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Reference and Diagnostic Disks
Bermuda vs. Lacuna Riser Card If you think you can just drop a Lacuna into a Bermuda system, you are wrong. The riser cards have physically different edge contacts. Note the edge connectors. The 76i bus adapter support (individual FRU) is 61G2289. This FRU is for the bracket alone. Bermuda Riser
FRU 87F4833
Note the "BVE" like connector at the left (rear) of the riser. As Bermudas do not have on-board video, the riser needs a BVE slot. This riser has the spring clips just like the Lacuna riser. Lacuna RiserFRU 68G2706
BT1 CR2032 Battery
Upgrading planars You can upgrade any current PS/2 76/77 or PS/2 56/57 with the new PS/2 Planar Upgrade. You'll gain all the advantages of the new 76/77 i and s systems. Current 76/77 systems will perform up to 38% faster while keeping everything else intact. Devil's in the
Details
There are two broad classes of box designs that led to
the 9576 and 9577.
Taller box:
Of course, the 855X were 80386DX or 80386SLC, so they used a completely different system board. The 9576 and 9577 used the same system board (=Bermuda), one with SCSI built into the board (=Bermuda). The 9576i and 9577i (Lacuna system board) were made in two different clock speeds -- 25MHz and 33MHz. Their system board FRU part numbers were: 25MHz only: 95G9691 (not streaming transfer
capable)
A 957Xs is only a 957Xi with a modified Future Domain SCSI
card added to one of the adapter slots on the bus riser card, to handle
internal/external SCSI devices.
Parts Comparison:
9576 Bus adapter*
87F4833
9556 Bus adapter*
79F7210
8556 Bus adapter*
79F7210
9577i/s 5-slot bus riser assembly
68G2709
9577 Bus adapter riser
card 87F4836
9557 Bus adapter riser
card 41G3877
8557 Bus adapter riser
type 1 85F0056
So you see, it is important to know both the part number and clock speed limitation of the Lacuna-type board, and to have the correct bus riser card for the particular box/system board. In other words, you cannot really upgrade a 957X to a 957Xi/s without changing the riser card as well as the system board! HELP!
IBM 76 Security Cable Cover . Hmm, never seen one. 77 Control
Module Header Pinout
PCMCIA Adapter mounting I finally got around to installing the PCMCIA adapter in my 77s. The trick- mount the adapter on a 76/77 floppy tray. (Adapter MUST be in the stamped metal bay PN 64F1270) Remove the rail guides on the dive support stucture in the 77. (Catches are on the inner end) swap the guides to the other side and push them onto the mounting studs. Now turn the tray/adapter upside down and push it into the rails. Note that the two card ejection buttons are now on the left side of the adapter. Just happens to be the exact height to perfectly fit the bezel. 9576 Case Stand  This
is for all you long suffering (and unfortunately cpu starved) 9576 owners.
But cheer up, there is hope. I had a CPU stand from a PC350 laying around.
I looked at my 76. Looked at the hook arrangement on the stand. Tried it
a few ways. Click! Click!
Please note that the stand is attatched to the side of the system WITHOUT the power supply.
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