test-drb June 2009

test-drb@ccmp.vtda.org

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404 discussions

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Zax ICD-378 Z80 In-circuit Emulator Documentation

by mardy＠voysys.com

Does anyone have a copy of the documentation for a Zax ICD-378 Z80 emulator? Thanks, -Mardy

15 years

TRS-80 documentation

by ian_primus＠yahoo.com

--- On Sun, 6/28/09, Chuck Guzis <cclist at sydex.com> wrote: > > I distinctly remember sending PDFs of the users and > service manual of > > the TRS-80 PT-210 terminal to someone who hosts a > website of > > documentation.? I forget who that was and Google > isn't helping me. > > So, who has an archive of Tandy docs? > > If it isn't Ira Goldklang, he would certainly know who it > might be... > > http://www.trs-80.com/ Yeah, but Ira doesn't actually have any documentation on his website. He's got pictures of the covers though. Must have been somebody else. -Ian

15 years

TRS-80 documentation

by dgriffi＠cs.csubak.edu

I distinctly remember sending PDFs of the users and service manual of the TRS-80 PT-210 terminal to someone who hosts a website of documentation. I forget who that was and Google isn't helping me. So, who has an archive of Tandy docs? -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

15 years

Sun 3/50 DVMA memory error, and another 3/50 with parity error

by rescue＠hawkmountain.net

So, I have 2 3/50 boards I'm trying to resurrect. I thought one was good (passed diags with diag switch on). The other I know has a bad ram chip. The one I thought was good... gets (as one example): MEMORY ERROR! STATUS D4, DVMA-BIT 0, Context 0, Vaddr: FFE10C, Paddr: 003FC10C, Type 0 at 0FeF4C88 It gets several of D4, D2, and D1 when it attempts to boot, or if you interact with it at the boot PROM. I did try changing the large socketed (MMU + more) chips from the board with the bad memory chip... same behavior. I have not tried changing CPU, FPU, boot rom, or any PALs. As for the one with the bad ram chip, it fails quickly on power up with: Memory Parity Data Test Err 2: Addr 0x00000400, Exp: 0x00000001, Obs: 0x0080001, Xor: 0x00080000 I've not found any memory map to help me determine which chip this is. 0x00000400 is the 1024th byte of RAM... so I'd suspect the first bank... but which bank that is I don't know. Anyone have a 3/50 memory map so I know which chip to replace ? Or a good technique for figuring that out ? Thanks in advance, -- Curt

15 years

Looking for a Needham's PB-10 EPROM programmer

by les＠frii.com

As I said in the email I sent the original poster, I have at least one of these if he wants to make an offer. The only thing I can do with the PB-10 that I cant do with any other programmer are the Epson memory cards, like a PCMCIA (People Cant Memorize Computer Industry Acronyms) card with an edge connector. Les

15 years

Trouble with a M7559 TK70 Controller

by robert.jarratt＠ntlworld.com

> -----Original Message----- > From: cctalk-bounces at classiccmp.org [mailto:cctalk- > bounces at classiccmp.org] On Behalf Of Robert Jarratt > Sent: 27 June 2009 17:22 > To: 'General Discussion: On-Topic and Off-Topic Posts' > Subject: RE: Trouble with a M7559 TK70 Controller > > > -----Original Message----- > > From: cctalk-bounces at classiccmp.org [mailto:cctalk- > > bounces at classiccmp.org] On Behalf Of Robert Jarratt > > Sent: 27 June 2009 16:35 > > To: 'General Discussion: On-Topic and Off-Topic Posts' > > Subject: Trouble with a M7559 TK70 Controller > > > > Just as I got my MicroVAX II booting, the TK70 controller has started > > to > > play up and is no longer working correctly. If I try to boot off the > > tape I > > get a CTRLERR, and if I boot VMS from the network and then try to > mount > > a > > tape I get "%MOUNT-F-DEVOFFLINE, device is not in configuration or > not > > available". It was booting from tape just fine a few days ago. I can > > see > > that the controller has two LEDs on it. When I power it up they both > > come on > > but then one of them switches off leaving the other one on. The light > > that > > stays on is the one on the right when viewing the board flat, looking > > at the > > ribbon cable connector, with the component side up. > > > > > > > > I think this means its self test has failed in some way, but I cannot > > find a > > manual anywhere online to tell me. Can anyone tell me what this might > > mean? > > > > > > > > Thanks > > > > > > > > Rob > > Never mind. I cleaned the heads and the problem went away. Just a bit > surprised that this caused the errors I saw. > > Regards > > Rob Still having a few odd problems with this that I have not observed before. If I put a tape in that the TK70 does not "like" this is what happens in VMS: $ mou/over=id mua0 %MOUNT-F-DEVOFFLINE, device is not in configuration or not available And thereafter it happens even with a good tape. Any thoughts on this? Regards Rob

15 years

cheap KVM switches

by brianlanning＠gmail.com

Does anyone know of a good source for inexpensive KVM switches? Ideally, I'd like something that switches VGA, ps2 keyboards, and serial mice. I'd also like one that switches macintosh hardware, that is, the 15-pin monitor connector and ADB (if such a thing exists). brian p.s. I seem to remember asking this question somewhere in the past, but I can't remember if it was here. My apologies if this is a repeat.

15 years

Cromemco Dazzler Kaleidoscope

by wh.sudbrink＠verizon.net

I wanted to exercise my Dazzler and since I don't have joysticks yet, I wanted a non-interactive program. I looked around on the net and, while I found lots of references to it, I had a very hard time finding the kaleidoscope program itself. I finally found a paper tape image of it in a zip file on Dave Dunfield's web pages. There is a warning that there may be errors in these images so I disassembled the program to see where it should go in memory and whether it looked OK in general. The result is here: http://wsudbrink.dyndns.org:8080/kscope_dis.txt I don't claim to exactly understand how it works, but it looked OK so I loaded it up and it works. So that I could easily load it up under Cromemco RDOS, I relocated it to 0x3000 and made a file that you can push straight into RDOS with a terminal program that supports "transfer text to host". That file is here: http://wsudbrink.dyndns.org:8080/kscope_rdos.txt If you want to see the display that Stan Veit says stopped traffic in Manhattan, you can load it up under Richard Cini's Altair emulator with Dazzler support. Bill Sudbrink

15 years

hard drive compatibility

by keithvz＠verizon.net

I have a hard drive that I bought 15 years ago. Western Digital Caviar 2420. 425mb IDE drive. Still works fine in my Amiga. I recently tried to image the drive using DD under linux. While Linux recognizes the model number and capacity, it's unable to read even a single block off the drive. I get "ABRT" errors and "DRDY ERR" errors during a read. I have managed using another method to obtain an image of the drive as I'm sure failure is right around the corner, but I'm still interested in the problem I saw. The ATA-1 standard was passed in the same year as the drive was made, 1994 --- it's possible the drive is "pre-standard." The label on the drive says "AT Compatible Intelligent Drive." Think semi-recent BIOS and new versions of linux should autodetect the drive type ? Modify the (limited) info in BIOS? Use hdparam in linux? Thanks Keith P.S. drive data sheet at http://www.wdc.com/en/products/legacy/Legacy.asp?r=3 WD is awesome for still having this on their site. Although I couldn't check the warranty status w/ the serial number, what the heck!?@# :)

15 years

Trouble with a M7559 TK70 Controller

by robert.jarratt＠ntlworld.com

> -----Original Message----- > From: cctalk-bounces at classiccmp.org [mailto:cctalk- > bounces at classiccmp.org] On Behalf Of Robert Jarratt > Sent: 27 June 2009 16:35 > To: 'General Discussion: On-Topic and Off-Topic Posts' > Subject: Trouble with a M7559 TK70 Controller > > Just as I got my MicroVAX II booting, the TK70 controller has started > to > play up and is no longer working correctly. If I try to boot off the > tape I > get a CTRLERR, and if I boot VMS from the network and then try to mount > a > tape I get "%MOUNT-F-DEVOFFLINE, device is not in configuration or not > available". It was booting from tape just fine a few days ago. I can > see > that the controller has two LEDs on it. When I power it up they both > come on > but then one of them switches off leaving the other one on. The light > that > stays on is the one on the right when viewing the board flat, looking > at the > ribbon cable connector, with the component side up. > > > > I think this means its self test has failed in some way, but I cannot > find a > manual anywhere online to tell me. Can anyone tell me what this might > mean? > > > > Thanks > > > > Rob Never mind. I cleaned the heads and the problem went away. Just a bit surprised that this caused the errors I saw. Regards Rob

15 years

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test-drb June 2009