Type 8570 FRU P/N 92F0436 MKT P/N xxxxxxx
Type 8580 FRU P/N 92F0437 MKT P/N xxxxxxx
The IBM PS/2 486DX33 Processor Upgrade for Models 70 and 80 is an i486 accelerator for
16 MHz and 20 MHz 80386-based computers.
(Type 8570 "short" and "long" board version)
(Type 8580 Model 041 071 111 121 311 321 081 and 161 - 16 MHZ or 20 MHz only)
You must use 8570/80 Reference Diskette Version 1.10 or later.
Important In some cases, with the Processor Upgrade installed, the diagnostic tests
for some Micro Channel adapters might indicate that the adapter is failing when the adapter actually
operates correctly. If you experience this problem, do the following:
Set SW-1 on the Processor Upgrade to OFF (SW-1 OFF = cache disable for testing purposes !)
If you hear ONE-long and TWO-short beeps when the computer starts, then this is normal if there is
an 8514/A adapter installed.
The Upgrade Option package contains:
Switch function
1 ON (default) Cache on
Installing the Processor Upgrade
Utilities on the Upgrade Option Diskette
To control the cache speed under DOS (but not a DOS session under OS/2)
without restarting the computer, insert the Option Diskette in drive A and at
the prompt:
Please see the LEGAL - Trademark notice.
Switch Bank 1
SW-1
SW-2
SW-3
SW-4
SW-5
SW-6
SW-7
SW-8
ON
ON
Off
ON
ON
ON
ON
Off
OFF Cache off
2 ON (default) Cache HIMEM enabled
OFF Do not flush cache on INT 9
3 ON Cache enabled C000-D000
OFF (default) Cache disabled C000-D000
4 ON (default) Cache system BIOS enabled
OFF Cache system BIOS disabled
5 ON (default) do not change
OFF Not applicable
6 ON (default) XGA video adapter (slows processor speed)
OFF No XGA present
7 ON (default) cache all extended memory
OFF Disable cache above 14MB
8 ON Delay write cycles
OFF (default) fast write cycles
Some known Problems
--- or ---
Type fast to enable the cache.
The application program might be speed sensitive. Refer to the application program manual for information on speed
(memory caching) requirements. See also in above Switch-table "Memory caching" above.
Is an 80387 Coprocessor installed ? If yes then remove the Coprocessor and
install the Coprocessor compatibility plug.
Check the CONFIG.SYS file for a line
device=C:\windows\smartdrv.sys 2048 1024
and change it to the following:
device=C:\windows\smartdrv.sys 2048 1024 \b-
This problem occurs only with the version of Smartdrive supplied with Windows V-3.0 and DOS V-5.0.
The Smartdrive supplied with Windows V-3.1 does not have this problem, nor does it use the same syntax
(enabling/disabling double buffering).
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