My IMSAI-JAIR Computer

AltairReferenceCARD.pdf Created by Thomas Niccum 66 Various Books on BASIC 8080InstructionsQuickRef.zip

The IMSAI-JAIR 8800 Computer SetUp and Running

The Two Boards .

IMSAI-JAIR Insides ...

Front Panel Power ON & BOOT .

PC/TeraTerm .

2025 New Oak Cabinet .

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So you bought a cabinet for your computer Then got the other recommended boards & Power Supplies etc. .

9-Slot Backplane Manual No components needed other than the S-100 Edge Connectors a jumping the fuse points .

Search criteria "100 pin 2x50 S100 Bus Backplane Pitch Card Edge Connetors" or "card edge connector dual 100" EADC 346-100-520-202 or EADC 346-100-500-204 or EADC 346-100-520-802 or FUPH8010-100MTNE DigiKey.com or Mouser.com

The Mean-Well Power Supplies You need TWO: "RS-25-15" for +15V and -15V Digikey.com or Mouser.com or JameCo.com and ONE: "HRP-75-7.5" for +8V Digikey.com or Mouser.com or JameCo.com

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The Two Boards

Don Caprio mini-Front Panel . . . . . J6 = JUMPER ... J5 = JUMPER ... MWRT = JUMPER ... PROT = OPEN ... UPROT = OPEN & OPEN

Josh Bensadon J.A.I.R. 8080 CPU board . . . . . JP1 = 2-1 ... JP7 = 1-2 ... JP6 = 2-1 ... JP4 = 1-2 ... JP2 = 2-3 ... JP11 UPPER = 1-2, LOWER = 1-2 JP3 = OPEN ... JP8 = ALL JUMPERED JP9 = JUMPER, OPEN, OPEN, OPEN, OPEN, OPEN, OPEN, OPEN JP10 = OPEN, JUMPER, OPEN, OPEN, OPEN, OPEN, OPEN, OPEN ... JP12 = JUMPERED ... RESET = OPEN

Potomac Micro-Magic Modem Model MM-103 DIP Switch = 001111 Coupler Wiring ..... PIN 14 ..... PIN 13 ..... PIN 12 ..... PIN 11 ..... PIN 10 ..... PIN 9 ..... PIN 8 ..... PIN 14 ..... PIN 13 ..... RED ..... YELLOW ..... BLUE ..... GREY ..... PIN 8 ..... PIN 1 ..... PIN 2 ..... PIN 3 ..... PIN 4 ..... PIN 5 ..... PIN 7 ..... PIN 7 ..... PIN 1 ..... PIN 2 ..... BROWN ..... ORANGE ..... GREEN ..... VIOLET ..... PIN 7 .

IMSAI-JAIR Insides ...

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PC/TeraTerm

Connect Port A from the J.A.I.R. to the PC via a RS-232 to USB adapter cable Use the "Device Manager" to identify the COM port used by the RS-232 adapter cable . . . . .

Install and SetUp TeraTerm on your PC < Setup > - < Serial Port > - < Port: > . . . . . Enter the COM Port number from the Device Manger .

< Speed: > = 19200 ... like my MONITOR PROM set at 9600 BAUD . . . . . < Transmit delay > = 20 and 100 msec/line .

After "RUN"ing the BOOT starts making .... then a message . . . . . On the PC/TeraTerm display you will see .

Then RUN CBBS ...

Or BOOT to CP/M From here you can type DIR or LS to see the files on a drive .

The command line to run MBASIC and the GALAXY.BAS program on the D: drive . . . . .

Transmit delay = 10 and 200 msec/line

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Hand Coded Page by Walt Perko