

28 years, 4 months

front panels

by allisonp＠world.std.com

<> The Intellec MCS8i and the PDP11 (obviously, since all I/O is memory <> mapped) do allow you to access I/O devices directly from the panel. < <...and the front panel on the Altair 8800b. The 8008 does not have memory mapped IO, there are distinct IO instructions. It's not to say MM/io is not done. The PDP-11 memory and devices are the same things and there are no specialized IO instructions. The altair...(8800 and 8800a) from the front pannel there is no way to interrogate an port mapped IO device or write to it. You must do it with a little code. Allison

28 years, 4 months

PDP diagnostic card (was Found a decent use for a PC...)

by rcini＠email.msn.com

On Mon, 23 Feb 1998 20:14:09 +0000 (GMT), Tony Duell <ard(a)p850ug1.demon.co.uk> wrote: >>I have a text file somewhere explaining how to make a functional copy of >>this unit using more modern parts (LEDs and ULN2803 driver chips, I >>think) if anybody wants it. If you can put your hands on that text file, I'd be interested in it. Thanks! ------------------------------------------------- Rich Cini/WUGNET <nospam_rcini(a)msn.com> (remove nospam_ to use) - ClubWin Charter Member (6) - MCP Windows 95/Windows Networking

28 years, 4 months

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