DE9-DB25 and 10mm Panel Mount Adapters
Keystone Electronics 7279 Slotted JACK SCREW HEX 4-40
https://pinshape.com/items/126417-3d-printed-de9-db25-panel-mount-adapters
Keystone Electronics 7232 JACK SCREW HEX 4-40
https://www.digikey.com/en/products/detail/keystone-electronics/7232/316674
https://www.digikey.com/en/products/detail/keystone-electronics/7279/2745925?s=N4IgTCBcDaIMwDYC0B2MKCcSByAREAugL5A
5t4nd1ng @ th3 3dg3 0f 5p3ct4t10n!
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![]() ![]() Getting an Altair 8800c Computer SetUp and Going |
![]() ![]() 66 Various Books on BASIC 8080InstructionsQuickRef.zip |
![]() ![]() Altair 8800c Hardware Assembly & BOOT to CP/M & MBASIC ... |
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![]() ![]() 2022 Prices: . . . |
![]() ![]() Reproduction MITS 88 CPU rev.1 board = $125 . . . Martin Eberhard 88-2SIOJP I/O board = $125 |
![]() ![]() Three Mean-Well Power Supplies = $80 . . . 9-Slot Backplane $26 |
![]() ![]() Miscellaneous Parts = $100 . . . SubTotal = $1,204 |
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![]() ![]() 2024 UpGrade. . . |
![]() ![]() ReAffirming the TDL ZPU w/a Z80 CPU . . . |
![]() ![]() TDL ZPU w/a Z80 CPU
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![]() ![]() Swapped out the 88-2SIOJP board for the newer 88-2SIO1A Serial I/O board . . . |
![]() ![]() 88-2SIO1A Prototype/Test Serial I/O board (88-2SIO1B Coming Soon) . . .
TOP Switch Port 0: ON ON ON ON for Serial I/O NO Flow Control
TOP Switch Port 1: OFF OFF OFF OFF for Serial I/O Flow Control
Port 0 VEC INT = ALL OFF
As you can see this board is addresses as; ![]()
DE9-DB25 and 10mm Panel Mount Adapters
Keystone Electronics 7279 Slotted JACK SCREW HEX 4-40
I'm using M3x35mm bolts to mount the assemblies to the Altair 8800c back panel.
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![]() ![]() Changed the FDC+ Serial Drive Server board Settings . . . |
![]() ![]() NEW FDC+ Serial Drive Server board Settings . . .
RAM Size: SW1 = OFF OFF OFF OFF OFF OFF OFF OFF
PROM AdressSW2 = ON ON ON ON ON OFF OFF OFF
Interrupt Select = SW4 = OFF OFF OFF OFF OFF OFF OFF OFF
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![]() ![]() Adding a DAZZLER II board . . . |
![]() ![]() The S100 Group DAZZLER II
Jumper K1 Bottom Two Shunted Jumper K4 Top two Shunted All other Jumpers are OPEN SW1 = OFF OFF OFF OFF OFF OFF OFF OFF SW3 = ON ON ON ON OFF OFF OFF OFF SW4 = ON ON ON ON ON OFF OFF OFF SW5 = ON ON ON ON ON ON ON ON SW6 = ON ON ON ON ON ON ON ON
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TOP Switch Port 0: ON ON ON ON for RS-232 Serial I/O NO Flow Control TOP Switch Port 1: ON ON ON ON for RS-232 Serial I/O NO Flow Control
Port 0 VEC INT = ALL OFF
As you can see this board is addresses as;
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Then got the other recommended boards & Power Supplies etc.
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EADC 346-100-520-202 or EADC 346-100-500-204 or EADC 346-100-520-802 or FUPH8010-100MTNE
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![]() ![]() The Mean-Well Power Supplies
You need TWO: "RS-25-15" for +15V and -15V
and ONE: "HRP-75-7.5" for +8V
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![]() ![]() DigiKey.com is one source for the power connectors WM2104-ND 0009503061 Molex CONN RCPT HSG 6POS 3.96MM |
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![]() ![]() Altair 8800c Basic Boards | |
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SW1 = 00011111 ... SW2= 11011100 ... SW3 = 00000000 ... SW4 = 000100000 ... SW5 = 000100000
J1 = 4-5 ... J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, J12, J13, J14, J15 = OPEN
J16 = 1-2 ... J17 = OPEN ... J18 = JUMPER, J19 = OPEN ... J20 = CC/8080
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SW3 = 00000111 ... SW1 = 00000000 ... SW2 = 01110000 ... SW4 = 00000000 ... J3 = OPEN
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![]() ![]() Inserting the Boards | ||
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![]() ![]() Run FDC+ Serial Drive Server |
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FDC+ Serial Drive Server
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Disk 0 = the CP/M or DOS BOOT .DSK file
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Disk 2 = Other Program FDD .DSK
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![]() ![]() Front Panel Power ON & BOOT | |||
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Address FF00 = PROM MONITOR on FDC+ board
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![]() ![]() PC/TeraTerm |
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Connect Port A from the 88-2SIOJP board to the PC via a RS-232 to USB adapter cable
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Install and SetUp TeraTerm on your PC
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< Speed: > = 9600
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![]() ![]() Useful CP/M & MBASIC NFO |
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SetUp LPRINT to Port B address 12h/13h or 18d/19d
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This simplifies sending $trings of Data to the Utility Port B
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The "LS" command provides a listing of the files on the selected disk drive
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IF you perform the LS command for each drive, then run the "STAT" program and then the "SURVEY" program
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A: R/W, Space: 7940k
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D: R/W, Space: 34k
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. . . . . . . . . . . . . . . *** System Survey (June 82) ***
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Drive B: 996K bytes in 159 files with 7188K bytes remaining
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BIOS at C403 iobyte 55 drive 00 BDOS at B606
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0 Bytes Empty 65535 Total Active Bytes
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08 0A 0B
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22 Ports active
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![]() ![]() Swapped out the MITS 8800 CPU board for a TDL ZPU board |
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TDL ZPU board ... slightly modified for maximum speed
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The TDL ZPU board allows the computer to handle 8080 and Z80 instructions
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![]() ![]() Another addition a VOTRAX SC-01A PAiA SS100 Speech Synthesizer board |
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Hand Coded Page by Walt Perko