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GXT150M

194-148 IBM POWER GXT150M GRAPHICS ADAPTER (PDF)

13W3 to HD15 Adapter

GXT150M - HD15 Connector
GXT150M - 13W3 Connector
SW Settings
AIX 3.2.5 Install

GXT150M - HD15 Connector

CARD ASM P/N 40G1728 (photos from okqubit.net)

U27-30 39G8754 (solder side - reverse of U13-16 for a total of 8)

This is possibly a prototype of the GXT150M adapter. Most notable differences:

• J1 is not populated; pads only
• J2 is a regular HD15 connector, instead of a 13W3
• SW DIP switch is completely missing (no pads)
• U34 ROM is completely missing (no pads)
• U13-16,27-30 are different P/N

GXT150M - 13W3 Connector

1-E: FRU P/N 93H1527, P/N 84G8685

U27-30 93G9842 (solder side - reverse of U13-16 for a total of 8; 1-E only?)

SW Settings

The DIP switch (SW) affects refresh rate (vertical frequency).

Interlaced display modes are not supported by these graphics adapters.

AIX 3.2.5 Funnies

Don Ramm wrote:
   The APAR required for the GXT150M is IX42626, so that's where the 42626 came from. However, the PTF number you should look to see if it is installed on your system is U439284. I got that from looking up IX42626 on IBMLink.

Steve Meyer wrote:
   Does anyone know exactly what PTFs are needed to get the GXT150M card to work? We just a new machine in with this card and our standard AIX clone doesn't seem to have the drivers for this card...

I remember wasting more than a week on this one when GXT150Ms had just come out. PTFs won't do it. There's an actual operating system (bos) component you need that shows up now in my system as:
nep.ddx 01.01.02.00  COMMITTED  GXT150M Graphics Adapter DDX
nep.mcx 01.01.02.00   COMMITTED  GXT150M MC/X Extension
nep.vdd 01.01.02.00   COMMITTED  GXT150M Graphics Adapter VDD

As I recall, this code has been on shipments of AIX 3.2.5 since Aug 94, but good luck on finding out WHICH shipments...

Ed Ravin got it to pop:
   I just got X working on a 39H with a GXT150M. First, I installed U439284, then I installed the "nep" drivers (the GXT 150M support files, they can't be installed until you've first installed U439284), then, when it still didn't work, I got the bright idea that maybe the card needs a little initialization at bootup. So I rebooted (with a power off just to make sure -- you never know, especially with IBM), and X came up just fine after that.

"nep" should be on the tape or CD that came with your system -- I found mine on an AIX 3.2.5 bootable CD, but I think I saw it on some of the install tapes too.

Note: The GXT150M, codenamed Neptune, appears in lsdev as nep0.