5250 Emulation Adapter/A

@ECFF.ADF IBM 5250 Emulation Adapter/A

5250_V2.zip DP5250.COM emulation program, BASIC files (zipped image)
5250_Remote_v201.zip Remote 5250 Emulation v2.01 (zipped image)

General Twinax Information

5250 Adapter
ADF Sections

Disk images and photos provided by David Beem. Thanks!


5250 Emulation Adapter/A P/N 69X6294, 69X6282 [P] [P]

There are no visible part IDs on the board. The IDs shown here are completely made up.

C1 large MLCC?
CN1 male DB-15 connector
M1-3 256Kx4 DRAM
RG µA7905C -5 V regulator
U1 7378945(ESD)
U3 93X2670 or 93X2655 (ESD)
U4 Intel N8259A-2 PIC
U5 8088-2-P (Siemens or AMD)
Y1 24.00000 MHz osc

M1-3 256Kx4 DRAM - Samsung KM44C256BJ-10 or TI TMS44C256DJ-12
U3 93X2670(ESD) (card P/N 69X6294?) or 93X2655(ESD) (card P/N 69X6282?)

The card is marked 93X2695 and another sticker says "To replace card order PN 69X6294" or "...69X6282".


From Fred Mau:
   15-pin *male* connector on the PC board? Almost has to be a 5250 Display Station Emulation Adapter (DSEA), It's the only cards Ive ever heard of that uses a 15-pin male. It allows a PC to act as a terminal on an AS/400 twinaxial network. There should also be a pigtail about 12" long with a twinaxial T connector on one end and 15-pin female on the other end that attaches to this card.
   My HMM shows the (early, for system 36/38) 5250 DSEA as being a 69X6294 or the (later, for AS/400) 5250 DSEA as being a 64G3506, but maybe there were some variants.


AdapterId ECFF IBM 5250 Emulation Adapter/A

Memory Address
   This allows you to choose the memory address for the adapter. Each adapter must have a unique address range.
  <"DC000-DDFFF">, C0000-C1FFF, C4000-C5FFF, C8000-C9FFF, CC000-CDFFF, D0000-D1FFF, D4000-D5FFF, D8000-D9FFF
;  DE000-DFFFF, C2000-C3FFF, C6000-C7FFF, CA000-CBFFF, D2000-D3FFF, D6000-D7FFF, DA000-DBFFF

I/O Address
   I/O address for adapter. Each adapter must have a unique address.
    <"01000-0107F" (01000-0107F)>, 01800-0187F, 02400-0247F, 02800-0287F, 05400-0547F, 0A400-0A47F, 0E000-0E07F, 0F800-0F87F

Interrupt Level
   Interrupt level for the adapter or disable the adapter from interrupting.
  Interrupts 9, 10, 11, 12 will be implemented in the future, at which time the comment marker will be removed. (Ed. Note that Disabled is commented out..)
  <"Interrupt 5>,6
  ;  9, 10, 11, 12, Disabled

Content created and/or collected by:
Louis Ohland, Peter Wendt, William Walsh, David Beem, Tatsuo Sunagawa, Jim Shorney, Tim Clarke, Kevin Bowling, Tomáš Slavotínek, and many others.

Ardent Tool of Capitalism - MAD Edition! is maintained by Tomáš Slavotínek.
Last update: 19 Nov 2021 - Changes & Credits | Legal Info & Contact