test-drb May 2005

test-drb@ccmp.vtda.org

248 participants
723 discussions

PC/Apple/etc. Cards Worth Keeping/Storing (Tony Duell)

by mbbrutman＠magnaspeed.net

I'm a little late on this thread .. it's hard to keep up. Besides the Tech Ref manuals and the Hardware maintenance manuals, the Sams ComputerFacts have also been helpful. I'm a big PCjr fanatic, but I find the hardware literature from the PC, XT and AT to be helpful because it is all very closely related. Besides keeping the old classic cards, I look for (and hold) good general purpose cards. Future Domain 85x series SCSI cards are a good example; they work in eight bit systems like the PC and the software is functional enough to drive hard disks, CD-ROMs, etc. While we're on the topic, I've been trying to find an XT tech ref. I want it for the BIOS listing of the hard drive adapter. This kind of thing is useful when grafting one of the old MFM controllers onto a PCjr. Does anybody have a source for these? (I have the Jr tech ref and an AT tech ref, but finding an XT tech ref has been difficult.) Mike mbbrutman at brutman.com

19 years

AIM 65 lives

by andyda＠earthlink.net

Just a note of thanks for help and encouragement. I finally got my AIM back running again with the help of a local who had some test equipment. First, before getting the help I found several stuck address lines and cleared them by blowing an brushing and vacuuming. We then found that 5 out of 8 2114 RAMs were bad, and the CPU just didn't have enough oomph. After cleaning the board and replacing parts, it works like a charm. Seems weird that the CPU and RAM went bad just sitting, and the board got something stuck in the address lines just sitting in the box for 20 years, It was the original shipping box for the AIM, but I guess more crud got in the box than I realized. Lessons learned anyway. Now the first thing I need to do is to get the 20 mil current loop to RS-252 working so I can use my Mac as a terminal and program development and storage. AndyD

19 years

Nova?

by pcw＠mesanet.com

I wonder if these are the Rolm Nova clone. They look old enough to be... http://cgi.govliquidation.com/auction/view?id=579804&convertTo=USD <http://cgi.govliquidation.com/auction/view?id=579804&convertTo=USD> Peter Wallace

19 years

Some rack mount paper tape readers and some drums...

by pcw＠mesanet.com

http://cgi.govliquidation.com/auction/view?id=584873&convertTo=USD <http://cgi.govliquidation.com/auction/view?id=584873&convertTo=USD> Peter Wallace

19 years

Paper Tape Emulator in Basic

by jim.beacon＠ntlworld.com

Hi, has anyone tried to write a paper tape emulator in BASIC? I've had a go in GW-BASIC, but I suspect that the implementation of the language is too slow to reliable drive the serial port - it doesn't always pick up the paper advance signal (I've tried using both CTS and DCD as inputs). Will I have to go to a machine code routine to get the fast port access? I look forward to replies. Jim. Please see our website the " Vintage Communication Pages" at WWW.G1JBG.CO.UK

19 years

DEC Tx07 tape drive question (was Re: new scrap dealer found :>)

by abacos_98＠yahoo.com

I had an 880 with the SCSi interface. It was a big Pertec to SCSI adapter that bolted right to the back of the drive. Wish I still had that adapter. I haven't seen one since. Brian. --- Tim Riker <Tim at rikers.org> wrote: > Jay West wrote: > > I'm quite positive they were SCSI 1/2 mag tape > drives. However, some > > googling on the web seems to indicate that a TZ07 > is a 4mm dat? No, what > > I saw was clearly 1/2 mag tape, front loader, > horizontal drive. Reminded > > me of an M4 9914 or Cipher F880 or was it F990... > > F880 is shorter. M990 (not F) is the tallest. Then > came the M995S. > Simple googled page: > > http://www.electrovalueinc.com/9_track_drives.htm > > The M990 had a scsi option, but was pertec by > default. The F880 likely > had a scsi option as well. > > My M990 does not have the scsi interface, but I sure > wish it did. =( > >

19 years

Help: simulated OS/8 gen

by GOOI＠oce.nl

Hi Dennis, this looks familiar to me :~) strugled with that too. With the help of Vince I got it OK (so far). Check www.pdp-11.nl and click the link "Homebrew PDP-8" at the left side, maybe it can be of help to you. - Henk, PA8PDP. -----Original Message----- From: cctalk-bounces at classiccmp.org To: cctech at classiccmp.org Sent: 1-5-2005 2:57 Subject: Help: simulated OS/8 gen Dear all, I'm trying to construct an OS/8 environment under SIMH. I'm trying to use an RK05 device for the SYS volume, but can't seem to get the BUILD procedure right. The OS/8 distribution I grabbed is dectape images of V3D from http://www.pdp8.net/images/images/misc_dectapes.shtml. Here's what I've done so far: sim> at dt0 Dectapes/AL-4711C-BA.tu56 DT0: 12b format, buffering file in memory sim> at dt1 Dectapes/AL-4712C-BA.tu56 DT1: 12b format, buffering file in memory sim> at rk0 sys.dsk sim> at rk1 user.dsk sim> b dt0 .R BUILD $ At this point, I can't seem to INSERT or SYS anything resembling an RK05 system disk. If I: $LOAD DTA1:RK08SY then I can: $SYS RK8:RKA0 but when I try to do BOOTSTRAP I get: $BO ?SYS $ I also fiddled with PIP and the /Y and /S flags, trying to just build a copy of the tape on the disk, to no avail. I'm sure I'm just a dunderhead. Can anyone provide some hints? Thanks, De

19 years

Original IBM 64K Memory Kit in original box on ebay....

by RMeenaks＠OLF.COM

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=74946&item=5190497915 &rd=1&ssPageName=WDVW Ram (c) 2005 OpenLink Financial Copyright in this message and any attachments remains with us. It is confidential and may be legally privileged. If this message is not intended for you it must not be read, copied or used by you or disclosed to anyone else. Please advise the sender immediately if you have received this message in error. Although this message and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by Open Link Financial, Inc. for any loss or damage in any way arising from its use.

19 years

Vintage Computer Web Site

by marvin＠rain.org

I just ran across this site: http://www.1000bit.net/ It has some good information *and* photos of quite a few machines. The concept seems to be that people register and make public information about their machines. I had listed a bubble memory module (FBM43CA) on VCM with no knowledge of what it went to. The information on Norm's website at http://gallery.owt.com/~anheier/index.src told me that it goes to Fujitsu's first micro, an M-8. I *think* we have a nice find there!

19 years

DEC Tx07 tape drive question (was Re: new scrap dealer found :>)

by abacos_98＠yahoo.com

Jay, I have a TSZ07 right next to my desk and it surely is a 1/2" front loader. It will due either 6250 or 1600 BPI. Brian. --- Jay West <jwest at classiccmp.org> wrote: > I'm curious about the "TZ07" tape drives I located. > > I'm quite positive they were SCSI 1/2 mag tape > drives. However, some > googling on the web seems to indicate that a TZ07 is > a 4mm dat? No, what I > saw was clearly 1/2 mag tape, front loader, > horizontal drive. Reminded me of > an M4 9914 or Cipher F880 or was it F990... > > Anyways... I could be wrong about the TZ07 > designation, but I was pretty > sure I remembered it right. Can anyone tell me if a > TZ07 is in fact a 1/2 > front loading mag tape drive, and was it typically a > given set of densities > or was it frequently only one or two densities? > > Jay > > >

19 years

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test-drb May 2005