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Welcome to Walt Perko's Brainless.org-anizm
The Altair-Duino Pro

For Starters Maybe Join the Google Group
Visit the S100Computers.com website


Vintage S-100 Computer Stuff For Sale


Vintage Motorola MEK6800D1 For Sale


Building a Reproduction Altair 8800
Build Ideas to Help Make the Job Faster and Easier


The Minimum Components . . . . . . . . . . Altair 8800c Components
Altair 8800c Cabinet . . . . . . . . . . . . . . . . . . . . . Altair 8800c Cabinet
Power Supplies . . . . . . . . . . . . . . . . . . . . . Power Supplies
Back Plane . . . . . . . . . . . . . . . . . . . . . Back Plane
JAIR 8080A CPU Board . . . . . . . . . . . . . . . . Altair 8800 CPU Board
Front Panel Boards . . . . . . . . . . . . . . . . . . . . . Front Panel Boards
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88-2SIOJP Board
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FDC+ Board



- Starting the Build -

9-Slot Back Plane
Contact: Todd Goodman = tacoman656 gmail com to buy the blank board

9-Slot Back Plane Manual



The build on this is simply installing all the S-100 card slot connectors and Power Connector.

DigiKey.com or Mouser.com




6-PIN Power Connector Male & Female and wires
AllElectronics.com



Add jumper wires across the six "fuse" positions
or install the fuses, although they're not really needed since the power supplies shut down to prevent blowing anything in the computer up.

DO NOT Install any other components
I had already started building the back plane when I found I wouldn't need all the other components.
After installing the 9 edge connectors and the power connector, the three LEDs and their associated resistors is all that's needed.
The fuses should just be jumper wires.



Power Supplies
The recommended power supplies are smaller switching type.
The old giant heavy analogs are not used anymore.

MEAN WELL USA Inc.
You need TWO: "RS-25-15" for +15V and -15V
Digikey.com or Mouser.com or JameCo.com


You only need ONE: "HRP-75-7.5" for +8V
Digikey.com or Mouser.com or JameCo.com

a.c GND is Cabinet/Chassis GND and Should Connect to the Back Plane GND too!




Power Supplies Wiring Diagram



My First CPU Board Choice = JAIR 8080A CPU Board
Contact: Josh Bensadon jbensadon = hotmail com to buy the blank board

What you get with the JAIR 8080A CPU Board;

8080A CPU
Altair 8800 8-PIN Front Panel Connector
IMSAI 8080 16-PIN DIP Front Panel Connector
Up to 64K RAM System Memory
32K EPROM for Boot Strap Programs
Two RS-232 Serial Ports
SPI Serial Peripheral Interface
SPI SD Memeory Card
8-BIT Parallel I/O



The JAIR 8080A CPU Board Manual
Find the well done BOM (Bill of Materials) in the manual

EPROM & SD Card Software

JAIR-BOM.xlsx

10-PIN Header to Serial 9-PIN "D" Connector
or
10-PIN Header to Serial 9-PIN "D" Connector


JAIR 8080A CPU Board on S100Computers.com

The JAIR is an all-in-one board needed to be a stand alone Altair 8800 computer



Altair 8800c Cabinet
Contact: Mike Douglas = deramp5113 yahoo com

Buy from deramp.com/altair_8800c



3D Printer Male 9-PIN "D" Adapter .STL
Yellow and Green
3D Printer Female 9-PIN "D" Adapter .STL
Blue and Red





Altair 8800c Front Panel Boards
Contact: Mike Douglas = deramp5113 yahoo com

The 8800c Front Panel board set is sold as two bare boards only

50 PIN Ribbon Cable from Front Panel to Interface Board

Altair 8800c Front Panel BOM.xlsx




- Time to Play and Learn Some of the Popular Software -

The Lost 1975 Altair Software Library
The Lost 1975 Altair Software Library



Some of this translates to any Altair 8800 or S-100 Computer
Getting Started with the Altair-Duino Pro



- Altair Software from other websites -

deramp.com/downloads/altair/software

vintage-basic.net



Got a link to share with everybody? Please email it to me: wperko@brainless.org




Still Too Bored?
Replica Boards Moving Closer to an Original Altair 8800



MITS Reproduction 8080 CPU Board
Contact: Gary Kaufman = gkaufman the-planet org

http://the-planet.org/

MITS Altair 8800 CPU Manual .PDF

1975 MITS Altair 8800 CPU BOM

Scanned Image of Original MITS Altair 8800 CPU Parts List circa19750207

8-PIN CPU to Front Panel Connector



88-2SIOJP Dual Serial Port Board
Contact: Martin Eberhard = mfeberhard gmail com

https://deramp.com/2SIOJP.html


SetUp for primary Altair 8800 serial ports A (Console) and B (External I/O)


Two serial ports compatible with the MITS 88-2SIO

One 2716 or 2732 EPROM, or 2816A EEPROM socket

Automatic EPROM disable allows full 64K-bytes of RAM

Power-on/reset jump start

Improved power-on clear circuit, eliminates Reset switch toggles

Support for S-100 systems without front panels

Support for Z-80 CPU's

Notes Getting to Know How to Use the AMON Program



FDC+ Enhanced Floppy Disk Controller
https://deramp.com/fdc_plus.html

Buy from deramp FDC+

FDC+ is an enhanced version of the original MITS 8" floppy disk controller

100% compatible drop-in replacement for the original two-board Altair FDC

FDC+ includes up to 64K of RAM and 8K of PROM that can be separately enabled

RAM can be enabled in 1K increments

PROM can be enabled in 256 byte increments

Minidisk controller compatable

Shugart SA-800 (or equivalent) drives compatable

5.25" Shugart SA-400 (or equivalent) drives compatible

Hard and Soft Sectored Media Support

96 TPI, High-Density 5.25" Drive compatiblity like Teac 55-GFR

FDC+ includes built-in, high speed serial port that can connect to a PC running a serial disk server

FDC+ Manuals, Software and Related Resources

Notes Connecting and Using the FDC+ Serial Drive Server Windows Program




Moving towards the five board Altair 8800 System B


Processor Technology CUTS board



Processor Technology GPM board
I'm looking for one or a suitable replacment.



Processor Technology 3P+S board
I'm looking for one of these too. data



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