On Wed, 2021-12-15 at 12:00 -0600, cctalk-request at classiccmp.org wrote:
> Not sure who needs to know.
> Perhaps they are useful for emulation crash analysis, or for
> educational
> purposes.
> You also see the highly optimizing BLISS32 compiler at work.
First thing that popped into my mind was "fix the huge DCL security
hole finally for VAX." I don't think it has been done yet. Be a lot of
reading after OCR though, too bad it wasn't text files. Also I have no
clue how to program BLISS32 or even MACRO-32, so mostly a pipe dream.
Hi all,
the german Engeneer Tillman Reh has build an Zilog Z280 SBC card with
Eurocard Bus connector:
http://oldcomputers.dyndns.org/public/pub/rechner/zilog/z280/index.html
The Software is open and Tillman allows the PCB to be reproduced from
his original Gerber files on request.
Unfortunately some parts for those cards are almost unobtanium in the
meantime, the Zigzag DRAMs, the COM8117 Uart, the LT1134 Driver chip
and also the SMC FD37C65CLJP FDC are difficult to source.
I have two such cards and I got all the necessary parts, but I have
friends that are also interested in such a card to run CP/M 3 or UZI280
on that Z280 (The Z800!) 16 Bit CPU.
There are many other FDCs that should be compatible, the WD37C65 for
example. This was used in many PC related Floppy controllers..but they
are in fact not compatible. The use of the SMC37C65CLJ P seems to be
necesary for this board, for reasons that are unclear.
While copying data to the disc there happens a timeout on the earlier
FDC varaints, I have read somewhere that reading the status register
gives unexpected results, they have tried to fix this already in the
90ies by inserting some delays, w/o success.
Has someone here Errata Sheets for those SMC FD37C65B (not working) and
FDC37C65C (working) variants of that FDC Chip, so that one can see what
they may have changed between the releases?
Here are some part of the BIOS:
; I/O-Page mu~ bereits auf BOARDP gesetzt sein. Ver{ndert ABHL.
FdcCom::
if loader
ld hl,CList
else
ld hl,(CmdAdr) ; Zeiger auf Befehlsliste
endif
FdcCo1::in a,(FdcSta) ; (Einsprung mit Zeiger in HL)
rla
jr nc,FdcCo1 ; warten bis FDC-RQM (Request for Master)
rla
jr c,FdcErr ; bei falscher Datenrichtung: DIO-Error
nop
nop
nop
ld a,(hl)
out (FdcDat),a ; Befehls/Datenbyte an FDC ausgeben
inc hl ; Zeiger auf naechstes Byte
djnz FdcCo1 ; alle Befehlsbytes ausgeben
ret
; DIO-Error (Datenrichtungsfehler im FDC) : Stoppen des Systems
;*** evtl. Fehler korrigieren und weiterarbeiten?
; (Ist Fehler ueberhaupt korrigierbar?)
FdcErr: ld hl,DioMsg
call PMsg ; "DIO-Error" ausgeben
di
halt ; sicherheitshalber nicht weiter arbeiten
It seems that the FDC Status register requests a data transfer in the
wrong direction on the B-Release Chips... It is this "DIO-Error" that
happens after a few write operations, but formating the disk is possible.
Kind Regards,
Holm
--
Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe,
Goethestrasse 15, 09569 Oederan, USt-Id: DE253710583
info at tsht.de Fax +49 37292 709779 Tel +49 37292 709778 Mobil: 0172 8790 741
I will be in Switzerland/Germany near Davos Feb 5-15 and I was curious what
kinds of museums and sights were worth planning to see during this time of
the year in that area? Is there an orchestra concert show season there?
Any recommendations for resources for travelers that are not overly
commercial, in English, would be appreciated.
On the inside of an old painting of my great great great grandfather from
around 1830 was a piece of paper with a note written by his granddaughter
many years later about someone called "Count von Burlowe" (spelling?) about
a partnership to found or make commercial a health resort called "Bad
Krautzma", but I believe she was way off spelling-wise. It's written in
19th century US cursive, hard to read. So I am interested in learning a
bit about my heritage too.
Thanks
BIll Degnan
Landenberg, PA USA
Are you still in need of any HP1000 RTE equipment? I have a lot of boards, chassis?, tape drives, etc. If not and if you know of someone who would be interested in this equipment please let me know?Kind Regards?Joe
Sent from my iPhone
Since they're vintage...
A friend is selling two HP 3000/928LX computers. I don't know what he
wants for them. For people interested in the HP 3000, this would be a nice
buy.
Size-wise, they're between a PC and a 2-drawer file cabinet in size.
They'll be network capable (may require a transceiver, but likely comes
with, and they're generally about $10 otherwise).
The following describes one, but there are two...
----
1. HPe3000 928LX.
2. 128mb main memory.
3. (2) 4gb internal disk drives.
4. DDS-2 internal tape drive.(two in one system and one in the other)
5. MPE/iX 7.5 Operating System with 8 user license.
6. System Consoles with keyboards.
7. SE SCSI Interface Card
8. External Disk drive mini cabinet with SCSI drives
Bonus: Backup and systems DDS tapes, Manuals, extra 4gb SCSI disks, and
Misc. Documentation
Lots of software.
Both systems were operating when shut down recently. Buy as is with no
guarantee..
Make an offer. Buyer to arrange packing and shipping.
Location: At my home office in Carrollton, TX
Contact Paul Edwards, pedwards at gte.net
I have two power supplies that I no longer need.
1. Power One model SPM5A2M6G1K: 115 VAC 30 A or 230 VAC 15 A 50-60 Hz
input, outputs 48 V 5 A, 5 V 10 A, 2 x 12 V 10 A, 5 V 150 A.
? ? 13" x 5" x 8 ", 17 lb
2. Lambda LM 124 FM lab supply: 115 VAC 50-60 Hz input, outputs 0-40 V,
0-1.5 A
? ? 17" x 4" x 5", 13 lb
Yours if you send me a PDF of a shipping label. I can send photos (but
they're too big to fit in classiccmp.org mailings).
Local pickup OK.
Van Snyder
La Crescenta, CA
Hi all,
where do you guys go for assembly of your boards, when you replace old
stuff?
Not too many places like THT anymore, and getting ridiculously expensive
lately.
Any recommendations?
I'll be following your progress with interest, I just installed Coax into the walls of my computer playhouse so I can ARCNet with my S-100 system. I have an ARCNet packet sniffer that can be loaned out if you would find it helpful.
- Jonathan
On Sunday, December 12, 2021, 11:00:03 AM MST, <cctalk-request at classiccmp.org> wrote:
Send cctalk mailing list submissions to
??? cctalk at classiccmp.org
To subscribe or unsubscribe via the World Wide Web, visit
??? http://www.classiccmp.org/mailman/listinfo/cctalk
or, via email, send a message with subject or body 'help' to
??? cctalk-request at classiccmp.org
You can reach the person managing the list at
??? cctalk-owner at classiccmp.org
When replying, please edit your Subject line so it is more specific
than "Re: Contents of cctalk digest..."
Today's Topics:
? 1. Cheap PDP-8 boards on eBait (Noel Chiappa)
? 2. ISO: DEC PDP-8 Data Multiplexer (DM01, etc.) (Josh Dersch)
? 3. Re: Cheap PDP-8 boards on eBait (Ethan Dicks)
? 4. Wanted: IBM PC compatible 8 or 16 bit Arcnet cards
? ? ? (Michael Brutman)
? 5. Re: Wanted: IBM PC compatible 8 or 16 bit Arcnet cards (ED SHARPE)
? 6. Re: Wanted: IBM PC compatible 8 or 16 bit Arcnet cards
? ? ? (devin davison)
----------------------------------------------------------------------
Message: 1
Date: Sat, 11 Dec 2021 13:21:25 -0500 (EST)
From: jnc at mercury.lcs.mit.edu (Noel Chiappa)
To: cctalk at classiccmp.org
Cc: jnc at mercury.lcs.mit.edu
Subject: Cheap PDP-8 boards on eBait
Message-ID: <20211211182125.6B73B18C077 at mercury.lcs.mit.edu>
This guy:
? https://www.ebay.com/sch/m.html?_ssn=jariadkin-0&_sop=10
has a couple of PDP-8 boards for sale that at the moment are going _really_ cheap.
? ? Noel
------------------------------
Message: 2
Date: Sat, 11 Dec 2021 10:30:43 -0800
From: Josh Dersch <derschjo at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
??? <cctalk at classiccmp.org>
Subject: ISO: DEC PDP-8 Data Multiplexer (DM01, etc.)
Message-ID:
??? <CADBZjLaOMYSonVTW+3_=_VFyMHsGwvPuJ_dbUW7rZ3XULBiEMQ at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Hey all --
Got the TC01 working the other night, after a couple weeks of debugging
(*).? I'd like to be able to have both it and the RF08 that I'm working on
connected to the 8/I and running at the same time, so I'm looking for a
DM01 Data Multiplexer.? If anyone has any leads, do let me know.
Thanks as always,
- Josh
(*) Total TC01 fault count (so far):
- Bad transistor in TU55 motor brake control (W040)
- Bad jumper solder joints in TU55 (W990)
- Timing of UTS and U+M one-shots (R303) way out of adjustment (U+M
one-shot was at 2 seconds or so...)
- Bad tape data relay (G851)
- Bad IOT decoder transistor (W103)
- Missing Diode (W113) and weak diode in Write enable selection logic
- Timing of write clock way, way out of adjustment (90Khz vs. 125Khz
expected.)
- 24 dead maintenance panel bulbs
- 2 dead TU55 bulbs (yet to be replaced)
------------------------------
Message: 3
Date: Sat, 11 Dec 2021 16:31:45 -0500
From: Ethan Dicks <ethan.dicks at gmail.com>
To: Noel Chiappa <jnc at mercury.lcs.mit.edu>,? "General Discussion:
??? On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
Subject: Re: Cheap PDP-8 boards on eBait
Message-ID:
??? <CAALmimkQcWu67RQZknQuy11akoCPOihoDtAeOOPuQX9vzHjitw at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
On Sat, Dec 11, 2021 at 1:21 PM Noel Chiappa via cctalk
<cctalk at classiccmp.org> wrote:
> This guy:
>
>? https://www.ebay.com/sch/m.html?_ssn=jariadkin-0&_sop=10
>
> has a couple of PDP-8 boards for sale that at the moment are going _really_ cheap.
Tap handles and DEC boards?? Odd mix.
I took a risk and bid.? I have an -8/e and -8/m to fix.
Thanks!
-ethan
------------------------------
Message: 4
Date: Sat, 11 Dec 2021 20:00:57 -0800
From: Michael Brutman <mbbrutman at brutman.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
??? <cctalk at classiccmp.org>
Subject: Wanted: IBM PC compatible 8 or 16 bit Arcnet cards
Message-ID:
??? <CA+bZ4SBQWkvsqM79EUc8QNmEZFKjgEyvp5x69_y5=vs8rAt5Fg at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
I'm using debug logs to try to debug flow control issues when using mTCP
and a packet driver that presents itself as Ethernet but actually uses
ARCNET.? I've gotten to the point where I just want to have an Arcnet in
the house.? Especially since I might just modify mTCP to work with Arcnet
packet drivers and cards directly.
Before I get too serious with eBay, does anybody want to rehome some Arcnet
hardware?
-Mike
------------------------------
Message: 5
Date: Sun, 12 Dec 2021 04:19:06 +0000 (UTC)
From: ED SHARPE <couryhouse at aol.com>
To: cctalk at classiccmp.org, cctalk at classiccmp.org
Subject: Re: Wanted: IBM PC compatible 8 or 16 bit Arcnet cards
Message-ID: <1961633108.407863.1639282746182 at mail.yahoo.com>
Content-Type: text/plain; charset=UTF-8
I remember? you? could? get? arcnet? ?for? HP? 150? also? ?Ed#?
In a message dated 12/11/2021 9:01:15 PM US Mountain Standard Time, cctalk at classiccmp.org writes:?
I'm using debug logs to try to debug flow control issues when using mTCPand a packet driver that presents itself as Ethernet but actually usesARCNET.? I've gotten to the point where I just want to have an Arcnet inthe house.? Especially since I might just modify mTCP to work with Arcnetpacket drivers and cards directly.?Before I get too serious with eBay, does anybody want to rehome some Arcnethardware???-Mike
------------------------------
Message: 6
Date: Sun, 12 Dec 2021 05:05:28 -0500
From: devin davison <lyokoboy0 at gmail.com>
To: Michael Brutman <mbbrutman at brutman.com>,? "General Discussion:
??? On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
Subject: Re: Wanted: IBM PC compatible 8 or 16 bit Arcnet cards
Message-ID:
??? <CAOpB=UMtSmRP8udanC31qUArs8V=djHg5bF9yWF-ZuvAW=yC1Q at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Greetings,
I had quite a few arcnet cards laying around a while back, I had picked up
a ton of them from the back storage of a datacenter that was clearing out
surplus equipment. I am uncertain of how many I still have in storage. How
many do you need?
If you are able to wait a couple days, I can check how many I have
remaining in storage, and I can ship them to you once found.
--Devin D.
On Sat, Dec 11, 2021 at 11:01 PM Michael Brutman via cctalk <
cctalk at classiccmp.org> wrote:
> I'm using debug logs to try to debug flow control issues when using mTCP
> and a packet driver that presents itself as Ethernet but actually uses
> ARCNET.? I've gotten to the point where I just want to have an Arcnet in
> the house.? Especially since I might just modify mTCP to work with Arcnet
> packet drivers and cards directly.
>
> Before I get too serious with eBay, does anybody want to rehome some Arcnet
> hardware?
>
>
> -Mike
>
End of cctalk Digest, Vol 87, Issue 12
**************************************
