From Newsgroup: comp.sys.ibm.ps2.hardware

While performing my constant genuflections over Micro Channel, I noticed another Space Oddity.

MC3448A, Quad Bidirectional Instrumentation Bus GPIB Transceiver

Adaptec AIC-6250EL = NO MC3448A
84F8324 = MC3448A
Jalpa / Monarch = NO MC3448A

Sysboard implementations either used a DIP or 2x "SIP" terminators.

The 9585-X uses a 84F8324, but no images or components for terminators
on the outline. _MAYBE_


PS/55 Implementations ------------------------ //

https://www.ardent-tool.com/PS55/SCSI/

16-bit SCSI Adapters w/o Cache
Short SCSI A/16 (SIP Terminators)
Adaptec AIC-6250EL, SIP terms, MC3448A ??? [no rear image]

Short SCSI A/16 (DIP Terminator)
84F8324 SCSI bus controller, DIP term, MC3448A present [front]

2/3 Length SCSI/A (50-pin Header + Card Edge)
Adaptec AIC-6250EL, SIP terms, No MC3448A

32-bit SCSI Adapters w/ Cache
Short SCSI A/32 with Cache (SIP Terminators)
84F8324 SCSI bus controller, SIP terms, MC3448A present [back]

Short SCSI A/32 with Cache (DIP Terminator)
84F8324 SCSI bus controller, DIP term, MC3448A present [back]

2/3 Length SCSI with Cache (50-pin Header)
Adaptec AIC-6250EL, SIP terms, No MC3448A

Long SCSI A/32 with Cache and 2.5" HD
84F8324 SCSI bus controller, DIP term, MC3448A ??? [probable]

PS/2 SCSI Implementations ----------------- //

No Tribbles or AIC-6250EL have MC3448A...
Korvetten class use different auto-term components on rear.

I do NOT understand WHAT the MC3448A does...

SCSI w/ Cache - Newest [Three can]
84F8324 SCSI bus controller, DIP term, MC3448A present [back]

Bermuda
84F8324 SCSI bus controller, 2x SIP term [?], MC3448A present

9585-X
84F8324 SCSI bus controller, no images

8556
64F4760 SCSI ctrl. "Jalpa" (local bus), "Red" DIP term, No MC3448A

9556
91F9906 SCSI ctrl. "Monarch" (local bus), 2x SIP term [?], No MC3448A --- Synchronet 3.20a-Linux NewsLink 1.114