S100 Computers

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History of S100Computers web site updates
This page contains a list of past changes made over time to this web site.  It's probably not of general interest.
If you wish to see recent changes/news etc. please click here.

5/18/2017     Added a test program for the voltage lever converters on the Edison Board
5/4/2017
     Description of V1.0 Digital PDP-11 S100 CPU board
4/16/2017
     Programming GALs with WinCUPL
3/17/2017
     First description of Digital PDP-11 S100 CPU board
3/16/2017
     Update and build steps for the Edison CPU board (Video Added)
3/8/2017
     Updated KiCAD footprint libraries to include recent specilized chips
2/19/2017
     First description of Edison S100 CPU board
12/17/2016
     Minor updates to Z80 ROM Monitor (Master.Z80)
12/9/2016
     Updated list of boards on reorder by users.
11/9/2016
     Description of V3 8MB OTT Static RAM Board
10/14/2016
     Updated 80386/80486 Monitor Software
10/8/2016
     Description of Dazzler II Video Board
9/19/2016     Converted all video files to .MP4 format. Removed Flash requirement.
9/13/2016
     Description of Sham Com and its use to upload a file from Windows 10 directly into RAM on the z80 SBC via a USB serial link
9/7/2016
     Description of board etching error on V2a 80286 CPU board
9/1/2016
     Description of V3 32/64MB S100-OTT Static RAM Board
9/28/2016
     First Description of the new Dazzler II Video Board
8/9/2016
     Description of Full Size 80486 CPU Board
8/9/2016
     Description of the Trident 16 Bit VGA Board6/2/2016      Description of Rev 1 of 8080A CPU Board
5/11/2016  
 Construction notes for Baby 80486 Added
5/4/2016   
  Added info on Morrow HDC-DMA Controller
5/3/2016
      Added board jumper table for the 80386-II board assembly description (and further notes)
4/25/2016   
 Initial description of 80486 S100 Bus CPU Board
4/23/2016   
 Added info on Artec Electronics
3/30/2016     Modification of GAL code for VGA board to work with future 80486 CPU board
3/21/2016   
 Introduction to the 8MB Mezzanine RAM mini-Boards
3/20/2016   
 Description of OPL3/Game/Serial Board
3/8/2016    
 Added information about installing CPM3 image on a CF-card for the Z80 SBC
3/5/2016    
 Description of MEM8 Plus Board
2/13/2016  
 Updated description of how our S100 boards are designed and fabricated. Centralized downloads to one page
1/23/2016  
 Updated "Bringing up MSDOS for the First Time"
1/14/2016   
 CPLD Programming Motherboard
12/20/2013 
 Introducing a new CPLD based 80386 Master/Slave CPU Board and 32/64 MB RAM Board
12/14/2015 
 A fourth version of our 16MB Static RAM board, the V6 board.
11/13/2015 
 Build instructions for the Z80 based S100 bus single board computer - a starter S100 bus CPU board.
11/11/2015 
 Updated Console-IO board with addition of keyboard adaptor
11/5/2015  
 Update/corrections to V5 16MB Static RAM board
11/1/2015  
 Initial description of CPLD based 80386 CPU Board
10/8/2015  
 Update on  Z80 based S100 bus single board computer - a starter S100 bus CPU board.
6/6/2015   
 Bringing up MSDOS in an S100 Bus system
6/6/2015   
 Description of the Tarbell Z80 CPU Board
6/4/2015    
 Description of V3, MSDOS Support Board
5/31/2015  
 Description of a V5, 16 MB S100 bus Static RAM board
5/16/2015  
 Added building instructions for the V3 IDE/CF Card  Board
4/9/2015   
 Added building instructions for the V3 SMB
3/13/2015  
 An S100 bus VGA Video board
3/11/2015   
 A proposed V3 version of the SMB
2/12/2015   
 A proposed V3 version of the IDE Board
2/4/2015     
 An S100 Bus VGA Board
2/1/2015     
 Added a section on hardware debugging the 80386 board
12/14/2014 
  Description of a IMSAI style Front Panel S100 Board
11/12/2014 
 Added building instructions for VDP video board
10/29/2014  
Description of new 16MB static RAM Board
10/23/2014  
 Updated Ackerman Digital history page
9/14/2014   
 Updated list of S100 bare boards available
8/30/2014   
 Update on the ISA to S100 Bus Converter board using a GAL driven board
8/9/2014      Updated
8086 and 80386 monitor programs
8/4/2013    
 Added information about the SC Digital 1MG DRAM Board
7/31/2014   
 Writeup and description of a new S100 8080A CPU board
7/26/2014   
 Added Dave Fry and  Dave Mehaffy's notes about a  new simplified CF-card CPM3 Image generating process for the IDE Interface board
7/22/2014   
 Final writeup and description of the S100 bus 16MB static RAM board.
7/20/2014     Updated
Z80 (Master), 8086 and 80386 monitor programs
7/15/2014   
 Added description of V2 version of RAM+ROM board
6/24/2014   
 Added build instructions for the new 80386 CPU board
6/21/2014   
 Description of a prototype MSX style VDP S100 Video Board
6/2/2014     
 Added build instructions for the new S-100 Bus System Monitor Board
5/31/2013
      Added build instructions for the new 16MB Static RAM board
5/28/2014    
 Description of final 80386 Prototype CPU board
5/22/2014    
 Added build instructions for the new V2 80286 CPU board
10/23/2014   Updated Ackerman Digital history page \
9/14/2014     Updated list of S100 bare boards available
8/30/2014     Update on the ISA to S100 Bus Converter board using a GAL driven board
8/9/2014      Updated 8086 and 80386 monitor programs
8/4/2013      Added information about the SC Digital 1MG DRAM Board
7/31/2014    Writeup and description of a new S100 8080A CPU board
7/26/2014    Added Dave Fry and  Dave Mehaffy's notes about a  new simplified CF-card CPM3 Image generating process for the IDE Interface board
7/22/2014    Final writeup and description of the S100 bus 16MB static RAM board.
7/20/2014    Updated Z80 (Master), 8086 and 80386 monitor programs
7/15/2014     Added description of V2 version of RAM+ROM board
6/24/2014    Added build instructions for the new 80386 CPU board
6/21/2014    Description of a prototype MSX style VDP S100 Video Board
6/2/2014      Added build instructions for the new S-100 Bus System Monitor Board
5/31/2013    Added build instructions for the new 16MB Static RAM board
5/28/2014    Description of final 80386 Prototype CPU board
5/22/2014    Added build instructions for the new V2 80286 CPU board
5/14/2014    Added build instructions for the new V2 MS-DOS support board
5/3/2014      Enlarged the 68,000 Monitor program to allow file downloads from a PC using the XMODEM protocol.
4/26/2012     Electrical and Electronic Engineers Plaque to Honor Gary Kildall
4/20/2014     Introduction to KiCad (a printed circuit board layout program)
4/8/2014      Introduction to GALs and programming with PALASM
3/21/2014     Uodated picture and info for CompuPro's National Semiconductors 32016 CPU S-100 board
3/1/2014       Description of the V2 Version of the System Monitor Board
2/26/2014      Description of a 16MB S-100 Static RAM Board
2/24/2014     Description of the V2 Version of the MSDOS Support S-100 Board
2/5/2014       Description of the V2 Version of the 80286 CPU S-100 Board
1/31/2014      Description of the V2 Version of the Z80 CPU S-100 Board
12/28/2013    Description of the Cromemco dazzler Board with software
12/25/2013
     Updated information on new clock circuit for 80386 board
12/25/2013
     Update description of V2 of our Parallel Ports IO Board
12/17/2013
     Further additions to the Dynabyte Computers section
12/8/2013
      Further additions to IMS Boards section
12/3/2013
      Added update to V2 of Extender board (bottom of page)
11/28/2013
    Update pictures of IMS 80186 CPU Boards
11/20/2013
    Construction Notes for the production version of the 1MG RAM+EPROM S-100 Board
10/27/2013
    Updated 80386 board and first description of the 32 MB Static RAM board
10/27/2013
    Added construction notes and updates for the 80286 Master/Slave CPU Board
9/22/2013
     Added construction notes for the production version of the Parallel Ports IO Board
9/12/2013
     Added construction notes for the production version of the Master/Slave 6502 CPU Board
9/2/2013       First description of a New 1MB Static RAM + EPROM Board (8 or 16 Bits)
8/26/2013     Update 80386 Monitor software
8/18/2013     Updated 8086 Monitor software
8/13/2013     First description of a parallel ports I/O  board
8/12/2013     First description of an IBM-AT ISA bus to S-100 bus converter board
8/11/2013     First description of the MSX compatible VDP S-100 Video Board
7/22/2013     Added information and manual for the IMSAI MPU-B 8085 CPU Board
7/13/2013     Added information and manuals for the Marinchip TMS-9900 CPU S-100 system
7/5/2013       Added an example of an 8 bit EEPROM with 60K Static RAM (for Z80's etc), to the EPROM/RAM Board description
7/2/2013       Added to Assembly Language Common Routines
6/6/2013       Added information and Manual for Morrow DJ-DMA FDC Board
6/6/2013       Reformatted/modified History Page
5/30/2013     Added early electronic history information to the history page
5/26/2013     Updated information on a number of S-100 Boards, in particular Alpha Micro
5/18/2013     Added Information about S100 Bus Terminator & Prototype Board
5/11/2013     Added picture and manual for CompuPro Interfacer-I Board
4/21/2013     Description and Construction Notes for the 68000/68010 Master/Slave  S-100 CPU Board
4/15/2013     Final Prototype 80386 and 8 MG Static RAM Board

3/9/2013       First working prototype of Static RAM daughter board working with 80386 CPU board
2/15/2013     First Description Of The 80386 Monitor
2/8/2013       Updated Software Index Page (PCLOAD, 8086 Monitor etc)
1/28/2013      Build instructions for the Lava-10 VGA Video board
1/12/2013      Added Description of MiniTerm Associates Merlin Video Board

12/20/2012    Further progress with S-100 master/slave 80386 CPU Board (bottom of page)
10/16/2012
    First description of the S-100 master/slave 80386 CPU Board
10/14/2012
    Status update on Cirrus Logic GD-5420 VGA Board. ISA Prototype working
9/16/2012
      Updated 4MG Static RAM board description to actually contain 4MG of RAM
8/11/2012
      Description of 8088 CPU Final Production Board
8/3/2012
        First discription of Master/Slave IEEE-696 style 6502 CPU Board
7/31/2012
      Added manual for Lomas "Hasitall I/O" Board
7/16/2012
      Updated several of the Intersystems S-100 boards information and pictures.
6/8/2012
        First discription of Prototype 80286 Board
6/24/2012
      Description of V2 Prototype of LAVA-10 SVGA Video Board
5/10/2012
       First discription of LAVA-10 SVAG S-100 Video Board Prototype
4/18/2012
       Added picture and manual for Cromemco DPU (Z80/68000) board
4/9/2012
         First description of new 8088 CPU Prototype Board
4/4/2012
         Added description of CompuPro MS32016 CPU board and Marinchip TMS 9900 CPU boards
3/31/2012
       Description and assembly of the final version of the MSDOS support board
3/28/2012       Updated
Z80 Monitor, IDE Diagnostic Program, 8086 Monitor and 68K Monitor Programs
3/12/2012
       Update on second prototype of the 68000 CPU Board. Master/Slave version now working
2/23/2012      
Added information about the TecMar 8086 CPU Board
2/8/2012
         Added the 6809 CPU to the history of CPU's page
1/30/2012
       A 6502 CPU driven S-100 board
1/8/2012
         First discription of a VGA S-100 video board prototype
12/21/2011     Cleaned up and corrected some minor errors on the History page
12/18/2011     Added CPM3 BIOS clock support for DS-12887 CMOS RTC chip on MS-DOS Support Board
12/14/2011     First description of MSDOS Support Board
12/14/2011     Build instructions for 8086 Board added
11/27/2011     Updated 8086 and Z80 Monitor codes to incoporate DS-12887 CMOS Real Time Clock Chip
11/14/2011     Added a description of the prototype 68000 CPU board
11/2/2011       Added a historical writeup on CPU's used in common desktop computers.
10/19/2011     Updated the S-100 Boards section with data for some of the lesser well known boards
10/18/2011     Update Propeller Driven ConsoleIO .spin software so the CTRL and ALT keyboard keys are recognized.
10/16/2011     Update of 8086 Monitor added. Now includes CGA/VGA video board interrupt routines.
9/26/2011       Updated information on V2 of the E-PROM Board. (Also added pinouts for EE-PROMS)
9/18/2011       Added the NASM 8086 Assembler to the Assembler Downloads collection
9/17/2011       Enlarged the 8086 Monitor to allow MSDOS (V4.01) to boot from an IDE card.
9/17/2011       Added a writeup on displaying CHS & LBA information for sectors on the Dual IDE Drive Board
9/16/2011       Added note for SMB about tracing through Z80 CPU E-PROM's (Bottom of page)
9/7/2001
         Updated 8086 Monitor to contain an IBM-PC "like" BIOS. Can Boot MS-DOS V4.01
9/6/2011
         Updated changes made to V2 of PROM Board
8/7/2011
          Added new entry to News page
7/10/2011
        Added picture of final production version of the Dual IDE Drive S100 Board
6/21/2011
        Bringing up CPM86 Plus on an 8086 S-100 bus  system.
6/21/2011
        Introduction of a New 8086 ROM based Monitor
6/19/2011
        Introduction to a new S100 8086 board
5/29/2011
        Added information about my custom Floppy Disk Drives Unit
5/26/2011
        Added information on the final prototype version of the Dual IDE interface board
5/23/2011
        Final version of the Propeller Driven Console-IO board described.
5/2/2011
          Added a description of the V2 IDE S-100 Board. Now it can accommodate 2 CF cards
5/1/2011
          Software updates to allow the ZFDC board to work with 1.2M 5" and 1.44M 3.5" MSDOS disks
4/29/2011
        Added information about connecting 5" and 3.5" drives to the ZFDC Board
4/23/2011        Update on Version 2 of the Zilog SCC Serial IO board
4/18/2011        Description of the Final ZFDC controller board
4/10/2011        Description of the final version of Propeller driven Consol IO Board
4/1/2011          Description of second version of Propeller driven Consol IO Board
3/15/2011        Bringing Up CPM3 for the First Time -- Writing a CPM3 BIOS for an IDE Hard Drive
3/14/2011        Updated S-100 Board IDE Drive Diagnostic software (MYIDE.ASM) and web page
3/14/2011        Added a 4K ROM based version of MYIDE.ASM (MYIDEROM.ASM)
3/06/2011        Added Instructions for Bringing Up a Banked Floppy Based Version of CPM3
2/26/2011        Bringing Up CPM3 for the First Time -- Writing a CPM3 BIOS for a FDC Board
2/1/2011          Further additions to the ZFDC board write-up. (3rd Prototype finished).
1/24/2011        Updated IDE Board diagnostic program
1/20/2011        Further additions to the ZFDC board write-up.
1/17/2011        Added links to the newest schematic of all New S100 Boards (at the bottom of each new boards page
12/25/2010       Update of Z80 Based S-100 FDC Board utilizing the Western Digital WD2793 Chip (Second draft)
12/6/2010        Updated a number of boards in the ECT company/history section
11/20/2010
      Described construction notes of the final Z80 CPU board
11/14/2010
      Described construction notes of the final PIC/RTC board
11/12/2010
      Updated section on Boards For Sale with some of our newer bare boards
11/12/2010      Updated a number of boards in the S-100 Boards section
11/11/2010
      A Z80 Based S-100 Floppy Disk Controller Board utilizing the Western Digital WD2793 Chip (First draft)
9/29/2010
        Added update on second Z80 prototype board (running at 10MHz)
9/25/2010
        Added construction notes for S-100 Serial IO Board
9/20/2010
        Added construction notes for S-100 EPROM/RAM Board
9/19/2010
        Described the final production board version of the S-100 bus extender board.
8/22/2010
        Started write-up on the a prototype Z80 CPU S-100 Board.
8/22/2010        Added construction tips on assembly of Final System Monitor Board.
8/4/2010          Added a description of the S-100 Serial IO Board with speech sysnthesis and USB port chips.
7/27/2010        Added a popup dialog box to explain the use of the 74LS682 chip for bus addressing.
7/26/2010        The S-100 Prototype board 7/24/2010 Added Section describing the new EPROM/RAM Board.
7/9/2010          Updated information on final version of PIC-RTC board with new video demos.
7/4/2010          Added some comments and suggestions at end of IDE Board section about the second batch of boards.
7/3/2010          Added description of new S-100 Extender Board
6/16/10            Added more detailed video showing single stepping functions with Version 2 of the SMB Board
6/4/2010          Added program & video showing the RTC chip interrupting the Z80 every 1 second using the PIC/RTC board
6/2/2010          Added picture and video of second draft of the S-100 PIC/RTC board in action
5/29/2010        Added picture of the second prototype version of the SMB Board
5/22/2010        Added section on the final version of the 4 MB Static RAM board. Updated construction instructions.
5/7/2010          Started a Section Containg Small Common Assembly Language Routines
5/7/2010          More work on Software section. Added downloads for all common CPM assemblers, linkers etc.
5/6/2010          Added extensively to the software section. Explained how to use CPM3 simulator
5/5/2010          Added a section for the MySYS NET/80 SBC
4/26/2010        An S-100 Interrupt Controller and Clock/Calendar board
4/21/2010        Added further information about the SMB board
4/13/2010        Added a description of the S-100 System System Monitor Board
3/25/2010        Added database for S100 Board status and orders
3/19/2010        Update on 4MB Static RAM Board. Prototype finished.
3/19/2010        Added section about the Intersystems Real Time Clock Board
3/19/2010        Added a section for Delta Products S-100 Boards
3/1/2010          Added section on Intersystems EPROM Emulator board
22/2/2010        First Description of the 4 MB Byte S-100 Static RAM Prototype Board
10/2/2010        Added a section describing the building of the S100 PC Keyboard Converter board and Software
1/31/2010        Updated IDE Board section with instructions about board building etc.
1/17/2010        Added patch to add 2716 EPROM to TDL SMB 1/17/2010 Added logic probe diagram to IA Z80 board.
1/2/2010          Added description of the  IBM PC keyboard to ASCII S-100 Converter board
1/1/2010          Updated many manuals and fixed broken links.
12/21/2009      Added picture of first prototype IDE board.
12/13/2009      Added information and pictures of Salota S-100 Boards
12/7/2009        Added new S-100 boards and info for Intersystem's, Advanced Digital and a few others.
12/6/2009        Added extensive software to the S-100 IDE board section to run CPM3 with it.
11/25/2009      Update Computalker and TDL SMB sections
11/14/2009      Updated my Z80 monitor section
11/8/2009        Debugging an S-100 System for Beginners
11/6/2009        Added Intersystem's 16-64K EPROM Board
11/5/2009        Added a new S100 IDE hard disk interface board to New Boards
10/16/2009      Added info and manual for TDL video board
9/25/2009        Added information about my Intersyystems Z80 CPU Board
9/17/2009        Added info about configurating the SD Systems Serial board to talk to a PC
9/10/2009        Added new Cromemco boards, updated info on others.
9/5/2009          Added info on Cromemco STDC board, Memory Merchant RAM & Mountain Hardware Boards
9/4/2009          Added Computalker & BusProbe boards
9/3/2009          Added ACOM 8088 CPU Board
9/2/2009          Added Lifeline IDE Controller and Heuristics Speechlab Boards
9/1/2009          Added SD-Systems I/O-8 Board and Harte Super-IO Board
8/21/2009        Added Piiceon, Measurement Systems  and updated Tarbell boards
8/20/2009        Added Romac H19 video, Multiflex boards  and Peak Electronics 68K board
8/20/2009        Added numerous board reviews from old Microsystems J. etc to various board sections
2/19/2009        Added info on Alpha Micro, Static Memory Systems, ECT  S-100 boards
8/14/2009        Added info on Scion MicroAngelo board
8/13/2009        Added info on BG Computer  and Konan S-100 boards
8/12/2009        Added info on TecMar, Pickles & Trout  and SemiDisk  S-100 boards
8/11/2009        Revamped the Seattle Computers Products boards section
8/11/2009        Added info on Omni and Fulcrum boards
8/10/2009        Added section on Advanced Digital Corp. boards
8/9/2009          Added more info on SD Systems boards (Other boards)
8/9/2009          Arranged index page of companies in alphabetical order
8//7/2009         Added section on XComp hard disk controller boards
8/6/2009          Added section on Macrotech boards
8/5/2009          Added section on I/O technology boards
8/4/2009          Added section on Teletek boards
8/2/2009          Added section for Lomas Data Products boards.
7/29/2009        Added and corrected sections for IMASI, DRC, S.C. Digital, Heathkit and Cromemco boards.
7/29/2009        Added section on S.C. Digital boards
7/28/2009        Added section on PMMI modems
7/28/2009        Added CompuPro Spectrum board and SSM 16K RAM
7/27/2009        Added sections for Seals Electronics, MITS FDC board, and Digital Research Computers boards
7/27/2009        Updated some CompuPro pictures sent by Richard Lvnch
7/26/2009        Added section on Ackerman Digital systems boards & Tarbell Electronics
7/25/2009        Added as section on Dynabyte (No manuals currently!)
7/24/2009        Added a small section on D.C. Hayes modem boards
7/22/2009        Added a section on Micropolis and their FDC
7/21/2009        Added a section on Matrox video boards      
7/21/2009        Added a section on Seattle Computer Products Boards
7/20/2009        Added Dual Systems S-100 boards information. (Still need quite a few manuals)
7/19/2009        Added Jade & Compu/Time S-100 boards info.
7/16/2009        Updated TDL, IMS, Polymorphic, IMSAI and Altair boards images
7/14/2009        Reformatted web site pages to have variable width text paragraphs.
7/12/2009        Started on CCS Boards
7/9/2009          Finished Solid State Music Boards, Wameco & PolyMorphic Systems
7/9/2009          Finished Altair and Processor Technology boards
7/6/2009          Finished IMS boards
6/19/2009        Started on NorthStar boards
6/18/2009        Started on IMSAI systems
6/14/2009        Started on CompuPro boards.
6/12/2009        Started entering info for Cromemco boards
6/8/2009          Added S-100 board info for SD Systems, TD, VG, Intersystems.
5/25/2009        Major work stated on site construction
12/15/2008      Started on site framework

This page was last modified on 12/03/2017