VGA Adapter /A

@EFFD.ADF "IBM VGA Adapter" (file date of 1988-11-04, size 102 bytes.)
   On the T0, T1, T2, and T3 refdisk. But it is not present on the T4 refdisk.

VGA Adapter /A Front
VGA Adapter /A, Back
ADF Sections

Searching ALETs and RETAIN tips gives no hits. Looking at possible systems shows no VGA Adapter /A. Yet here it is.


VGA Adapter /A Front P/N 33F4473, FRU 15F7932 (IBM/Epson)

OS1 25.1750 MHz Osc
OS2 28.3220 MHz Osc
J1 VGA connector (HD-15)
U1,6,7,10,12,14,15,18 NEC D41464L-10
U2 delay line?
U5 INMOS IMSG171-35 RAMDAC
U11 VGA controller ?

U1,6,7,10,12,14,15,18 NEC D41464L-10 64Kx4 DRAM, 256 KB total. Looks similar to the 8580 VGA memory.

VGA Adapter /A, Back


AdapterID 0effdh "IBM VGA Adapter" Sections

AdapterName "IBM VGA Adapter"
Numbytes 1
fixedresources pos[0]=0000000xb

And that is it. The ADF does not fill me up with confidence. I see no EPROM or Flash on the card, so my SWAG is this card sits on standard VGA addresses. pos[0] bit 0 is the CEN, so this ADF is sordid "so what?"

An astute observer could probably grok supported I/O and things from the populated traces on the edge connector. Is this an AVE card? I don't see any 16-bit BVE cards...


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