test-drb April 2007

test-drb@ccmp.vtda.org

257 participants
560 discussions

by ajp166＠bellatlantic.net

> >Subject: Re: Junkbox CP/M system? > From: Jules Richardson <julesrichardsonuk at yahoo.co.uk> > Date: Mon, 23 Apr 2007 18:47:34 -0500 > To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> > >Chuck Guzis wrote: >> Just buffer some data and address lines off for a floppy or IDE > > interface > > From a programming point of view, how easy is accessing IDE compared to a >typical FDC ('765 or similar)? I did write some assembler to access an IDE >drive about 12 years ago, but have long since forgotten details! :-) IDE (or CF) is easier than floppy. First, it's buffered so you do not have the tight timing problem of FDC data transfer rates. Second, the the interface is around the same as for an PPI or serial port more or less. Allison

17 years, 2 months

KY11 - ever debug one?

by brad＠heeltoe.com

I could swear there was a discussion recently (like in the last week) about 11/34 consoles and KY11 documentation. Or maybe I dreamed that up. Anyway, it prompted me to try and figure out why my 11/34 console was blank. The serial monitor works fine, as does the cpu, but the "digits" in front are blank and only the run and dc-ok lights are on. (this is a symptom described in the ky11 documenation - thank you very much to whomever scanned that in) Has anyone debugged a dead KY11 ? Any hints? I looked at the docs and schematics and followed the wise words on page 8-2 titles "M7859 FAILURES" I have +5 and -9 on the 8008 as well as clock(s). But the "INTR" line (pin 18) is stuck high. I assume this is the problem. [aside - I plugged one of the cables (J3) in backward and got the display to show all zeros', but the scan rate was *very* slow, light 10hz; I found that interesting] STOP L and TS1 L are inactive, as are all the S0,S1 & S2 on the 8008. Interestingly ping 14 is wiggling. I don't have a databook with with an 8008 in it and that pin is not labeled. I have only just started, but I'd thought I'd ask if anyone has done this recently. It's fun debugging ttl. It's all so *slow* and manageable ;-) -brad

17 years, 2 months

Lack of 8-bit threads (was Re: Linux question)

by classiccmp＠memory-alpha.org.uk

Hi, > A European PC with a CGA card will output 60Hz NTSC video.... Whilst this is perfectly true, IIRC the IBM CGA monitor takes the "RGBI" signal produced by the card, not the composite one. I believe that the composite output was intended primarily for driving a modulator to allow the use of an ordinary TV with the system. Almost none of the "clone" CGA cards I've come across over the years support the composite video output. TTFN - Pete.

17 years, 2 months

Junkbox parts...

by dm561＠torfree.net

A couple of relevant sites: http://www.csd.uoc.gr/~hy325/spring-2006/docs/8042.pdf http://www.beyondlogic.org/keyboard/keybrd.htm mike ******************************** Date: Mon, 23 Apr 2007 15:19:55 -0700 From: "Chuck Guzis" <cclist at sydex.com> Subject: Re: Junkbox parts... On 23 Apr 2007 at 11:29, Allison wrote: > Can these parts (PC AT keyboard interface) can they be used for > small system as a interface from AT or PS2 keyboard to a 8bit micro. > Right off I suspect yes. However is there any information on how > to "talk" software wise to them as to what kind of results and > commands they take? It's all described in pretty decent detail in the PC AT Techref. Look in the "System Board" section. When I first saw it, I wondered why the IBM writers had wasted so much paper on it. Cheers, Chuck

17 years, 2 months

CP/M survey

by mtapley＠swri.edu

DEC Rainbow (8087, 832k (max for -A model), but that's irrelevant to CP/M-80).

17 years, 2 months

Lack of 8-bit threads (was Re: Linux question)

by classiccmp＠memory-alpha.org.uk

Hi, >(....I'm partial to just about any MC68k series systems that didn't >come from Cupertino). Personally, I'm partial to just about any machine which isn't hamstrung by being based around the lousy, prehistoric x86 architecture.... ;-) TTFN - Pete.

17 years, 2 months

HP MUX cable.

by trasz＠freebsd.org

Does anyone have the pinouts (schematics) for cable to connect HP 9000 E25 with MUX (MDP)? E25 has a strange four-row socket (called DB78, afaik), and MDP has normal DB9. I'd like to get this machine to work, and it's the only way to get a console. Thank you :-) -- If you cut off my head, what would I say? Me and my head, or me and my body?

17 years, 2 months

Jim Willing? Are you out there?

by mkepp＠hevanet.com

Sellam; If you find him, let me know, as he screwed me out of $670, and quite a few others as well. I've tracked down his father in law, who claims to not be responsible for all the people he has screwed. Mark

17 years, 2 months

166MHz Alpha Multia for sale... Cheap...

by woyciesjes＠sbcglobal.net

Time to trim the excess. Wish I had time & space for it. It's in the New Haven CT. area. I'd prefer not to ship, but I will... Make me an offer. IIRC, floppy, external SCSI riser, 64MB (I think) RAM, no HDD, slide-cover over the floppy disk. Also, I do believe I have a spare chip for the one that tends to fry. Dead tree documentation in binders included... -- --- Dave Woyciesjes --- ICQ# 905818 --- AIM - woyciesjes "...Talking to you is like clapping with one hand." Anthrax, "Caught in a mosh"

17 years, 2 months

SGI Reality Monster drives/OS?

by legalize＠xmission.com

Anyone know where I can get appropriate hard drives (don't know yet if I have the associated sleds) and OS media for an SGI Reality Monster Onyx2? -- "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, 2 months

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test-drb April 2007