Ardent Tool of Capitalism

8556/57 Cached Processor Upgrade

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rf855657.exe 8556/8557 reference diskette v2.10 -supports SLC2/SLC3 upgrades

8556/57 Diags Disk Ver 2.04 or better supports all 8556/57 386SX / SLC systems, including 8556/57 systems with processor options: 386SLC, 486SLC2, and 486SLC3.

8556/57 Cached Processor Upgrade FRU 92F0078

Note the unpopulated jumper "BYPASS JUMPER".

Not having one in-hand, I see the wires from the OS1 outline, going under the heatsink.

Upgrade Installation

Highlights

• IBM 386SLC-20 with Internal memory cache controller and 8KB cache memory
• Improves processor throughput up to 88% depending on application
• Installs into a math co-processor 121-pin socket connector
• Provides a socket for 80387SX 20MHz or equivalent math co-pro.