At least some of these upgrades were made by Hypertec of Australia.
7080pu.exe 486DX33 Proc. Upgrade for 70/80 16/20Mhz
pbe01066.exe HyperRace Blue 70/80
193-312 Processor Upgrades For Models 70 and 80 (16 and 20MHz)
IBM PS/2 486DX33 Processor Upgrade Card (for Models 8570 8580) (txt)
Hypertec Software Archive (all files dead!)
486A - Model 70
486B - Model 80
Installing the Processor Upgrade
486A - Model 70 FRU P/N 92F0436
486B - Model 80 FRU P/N 92F0437
486/P70 (is this really from Hypertec?)
Remove 386/387. Install compatibility plug. Remove both M3 screws.
Note: If the M3 screws use washers, make sure you
don't drop the washers into the computer! Install 486/P70. Replace both screws
and any washers.
Compatibility Plug (fits in 387 Socket)
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.
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:
- Model 70 or Model 80 Processor Upgrade
- 132-Pin Socket Extender (only needed for 8570)
- Module-removal tool for extracting 80386 processor
- Option Diskette
- 70 486 or Model 80 486 Logo
- Co-processor compatibility plug (not included in FRU P/N 92F0436)
- Sheet of system labels
1 ON Cache on (default)
OFF Cache off
2 ON Cache HIMEM enabled (default)
OFF Do not flush cache on INT 9
3 ON Cache enabled C000-D000
OFF Cache disabled C000-D000 (default)
4 ON Cache system BIOS enabled (default)
OFF Cache system BIOS disabled
5 ON do not change (default)
OFF Not applicable
6 ON XGA video adapter (slows processor speed) (default) *
OFF No XGA present
7 ON cache all extended memory (default) **
OFF Disable cache above 14MB
8 ON Delay write cycles
OFF fast write cycles (default)
* - slows processor speed when system accesses XGA video.
Use if XGA software is speed sensitive. If you don't have XGA, set to OFF.
** - cache all extended memory. IF you have <14 MB AND you have
boards that require space at the top of extended memory, turn OFF.
Installing the Processor Upgrade
- Upgrade the Refdisk (V-1.10 or higher) with the Option diskette. (use COPY AN OPTION DISKETTE function)
- Power-OFF the computer
- Remove the Power-Cable
- Open/lift the Machine cover
- Remove HD(s) / Adapters
- Locate the Processor on the System Board (Pin 1)
- Remove the Processor (80386)
- Remove the Co-processor ((80387) if any is installed)
- If the machine is a 8570 and the processor is nearby the power supply fan then insert the 132-Pin socket extender (Pin-1 to Pin-1) into the 80386 socket.
- Install the Co-pro compatibility plug into the Co-pro socket. (be sure PIN-1 to PIN-1)
- Install the Processor Upgrade Board into the Processor socket (be sure PIN-1 to Pin-1)
- Reinstall all previously removed Cable/Adapter
- Reconnect the Power cord
- Power-ON the system
- Run Setup / Test
Cannot load Application Program
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"
Application Program Displays Damaged Data
Is an 80387 Coprocessor installed? If yes then remove the Coprocessor and
install the Coprocessor compatibility plug.
Cannot Load Windows 3.0 in Enhanced Mode
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
Note: Before running diagnostic tests, check that
the processor upgrade card is fully seated in the system board and that the
80486 processor is fully seated in the upgrade card.
- Power-off the computer.
- Insert the 70/80 Reference Diskette in drive A.
- Power-on the computer.
- Follow the instructions on the screen to test the processor upgrade. If the
tests cannot find a problem, replace the processor upgrade with an 80386
processor from a new system board (or the original 80386 processor, if
available). If the failure does not occur again, replace the processor upgrade
with a new one. If the failure does occur again, replace the system board, and
reinstall the original processor upgrade. If the failure occurs again after
replacing the system board, replace the processor upgrade also.
Note: Use the 80386 processor only to diagnose the
problem. If it came from the customer, be sure you return it to them. If the
processor came from a new system board that you brought with you, and the
system board is not the problem, reinstall the processor on the new system
board before you return it to stock. If the system board is the problem, return
the 80386 processor with the bad system board.