This is a belated response to a post you made here:
happened upon it while doing a 'for fun' search on the net for anything
doing with good ol' Century Data, my employer when I was young. Couldn't
resist responding to the post, even if it was half a year late!
The exerciser that you have is/was for the Trident series of hard disk
drives (predecessor to the Marksman). I was the main (in fact, pretty much
the ONLY) technician at Century Data/Calcomp, for these exercisers back from
the late 1970's to the mid 1980's, when they were phased out. I retired in
Have fun! (BTW, where'd you find one of these dinosaurs??)
Every so often, a discussion of Tiny BASIC appears around here. I was curious about one of the very first versions of Tiny BASIC, the 8080 implementation done by Whipple and Arnold, as documented in the Vol. 1 No. 1 (Jan 1976) issue of Dr. Dobb's Journal (of Tiny BASIC Calisthenics and Orthodontia)
This issue contains an octal listing of a Tiny BASIC interpreter for the 8080, and I couldn't find this version available for download anywhere. So... I typed it in, and it works!
I documented my work, which is available at
(Note - this location is temporary - I need a home for this if anyone is interested)
Included are the text file for the octal listing, a binary which can be loaded into memory, an attempt to extract the IL from the binary, and some instructions on bringing up Tiny BASIC. I was able to run some simple programs with a Z80 simulator that I've been running, and it appears to work correctly.
I found the PDF of the listing in the ACM digital library:
Typing in octal listings is error-prone enough, and typing them in from bad PDF scans of bad photocopies is even trickier. I have corrected many errors, but I'm sure there are more. If any kind soul would be willing to proofread / correct the listing, it would be **GREATLY** appreciated.
I hope this is of interest to people. I'm very interested in other versions of Tiny BASIC out there, if someone has ever typed this listing before, etc. I'm familiar with Tom Pittman's work, but other resources would be greatly appreciated.
Don't pick lemons.
See all the new 2007 cars at Yahoo! Autos.
Received from a former DEC service rep.:
If anyone wants scans of a specific piece, I will probably arrange it.
This accounts for only the miniscule portion I've managed
to sort and catalog in the past 3 hours (about 1/8 of the total
number of documentation pieces I received):
Communications Options Minireference Manual, vols. 1-7
LSI-11 Systems Service Manual, Vols. 1-3
VAX 8600/8650 System Diagnostics User's Guide
Communications Options Minireference Manual
VAX/VMS Internals and Data Structures
Cartridge Tape Service Documentation
TK50 Tape Drive Subsystem Owner's Manual
TK50 Tape Drive Subsystem User's Guide
TK70 Streaming Tape Drive Owner's Manual
TK70 Streaming Tape Drive Subsystem Service Manual (MicroVAX II sys.)
ThinWire Ethernet COAXIAL CABLE CONNECTOR INSTALLATION CARD
H4000 DIGITAL Ethernet Transceiver Installation Manual
Fiber Optic Attenuator Installation/Configuration Reference Card
LA120 Series Pocket Service Guide
LA10X-EJ/EL Tractor Option Installation Guide
DECWRITER III LA120 Operator Reference Card
LCG01 Color Printer System Pocket Service Guide
MicroVAX 3600/VAXserver 3600/3602 Operation
KA650 CPU System Maintenance
MicroVAX 3600/VAXserver 3600/3602 Technical Information
ULTRIX-32 Guide to the Error Logger System
LJ250/LJ252 Companion Color Printer Pocket Service Guide
LN03 Pocket Service Guide
RF-LN03 Pocket Service Guide
VAX 6200 Options and Maintenance
VAX 6200/6300, VAXserver 6200/6230 Owner's Manual
VAXstation 2000 Workstations and MicroVAX 2000 Network Guide
ULTRIX-32 Basic Installation Guide for the VAXserver 2000
DECstation 2100/3100 Maintenance Guide
MicroVAX 2000 Installation
MicroVAX 2000 Operation Addendum: VAXserver 2000
MicroVAX 2000 Operation
MicroVAX 2000 Troubleshooting
MicroVAX 2000 Technical Information
MicroVAX 2000 Customer Services
VAXstation 2000 and MicroVAX 2000 Maintenance Guide
VAXstation 3100 Maintenance Information
VAXstation 3100 Illustrated Parts Breakdown
VAXstation 2000 Hardware Information
VAXstation 2000 System Guide
VAXstation 2000 Network Guide
VAX 6000-400 Options and Maintenance
VT100 Series Pocket Service Guide
VT180 Series Pocket Service Guide
VT320 Pocket Service Guide
VT330 Pocket Service Guide
VT340 Pocket Service Guide
VAXcluster Service Reference Manual
VAXcluster Service Reference Set
VAX 8530/8550/8700/8800/8820/8830/8840 System Maint. Guide
8800 8700 8550 8500 Console User's Guide
B213F Expander Installation
R215F Expander Maintenance
KA655 CPU System Maintenance
VAX Architecture Reference Manual
CI750 User's Guide
BA11-A Mounting Box and Power System Tech. Manual
VAX-11/750 Diag. System Overview Manual
VAX-11/750 Level 1 Student Workbook (Digital Internal Use Only)
VAX-11/750 UNIBUS Interface Technical Description
VAX-11/751 User's Guide
DELUA User's Guide
MicroVAX 2000 Hardware Information
VAX 8200/50, 8500/50
The Digital Dictionary, Second Edition
VAX Maintenance Handbook (VAX Systems)
VAX Maintenance Handbook (VAX-11/780)
VAX Maintenance Handbook (VAX-11/750)
VAX-11/750 Mini Diag. Ref. Guide
RM05 Disk Subsystem Service Manual
RM05 Disk Subsystem Student Guide (Digital Internal Use Only)
RM03 Disk Drive Maint. Print Set
RP04/05/06 Field Maint. Print Set
Symptom Directed Diagnosis Tool Kit Installation Guide
VAXsimPLUS Field Service Manual
Getting Started with VAXsimPLUS
VAXsimPLUS User Guide
Model 733 DEC Disk Storage Drive Parts Catalog, Jan. 1976
RP04-TC Part II
RP04, RP05, RP06 Field Svc. Handbook
HSC50 Service Manual
HSC Installation Manual
VAX 86XX System Maint. Guide
RP05/RP06 Field Handbook -Company Confidential-
RP05/06 677-01/51 Disc Drive Illustrated Parts Catalog
Model 677-01/51 RP05/06 DEC DISC MAINTENANCE Guide (Educ. Svcs.)
Digital Education and Training: UNIX Utils & Cmds. Student Guide
Date: Fri, 17 Jan 2003 16:27:36 -0500 (EST)
Subject: Looking for : Sharp PC-1405
Or equiv (Tandy had them as PC-2 or something, iirc).
The goal of my classic collection is to get one of every computer I've
programmed over the years. One of the first computers I programmed was a
PC-1405 (actually, I can't remember the exact model).
I found one of these in a pawn shop. By brother "stole" it. I found
another. This was my one classic computer that was helluva useful. So
useful I took it with my places. And, well, I've just lost it. I've
checked eBay and there are a few Sharp Pocket Computers, but W@W L@@K @
T3H PR1C3Z! Buy it now for "only" 300 USD!
So, does anyone here have one they don't need and/or would be willing to
let go for a reasonable price?
I've got a PC-1421 Financial Computer if you (or anybody) are interested:
76 character keyboard
16 character display
40K ROM Basic
4.2 Kb RAM
Interface for optional CE-126 Printer/Cassette (don't have)
Basic program mode
Basic run mode
Almost new, in box with cover & 280P manual. Make me an offer (less than
US$ 300, or even CDN$ 300 :).
The 8/L, ASR33, DF32 disk emulator project has been sold. Thanks
for all your interest (and offers). Anyone who wants the DF32
emulator schematic and artwork, I can email you a copy. I hope
someone can take my "first draft" and make a useful unit for those
who are interested.
I have a working ADM-3A that I may want to sell also. It has a
homebrewed lower-case 2716 ROM (thanks Steve Loboyko for the font
files). I installed the "optional" parts for current loop on the
main PCB, and used it with the 8/L. The only thing that's missing
is the little aluminum panel covering the dip switches.
Any interest? Same deal as before, please email offers, "sealed
I have an Atari 800xl and a couple of 1050 disk drives. I also have
two copies of the M.U.L.E. game on disk. Unfortunately, I can't get
either to boot on the 800xl. I suspect that these are older games that
were written for the 400/800 and may need the "translator disk" that
allowed the 800xl to run games written for the older machines. Does
anyone know where I could obtain a copy of this translator disk?
I have a fine old Stag PPZ modular EPROM programmer:
It takes plug-in EPROM (model Zm2000) and PAL (Zm2200) modules, called
Z-modules by Stag. I've recently acquired a new module, Zm3000, which
looks like a more recent EPROM module. The chips in the Zm3000 are
date coded in 1993, whereas the Zm2000 is nearer 1988. The PPZ main
unit contains a 6809 CPU and a small CRT display.
Does anyone know anything about this system? What about other Z-module
types? In particular, should the Zm3000 work with the PPZ, because I
currently get an error message "Incorrect Mainframe"?
Thanks in advance for any clues! (Virtually all I get from Google is a
link back to my own web page!)
Anyone here have the speech module for an IBM PC Convertible
they want to get rid of?
I just got one of these laptops & was hoping to score one.
David M. Vohs
Digital Archaeologist & Computer Historian
"Triumph": Commodore 64, 1802, 1541, Indus GT, FDD-1, GeoRAM 512, MPS-801.
"Leela": Original Apple Macintosh, Imagewriter II.
"Delorean": TI-99/4A, TI Speech Synthesizer.
"Spectrum": Tandy Color Computer III.
"Monolith": Apple Macintosh Portable.
"Boombox": Sharp PC-7000.
"Butterfly": Tandy 200, PDD-2.
"Shapeshifter": Epson QX-10, Comrex HDD, Titan graphics/MS-DOS board.
"Scout": Otrona Attache.
(prospective) "Pioneer": Apple LISA II.
"TMA-1": Atari Portfolio, Memory Expander +
"Centaur": Commodore Amiga 2000.
"Neon": Zenith Minisport.
> From: "Chuck Guzis" <cclist at sydex.com>
> Not all Northstar diskettes are HS. One of the models (Advantage?)
> isn't--and it's that format that the Microsolutions MatchPoint will
> read, not the others. It's been too long since I've seen the darned
I think the machine you are thinking of might be the N* Dimension. The Advantage
still uses 10-sector floppies.
I've never seen the Dimension but vintagemicros on Ebay was selling one a while
back and had a picture of it. Apparently it was MS-DOS compatible.