The Mike Patterson scans

Hi Everyone
With the help of his daughter Sue, I acquired a ton of Apple gear via the estate of Mike Patterson.  He was an Apple software developer in the mid 90s and enthusiast throughout his computing life.  He also kept everything, including print-outs of Apple Developer Connection articles through to event invitations for the launch of the iMac in schooling.  I have scanned everything printed and as of tonight, finished the renaming, OCR and upload. 
Usually I move files into their relevant folders but for now all the scans sit under his name on my Google Drive.  
People on this group may enjoy scrolling through the Microsoft Communique magazines, read about the technical details behind Nubus or simply checkout a Canberra Linux group newsletter.  

Enjoy via Scanned Book and Magazine Collection -> Mike Patterson

Jeremys-MBP:Mike Patterson Scans Jeremy$ ls -R 
Adobe Photoshop 5.5 Web Design Michael Baumgardt.pdf
Apple 1999 Event Invite postcard
Apple Nubus Techinical Note.pdf
Apple University Consortium Letter 1999-07 Scholarship WWDC.jpg
AppleShare IP 6 Technical Publications AppleShare Client.pdf
AppleShare IP AppleTalk Filing Protocol Technical Publication.pdf
Approved Systems ACT Brochure.pdf
Australian MacUser 1997-03.pdf
Australian MacWorld Special Edition Buyers Guide.pdf
Australian Macworld 1996 Buyers' Guide.pdf
Australian Macworld 1996-06.pdf
Australian Macworld 1996-09.pdf
Australian Macworld 1996-10.pdf
Australian Macworld 1997-01 02.pdf
Australian Macworld 1997-03.pdf
Australian Macworld 1997-04.pdf
Australian Macworld 1997-06.pdf
Australian Macworld 1997-08.pdf
Australian Macworld1997-08 .pdf
Auto Mac II Macro Recorder maual.pdf
Bio Scene 88 Vol 17 No 6.pdf
Bio Search 88 Vol 6 No 4.pdf
Casady and Greene Acess Manage Environment manual.pdf
Claris Australia Soft Talk magazine 1997-08.pdf
Communique 1996-06 Volume 70.pdf
Communique 1996-08.pdf
Communique 1996-09 Issue 73.pdf
Communique 1997-02 Issue 77.pdf
Communique 1997-03 Issue 78.pdf
Communique 1997-04.pdf
Communique 1997-05.pdf
Communique 1997-07.pdf
Communique 1997-08.pdf
Communique Issue 81.pdf
Control Data
Corel Draw 8 for PPC Macintosh brochure.pdf
Corel Photopaint 8 for PPC Macintosh.pdf
Epson Stylus Color 740 Printer.pdf
FileMaker Asia Pacific Newsletter 2002-02.pdf
Final Cut Pro Field Dominance Discussion AppleCare Tech Info Library.pdf
Gateway 2000 Australian Brochures.pdf
Innovation by Design Apple Develope Conference 1990 stationary.jpg
Introducing Mac OS 8 brochure.pdf
Kids Communique (Microsoft publication)
MacTech 1996-01.pdf
MacTech 1997-05.pdf
MacTech 1997-07 Vol 13 No 7.pdf
MacTech 1997-07.pdf
MacTech 1997-08 Vol 13 No 8.pdf
MacTech 1997-08 Vol 13 No 9.pdf
MacTech 1997-10.pdf
Macintosh Inside Out Program with MacApp.pdf
Macintosh Quadra Video Architecture AppleLink AUST0133.pdf
Michael Paterson Interactive Multimedia OPH.pdf
Microsoft Communique member letter.pdf
Microsoft Tips & Techniques for Macintosh 1995-12 1996-01.pdf
Microsoft Tips & Techniques for Macintosh 1996-02 03.pdf
Microsoft Tips & Techniques for Macintosh 1996-04 05.pdf
Microsoft Tips & Techniques for Macintosh 1996-06 07.pdf
Microsoft Tips & Techniques for Macintosh 1996-08 09.pdf.pdf
Microsoft Tips & Techniques for Macintosh 1997-06 07.pdf
Microsoft Tips & Techniques for Windows 1995-10.pdf
Microsoft Tips & Techniques for Windows 1996-04 05.pdf
Microsoft Tips & Techniques for Windows 1997-06 07.pdf
Mike Paterson Approved Systems.pdf
Motorola MC68000 Family Reference.pdf
Motorola MC68020 32-bit Microprocessor Users Manual 4th ed.pdf
Motorola MC68851 Pages Memory management unit 2nd ed.pdf
Motorola MC68881 882 Floating Point Coprocessor Users Manual.pdf
Newton Article exerpt Australian MacWorld 1997-93.pdf
Newton MessagePad 2000 and eMate First Look Aus Macworld 1997-01 JBH.jpg
Newton MessagePad 2000 article Aus Macworld 1997-08 JBH.jpg
Object oriented Software construction ISBN 0136290493.pdf
PASCAL User manual and report 2nd ed by Kathleen Jensen.pdf
PLI Infinity Turbo 40.pdf
PLI Turbo Back Disk Drive Backup manual.pdf
PLI Turbo Cache.pdf
PLI Turbo Optimizer manual.pdf
PLI Turbo Spool.pdf
Photoshop Web Magic PART.pdf
Photoshop Web Magic Volume 1.pdf
Photoshop Web Magic Volume 2.pdf
Press Release Apple and Symantec cross platform software development AppleLink AUST0133.pdf
Printed articles from Mike (Apple Devloper Connection and forum)
Publish Australia 1997-03 04.pdf
Publish Australia 1997-04 05.pdf
Publish Australia 1997-07 to 08.pdf
QMS Magicolor 2 CX Print Sample.jpg
REALbasic Version 2 brochure.pdf
SCSI Corporation (Australia)
The C++ Programming Language 2nd Ed Bjarne Stroustrup.pdf
Using Displacement maps to simulate reflections Apple Creative Master Class by John Paul Caponigro.pdf
Word Finder Electronic Thesaurus for Macintosh Manual.pdf
Yamaha Australia CRW4416 CD burner brochure 1999.pdf
iMac Event Invitation for School Janis Norton-Baker.jpg

./Apple 1999 Event Invite postcard:
2021-05-16-17-49-45.jpg	2021-05-16-17-49-46.jpg

./Control Data:
Communicating with Microcomputers and Workstations datasheet.pdf
Control Data CDC Net Conceptual Overview.pdf
Control Data Connect for Macintosh Quick Reference - NOS VE Workstation Software.pdf
Control Data Connect for Macintosh Version 2.1.pdf
Control Data Cyber 180 Architecture.pdf
Control Data RAW
Desktop VE for Macinotsh.pdf
Jeremy Barr-Hyde Retouch cover Control Data Cyber 180 Architecture-1.jpg
NOS VE Technical Summary.pdf
Squirt Systems Quick Information Reference Tables 1989-12.pdf

./Control Data/Control Data RAW:
20210512191300000.jpg	20210512191308001.jpg	20210512191337000.jpg
20210512191300001.jpg	20210512191330000.jpg	20210512191337001.jpg
20210512191308000.jpg	20210512191330001.jpg

./Kids Communique (Microsoft publication):
Kids Communique 1200dpi Sattva Descreen JBH edit.pdf

./Printed articles from Mike (Apple Devloper Connection and forum):
 AppleCare Tech Info Library -Disk First Aid Frequently Asked Questions (1 of 2).pdf
 AppleCare Tech Info Library -Disk First Aid Frequently Asked Questions (2 of 2).pdf
 AppleCare Tech Info Library -Mac OS About Mac OS Extended Format 7:12:99.pdf
 QTMCC15 - Decompressing MP3.pdf
ADC Boot  ROM  Contents.pdf
ADC NewWorld  Boot  Process.pdf
An Introduction to QuickTime for Java  Previous  Section  Table  of Contents  Next  Section  Module  Contents  1- Initializing  Quicktime  and  Displaying  an Image.pdf
An Introduction to QuickTime for Java - Module  Contents  5- Custom  Media  Controllers  in QTJ.pdf
An Introduction to QuickTime for Java - Module 2- Playing a Movie.pdf
An Introduction to QuickTime for Java - Module 4- Playing sounds.pdf
Apple Hard Disk-  Driver Matrix.pdf
AppleCare Tech Info Library -Mac OS Extended Format Volume and File Limits.pdf
AppleCare Tech Info Library -Macintosh File System Specifications & Terms 7:12:99.pdf
Appletalk  seed  routing.pdf
Ask Tog GUI Design Principles 1998-11.pdf
AskTog A Quiz designed to give you fitts 1999-02.pdf
AskTog OS X First Look 2000-02.pdf
DVD Discs- Cannot See on Desktop and:or No Sound.pdf
Developer Technote 1176 Mac OS 9 By John Montbriand.pdf
FL 15 - Blessed  Folder  - A How-To  Guide 1986.pdf
Hard Disk Driver- Identifying It And Ensuring Compatibility.pdf
Intro to QuickTime  for Java  - Module  3 Working with Text Apple  - Developer.pdf
Mac OS X Server- Changing Name Assigned to NetBoot Clients.pdf
Mac OS X Server- Inside NetBooting.pdf
Mac OS X Server- NetBoot Installation and Setup.pdf
Mac OS X Server- NetBoot Theory Of Operation.pdf
Mac OS X Server- Selecting a Default AppleTalk Zone Without Routing  of AppleTalk Article  ID-60223.pdf
Mac OS X Server- Using As An AppleTalk Seed Router.pdf
Mac OS- About Mac OS Extended Format.pdf
Macintosh- How  Often Should I Defragment My Hard Drive?.pdf
Macintosh- How to Reset PRAM and NVRAM 1987.pdf
Metasearching or Megasearching Toward a Data Model for Distributed Resource Discovery.pdf
Power Macintosh  Modes  Supported  6100 DOS  Compatible-  Video Modes.pdf
QTMCC  17  - Track  Editing.pdf
QTMCC16 - Importing Sys 7 Snds.pdf
Serial Printers- Choice of Serial Ports.pdf
Share DOS  Computers  Volume  Between Power  Macintosh DOS.pdf
Startup Sequence  in  the  NewWorld  Architecture.pdf
TECHNOTE Fundamentals of Open Firmware, Part I The User Interface.pdf
TECHNOTE Fundamentals of Open Firmware, Part II The Device Tree.pdf
TECHNOTE Understandin PCI Expansion ROM Choices for Copland by Wayne Flansburg.pdf
TN  1167- The  Mac  ROM  Enters  a New  World.pdf
TN 1184 FCBs Now and Forever 21:12:99.pdf
TN 1187 Digital CD Audio 1999-12-21.pdf
Tech Echange AppleTalk  Seed  Router.pdf
Tech Exchange Solution Netbooting.pdf
Tech Exchange When  will  the  spanning  CST  tree  bug  be  fixed.pdf
Tech Exchange re Mac OSX Server 1.2.pdf
Technote  1061  - Open  Firmware-  The  User  Interface.pdf
Technote  1062  - Open  Firmware,  Part Il- The  Device  Tree.pdf
Troubleshooting Hard Drives- Reformatting.pdf
Troubleshooting a CD-ROM or DVD-ROM Disc.pdf
incomplete  Mac OS X Server Apple File Services  appletalk  zone  list.pdf
intro to QuickTime  for Java - Setting Up and Building.pdf

./SCSI Corporation (Australia):
SCSI Corporation CD ROM and Optical News.pdf
SCSI Corporation Reseller Price List 1993-08.pdf

Bernard Ryan Informix Systems Consultant.pdf
Bundle of documents for Informix.pdf
USR INFORMIX Newsletter 01 nd.pdf
USR INFORMIX Newsletter 02 nd.pdf
USR INFORMIX Newsletter 03 nd.pdf

Apple Bandi Pippin article

Pippin – prime time player by Jon Zilber Australian Macuser 1996-04

Aim of sharing this extracted article is to give more references online when one may search for interesting Australian Pippin facts.

If you’d like the PDF, simply download it from the Google Drive, search Pippin:

State of the Art: Laserdisc and the IBM PC

Anyone that knows me will remember my interest in Laserdisc, especially when linked to a PC. This very early PC World article shows a time when even the definitions of the techology and it’s applications were evolving.

Presented below are painstaking scans from PC WORLD 1984-10 and nice PDF available as always on Google Drive: Scanned Book and Magazine Collection -> Laserdisc (folder). Or browse low res images below:

Teleray CRT Data Terminal; Service manuals and schematics

A recent donation brought alone these rare, late 1970s service manuals and schematics. Difficult to scan but we got there. Teleray 3500 and Teleray 3500 C1 are covered. I am sharing these as there is a lot of narritive that explain to you a fascinating chain of electronics that go into making a terminal work. Highly educational and worth of a scroll through by anyone.

Scanned Book and Magazine Collection -> Service Manuals and Repair Books (CRT monitors, data terminals)


This service manual provides complete servicing and adjustment information for the TELERAY 3500 series CRT Data Terminals. It is assumed that the reader has both a general background in electronics and a knowledge of digital communications and circuitry.

Please read this manual before attempting to service a TELERAY. Note that appropriate test equipment is required for some adjustments.

WARNING: High voltages injurious to health are present inside the TELERAY, particularly in the vicinity of the CRT monitor. Use extreme caution when working on the unit.

CAUTION: Certain of the integrated circuits used in the TELERAY are MOS ICs; although they are input-protected, use standard MOS handling procedures when working on the circuitry, particularly the 2513 Character Generator ROM.


The TELERAY 3500 series CRT Data Terminals are communications-oriented units providing transmission and reception of character-oriented data. Data is entered: either from

the keyboard at the front of the terminal or from a standard data interface, and is displayed on the CRT screen. Characters are displayed at the bottom of the screen and each line of information ” scrolls ” upward as the next line is entered. The screen can display 24 lines of up to 80 characters per line. The character set consists of

64 displayed and 98 generated ASCII characters. A cursor indicates the next data entry position; it can be moved left or right with or without the Space-Over-Data function

( described elsewhere ).

1 Operational Description
Communications Interface Display Format
Functions Provided
Operator Controls
.1 Control Descriptions
Power Line Connections Interface Connections
RS232C Communications Interface Current Loop ( 20 ma. ) Interface TTL Logic Interface
Optional Printer Output
Optional Composite Video Changing Formats and Features
Setting Baud Rate
Connecting a TELERAY to.a Teletypewriter
3.0 Maintenance
General System Orientation/Organization Power Supply Theory of Operation
Keyboard Theory of Operation
Logic Theory of Operation – Introduction
Timing Section Memory Section
Input/Output Section
Notes on Asynchronous Data Transmission USA Standard Code for Information Exchange TELERAY Display Font
Timing Waveforms
5.0 5.1 5.2 5.3 5.4 5.5
Fault Isolation
No Characters Displayed Incorrect Display Intermittent Problems
1/0 Problems
Power Supply Problems
KC44701 KD44702-1 KD44702-2 KD44702-3 KD44704
C44705 53SW1

1991 Apple Display and Printing Products brochure

Presented online is an archive of the 1991 Apple brochure titled “Apple Display and Printing Products”.

  • Epson Perfection V700, 600dpi, no enhancements
  • Sattva Descreen
  • Photoshop to merge and edit. Work includes per object and text-box levels, overall background balancing where possible
  • Tesseract 4.0 for lossless OCR and PDF generation
  • Download TIFF/RAW/PDF at the link below. Naviate: Scanned Book and Magazine Collection’ -> Apple Brochures. Or enjoy the low-res JPGs below.
  • Cool becuase it features the rare 21″ Colour CRT.

Collins Guide to Modern Technology by Robin Kerrod

Navigate to directly download: Scanned Book and Magazine Collection -> General Vintage Computing Books -> Collins Guide to Modern Technology by Robin Kerrod rev2.pdf
ISBN 0 00 102134-6
Do you love photos of tech in the 80s? This is for you!

First published 1983 by William Collins Sons & Co Ltd
Written and designed by Robin Kerrod
Illustrations and diagrams by Ian McIntosh, John and Mike Gilkes, Bryan Foster.

I found this book at a local op-shop and couldn’t pass it by. The books narrates a wide range of technologies from the 1980s. Subjects are at the TOC:

Consider your PDF view, can you set it to two-page zoomed to fit?

Some PDF viewers add a ‘seam’ down the middle, others perfectly join the left and right pages together. FoxIt PDF viewer is particularily good for two-page views. I consider this PDF an essential ‘scroll through’ as it is full of photographic examples of how computers are applied in industry (of the eighties). Aimed at all ages – not just children.

Printed pages match PDF page numbers; lossless OCR engine by Tesseract 4.0, my magic.

GBS-Control 8200 IIGS Scaler masterclass

As written by Jeremy Barr-Hyde.  Please note the term ‘masterclass’ is a joke / piss-take at Oprah Winfrey for calling her TV show a “Masterclass”.

Reference PDF documents and photos in Google Drive folder

The aim of this essay (jokes) is to introduce the GBS-Control project to vintage computing enthusiasts that want to use modern displays with their computers.  It will begin with components to buy and then list the hardware modifications and install steps.    Later I rationalise the benefits of this implementation, especially for the Apple IIGS computer.  Step by step instructions are provided, along with photos and commentary. 

If you are a visual learner, scroll to the end of this post and click through all the captioned photos instead.

Background of hardware and chipsets:

GBS8200 originates as a mass-produced video scaling board that supports analogue RGB video standards that were commonly used in arcade games and gaming consoles from the 1980s.  It is low cost hardware based on the TVIA TrueView 5725 scaling chip.  It is controlled by a Myson MTV230GMV microcontroller and has 64mb SDRAM. 

Inputs are  RGB video with Composite Sync preferred (C-SYNC), or Component Video (Y Pb Pr).  15Khz / 240p / 480i and 31khz 480p is supported.  The output is always RGBHV with TTL level sync that is buffered by a TI 74HC125.  Power input can range from 5-12volts and draw, with ESP8266 connected and on, is approximately 450mA at 5v. 

Of most intrigue is the debugging / System Programming mode jumper setting and SCL/SDA accessibility.  The board seems to be designed for modification.  Especially considering the poor performance when left unmodified / stock firmware. 

Background of video scaling:

Video standards are rapidly changing to accommodate advancements in resolution and display devices.  This can be seen from the 1950s with NTSC designed to accommodate colour video transmission through to 2020 with HDMI accommodating 4K 120fps HDR digital video signals.  The 1980s saw video standards evolve with home computers to move from composite video on the Apple II, S-Video on the Commodore 64 and 15KHz analogue RGB C-SYNC on the Apple IIGS and Commodore Amiga.  IBM transitioned through CGA/EGA/VGA standards which further brought connection and sync changes.  It is hard to keep up!

Scaling is a broad term that means a low resolution image is upscaled to a higher one.  Home theatre enthusiast have used scalers to clean up video and upscale it to better suit their display (e.g projector).  Until recently the market revolved around video scaling / format conversion but failed to cater for the unique RGB video formats in vintage computers.  Products by DVDO and Extron were a gold standard for home theatre and cost thousands of dollars.  Scalers sold in 2020 can cost thousands of dollars and are designed for digital format conversion and rarely have the RGB input that we need.

Only in recent years have more scalers emerged on the market to better support scaling of non-video (e.g. 480i) signals.  The Open Source Scan Converter (OSSC) is approximately $250 AUD and supports a wide range of RGB video signals such as those from the Apple IIGS and Amiga.  However versatile it may be, it has many shortcomings such as issues locking onto a stable IIGS picture and cost.  A flagship feature of the OSSC is it only supports integer scaling in line multiples, which creates a major problem for display compatibility the output is not a standard CMT/VESA resolution.  GBS Control offers a range of standard 4:3 output resolutions such as 640×480 (2x), 1280×960 (4x) and 16:9 1920×1080 (non-integer).

Computing use:

For home computers that use the analogue RGB standard, we have the added complexity of specific video formats that can change.  The Apple IIGS has both 50 and 60hz support, along with low and high resolution modes.  The Commodore Amiga has even more video modes that support progressive and interlaced output.  Video scalers have been geared towards supporting deinterlacing video signals opposed to scaling progressive video from a home computer at high speed.  This leads to a wide range of problems such as a halving of resolution and flicker due to deinterlacing incorrectly being applied.

Aim of the original GBSControl project and firmware:

My understanding is an Australian electrical engineering student “dooklink” began developing a custom firmware to control the GBS8200.  He needed a scaler that could scale his gaming consoles such as the Sega Megadrive for display on modern CRT monitors.  The earliest date I can find is 07/11/2014 where he registered on the Shmups forum to introduce his ideas for the project.  Initially he controlled the GBS8200 board with an original Raspberry Pi to program the ‘register settings in the scaling chip’.

Development of the custom firmware:

My understanding of this project is that it quickly gained traction online and eventually moved to Github where the code has transitioned to support an ESP8266 ESP-12E based Arduino and is maintained by ramapcsx2.  It’s been 6 years of changes, and I can only marvel at the online community’s participation in the project.

Summary of features that I have adapted from the current Github project page:

  1. Very low lag: Undetectable added delay, measured at less than 7 milliseconds (!).  For example, when the mouse is moved, it will display onscreen as you would expect.  Poor scalers will add up to 100ms of ‘lag’ which makes moving the mouse  like a block of soap.
  2. Sharp and defined upscaling:  The custom firmware scales by integer to best promote equal line widths and geometry.  One preset outputs 1280×960 pixels which is a perfect integer x4 scale, or for compatibility it can output 1920×1080.
  3. Useful features and image enhancements: The picture can easily be moved and resized in any direction.  The firmware automatically adjusts the AGC (automatic gain control) for brightness adjustments each time the input changes/scaler turned on.  ‘Peaking’ ensures sharp digitization of the video by normalising peaks of voltage transitions.
  4. WiFi control built in.  While it can automatically run unattended and offline, you can easily control the scaler using a web browser. 

Suitability for Apple IIGS users:

IIGS Dither Scalines 50 Line filter ON 1080p

The Apple IIGS outputs 0.5v p-p analogue RGB video with clean Composite Sync at 4v, with a pixel dot clock of 16mHz.  These non-standard specifications were suited to the matching Apple RGB monitor only, and present a challenge for most scalers to ‘get right’.   In my experience of scaling this output to HDMI using the Extron RGB-HDMI 300 and Open Source Scan Converter has been a little frustrating.  I lost countless hours tweaking the input parameters such as pixel phase to achieve a clear desktop/Finder image but a resolution change would cause things to go out of phase again. 

The GBS8200 with GBS-Control custom firmware offers complete compatibility with the Apple IIGS video output.  I have demonstrated this in short YouTube videos demos based on extensive personal testing.  It is the only solution that I’ve tested that correctly and automatically adjusts for 40/80 column video modes, higher resolution Apple II colour modes (in RGB) and the Finder, providing flicker free square pixels.  What a revelation!

Cost: There simply isn’t a product or solution on the market that can offer compatibility as described for approximately $80 Australian dollars. 

Availability:  If one was to use an Extron/Kramer scaler then you’re facing a second hand market with variable pricing and some units over 10 years old.  The GBS8200 is still mass produced in China at low cost, as is the ESP8266 Arduino. 

The next step: The scaled video output is RGBHV from either a JST connector or VGA/HD15 port.  Modern display devices feature HDMI as a convenient connection, and we now use a low cost VGA to HDMI transcoder to output the scaled video as HDMI with sound.  Simply connect the supplied cable from the headphone output of the IIGS to the adapter sound in jack. I have tested a widely available (pre-COVID) device that is based on the MSP9282 chipset by Hefei Macro Silicon technology.  It features a claimed 10-bit per channel ADC for sampling the video to digital and outputs a HDMI compliant signal.  Simply connect the supplied cable from the headphone output of the IIGS to the adapter sound in jack.

Implementation:  The GBS8200 board from factory requires basic hardware modification and an ESP8266 to be programmed and connected.  For newcomers I would expect some difficulty following the whole project as it’s a lot to take in.  In months to come you’ll wonder why you didn’t try this earlier!

Apple IIGS Pinout:

Solder the included video wire to the following pins of the DB-15M connector

I recommend holding the wires together, slip on heat shrink tubing then trimming 1-2mm of the tinned wire off.  Solder as below, assemble DB shell.

IIGS SignalPinSupplied JST Wire Colour

Full list of required components to buy for Apple IIGS usage outputting HDMI:

  • GBS8200 or GBS8220 (scaler)
  • 5v 1A power supply (PSU)
  • USB-A to 2.1mm DC Barrel jack cable
  • ESP8266 12-E Arduino (Controller)
  • One 470-ohm or 330-ohm resistor 1/4watt
  • One 22uf capacitor, electrolytic, starting at 6.3v tolerance
  • MSP9282-based VGA to HDMI converter/transcoder (not required if using a VGA monitor)
  • DB15M (male) solder connector
  • DB15 Shell

Full list of bench equipment that I expect you to own already:

  • Soldering iron
  • Solder
  • Quality wire for connecting the scaler to controller (remember video and power wire is supplied). 
  • Rosin or No-clean flux and copper braid for de-soldering.  Multi-layer PCB and lead free/thick solder from factory.  Avoid excessive force in removing components. Alternatively/not expected, use a desoldering pump+iron with flux and you’ll easily move on to the next step
  • Small snips for cutting out RP1,2,3 if not de-soldering (remember the lead free/thick. 
  • Clipped leads from axial capacitor / anything to make a 4 sets of a 1cm jumper bridge (enables debug mode and connects RP pads)
  • Hot glue / snot for daub of strain relief on certain wires
  • Wire stripper tool or competency stripping wire
  • HDMI cable

What comes with the GBS8200:

  • GBS Board
  • RGBHV + Ground wire to JST connector, pre tinned from factory.  I like the quality!
  • 2 wires to JST connector for connecting +5V and GND from the scaler to controller

Ideas how to power everything

We have up to three active components to power from a single source and therefore strictly use +5v for input to the 2.1mm barrel jack (center positive).  JST Connector P9 traces directly to the directly to barrel jack input P7.  The included wire for P9 can be shortened and soldered to the controller’s VIN and GND pads to supply it with +5v.  Then flip the board over to add a microUSB cable to the + and – pads of P9.  Discussed below.

  1. Scaler ~350-500mA
  2. Controller ~150mA (max)
  3. Transcoder ~20mA (ultra low current/draw). 

The HDMI transcoder comes with a microUSB to USB-A cable and this can be modified to run from the scaler board.  One can cut the USB-A port off and strip the cable back to reveal a red (Vcc) and black (Gnd) wire, to be soldered to the scaler.  Flip the board over, solder the underside of P9 for VCC and GND.  Please check continuity throughout.  This gives you a microUSB cable with +5v on it that is long enough to reach the transcoder.

Required modifications to GBS8200 hardware and commentary. 

  1. Remove the orange pots RP1, RP2, RP3 and then bridge them (the lower left pad to the top).  This avoids low brightness and colour tint problems. 
  2. Add a 470-ohm resistor across sync and ground.  The Apple IIGS outputs a relatively strong sync signal and we want to avoid the scaler’s 3.3v logic level chips being overloaded with our unregulated sync input.  This modification is easily achieved.  Simply solder this resistor on either side of the scaler across sync and ground poles on the left of the board.  See photo.  Rationale in appendix. 
  3. Replace C11 with 22uf 6.3v (or higher voltage tolerance) electrolytic capacitor.  I like to clean the pads of C11 and leave it unused, in favour of soldering directly to the LDO as show in my photos.  Right sided pin is negative – we are moving from ceramic to electrolytic so observe polarity by continuity testing the left and right side of the pads to ground. 
  4. Bridge/close P8 (programming port).  Simply bridge this on the underside of the board.  No need to nick a jumper from an old hard drive.
  5. Tin the MTV230GMV debug pin 30.  This is for connecting to D6 of the controller/ Arduino.  This allows control of TrueView chip registers. 

In summary we remove 3 pots, add a resistor, upgrade a capacitor and bridge P8. 
Easy! Compare ze market!

In all seriousness though the removal of RP1,2,3 is the most time consuming step.  The thin board may lift a pad and this is easy to fix.  Do not worry if a pad lifts as there is always at least one other spot to use in it’s place. 

Programming the ESP8266

ALL Arduinos from me have been pre-programmed with GBS-Control firmware and are ready to solder in place.  

Otherwise, Program your Arduino as per instructions on Github.  This requires the firmware project files, programming software and miniUSB B cable.  Personally the Arduino programming was worked well but again did require a level of specificity these boards are famous for.  E.g setting CPU speed and flash size.  A PDF version of the Github based instructions are provided in the appendix as a PDF file.  For further simplicity, I have copied a summary as written by ‘Syntax’ to the appendix also. 

Installation after modifications:

  • Solder in your wire from scaler to controller.  The pinout from scaler PCB to Arduino controller is SCL = D1; SDA = D2, Myson Pin 30 = D6. Add strain relief to the wire.
  • Solder in your power. The red and black wire with a JST plug is connected to the scaler and red wire soldered to the controller’s VIN, black wire to controllers GND.
  • MicroUSB cable – cut the USB-A plug off, strip the shealth and solder the red wire to the + pad and black wire to – pad on the underside of the board.  
  • Solder your bundled wire to the DB15M connector for connecting the scaler to your Apple IIGS following the pinout on the previous pages.
  • Connect the HDMI transcoder to the VGA output, with sound from the IIGS 3.5mm mono out.  The output will default to 1280x960p automatically.   
  • Profit. The ESP8266 should beacon out it’s own WiFi Access Point. 

SSID: gbscontrol    PW: qqqqqqqq
Connect to http://gbscontrol.local or the devices IP address to adjust a wide range of settings and join it to your home network. 

In summary you connect your Arduino as follows: SCL = D1; SDA = D2, Myson Pin 30 = D6.  Colour by numbers!

Note: Consider adding strain relief to wires such as hot glue or fixation with nail varnish.  Clearly I am obsessed with strain relief. 

Si5351 Clock Generator install notes (entirely optional and not relevant for most people)

The Is Si5351 Clock Generator board is controlled by I2C to output precise frequencies from <8KHz up to 150+ MHz.  Input VCC is 3-5v and output is 3vpp.  The GBS-Control firmware automatically supports this board when installed as follows:

Solder a wire from the centre pad of CLK0 to TrueView pin 40 (PCLKIN). Check for continuity and resistance. Remember only the centre pad for CLK0 is for signal. In my board I have used prepared AWG32 enamelled copper wire.

With the scaler board oriented with text facing you, the left side of either C47 or C48 can be used for ground when soldered to the first or third pad of CLK2. I used AWG30 Kynar with the smallest amount of exposed wire, flux and a small amount solder.

For powering the clock gen, solder a wire from the positive side of either C47 or C48 to the unlabelled capacitor shown on the clock gen board. It is most likely a filtering capacitor for the clock’s LDO 3.3v output. Again I have used AWG30 Kynar wire and clear varnish for fixation to the PCB.

The Myson Controller (MTV230) is connected via

– Pin 15 (P3.0/Rxd/HSCL) to Si5351 SCL

– Pin 16 (P3.1/Txd/HSDA) to Si5351 SDA

This can be achieved by soldering directly to each controller IC leg (no lift) as I have done. 

Alternatively one use the output side (right) of R10 for SCL and R37 for SDA.  Add strain relief.

To test the clock generator is working, open the GBS Control web gui.  Go to Preferences and scroll down to Activate FrameTime lock.  Press on the FrameTime Lock button and the console will read “Active FrameTime Lock not necessary with external clock gen installed”.  Video output should be pristine and free of horizontal tearing when high output resolution presets are used.

Ian’s rationale for attenuating sync:

Do not connect the sync output of an Amiga or a LM1881 sync stripper direct to a GBS-82XX board. Both devices have a logic 1 level of >4.6V! The maximum input voltage for the TVIA-5725 device is 3.6V. If you exceed the absolute maximums, you start activating the ESD protection diodes on each input, never a good idea. The excess voltage is clamped to the device internal supply by these diodes, so the 3.3V internal (to the TVIA-5725 device in this instance) gets spikes every time the input is exceeded, pulling up it’s supply.  This does affect the normal operation of the device and reduces reliability. Simply connecting the CSYNC output of an Amiga or the Composite sync output of an LM1881, to the GBS-82XX board, via a 680 ohm series resistor, removes this problem. I measured a signal amplitude of 3V.”


Link to download IIGS pinout reference:

Berkeley Macintosh User’s Group Newsletter scans

A recent donation has awoken my scanning interests and today we have another 16 scans added to my publicly shared repository. All 16 are not known to be on and I will make a mirror there soon. Of great interest were the huge Berkeley newsletter books. Presented here are 600dpi scans with Tesseract 4.0 neural network OCR applied.

Australian Mac users were well supported with the bespoke evalgesim of local MUGs. Berkeley (American) is on another level though, never have I seen such a valuable resource in one place. From just the two titles donated, we have over 600 pages of historic Macintosh information. Being more user focused, one can read a wide range of letters to the group that ask questions or seek solutions to bugs. Reading these BMUG scans will immediately bring back that unique pleasure and pain of being a Macintosh user – facing expensive accessories, printer bugs and getting good value software. You’d think your Macintosh was limitless in it’s capacity, from scanning photos in dithered black and white to MIDI music playing, its all there.

If you’re a Mac enthusiast or nostalgic for the era of Compact Mac, do yourself a favour and download a BMUG newsletter from my repo. I prefer syncing PDF files to my iPad via “Foxit PDF reader” (free).

Find these under Scanned Book and Magazine Collection -> Magazine Scans -> Berkeley

Raft Away River, Australian Apple II software with manual

Update 2020-07-26: Newly restored front box art and new scans of manuals from originals at 600dpi.  Title screenshots updated. 

Raft Away River by Jacaranda Wiley
Presented here are

  • Apple II disk label scan
  • Front artwork as restored by Jeremy
  • Teacher’s manual and student’s guide booklet scans from originals
  • Apple II disk image (140kb DSK)
Navigate through the folders:  Apple II Software -> Raft Away River, Jacaranda

Raft-Away River front JBHRaft Away River 002Raft Away River 001

This Apple II software is easily ran or played directly in your browser using’s one-click emulator here:

Raft-Away River is a game for 2 to 6 players. It is a special
sort of game called a simulation. This means that the
computer shows you a model of an adventure and you can
experiment to see what you could do if you really had such
an adventure. But, unlike the real thing, you can’t come to
any harm in a simulation. So, if your plans don’t work out
as they should, you have a chance to try again using some
different ideas. If you think hard about why your plans didn’t
work, then you might learn why some plans fail. Of course,
you will also learn how some other plans work’

First published 1984 by
65 Park Road. Milton, Old 4064
140A Victoria Road, Gladesville, N.S.W. 2111
90 Ormond Road, Elwood, Vic. 3184
4 Kirk Street, Grey Lynn, Auckland 2, N.Z.

A product of Jacaranda Software
Program designers: Rosanne Gare and David L. Smith
Production editor: Wynrie Webber
Apple version programmed by Gerald M. Wluka
BBC version programmed by David L. Smith
Commodore 64 versions programmed by Philip O’Carroll
Microbee versions programmed by Gerald Preston·

Bumper Books of Programs Australia

A Your Computer Publication “Bumper Book of Programs”, covering programs for all ages and popular brands.  I scanned this book becuase it has a large list of Australian Computer Clubs such, ranging from the Blue Mountains Microbee Computer Club (Roger Cooper) to the Spectravideo Computer Users Group in Tasmania.

Worthwhile to have online.  PDF available by navigating Scanned Book and Magazine Collection -> General Vintage Computing Books -> Bumper Books of Programs Australia.pdf

Screen Shot 2020-01-05 at 12.51.14 pm.jpg

The book was partially water damaged so I had to restore the front cover in photoshop the best I could, and one or two pages are missing the very edge of the page.

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