8570/80 - 486DLC2 Upgrade

486DLC2 System Board Upgrade P/N 71G2610 FRU 13H6701

This IS the "Blue Lighning" all FRU and PNs match.

   The Blue Lightning Processor replaces the 80386DX microprocessor on the system board and emulates the presence of the original 80386DX, so no special software is required. The Blue Lightning Processor Upgrade is fully compatible with operating systems that are capable of 
running on an 80486 microprocessor. (incl. OS/2 and DOS)
   It also supports bus mastering adapters, if they are present in the system. 

Important: Always run the DIAGNOSTIC TESTs with the Blue Lightning Processor Upgrade cache disabled. (BANK-1 SW-1 OFF = cache disable for testing purposes !) 

In some cases, with the Blue Lightning installed, the diagnostic tests might indicate an error. Try to replace the Upgrade board with the original 386DX. If the diags are OK the adapter is fully functional and will also work with the Blue Lightning Upgrade. 

This Processor update can be installed on one of the following computers.  8570, 8580 with 80386 Microprocessor. 

You must use 8570/80 Reference Diskette Version 1.10 or later. 

The 132-Pin PGA Socket Extender (only needed for 8580 mod. 111, 121, 311 or 321) 

Switch Bank 1 Default Switch settings
SW-1  SW-2  SW-3  SW-4
 ON   Off   Off   Off

Switch Bank 2 Default Switch settings
SW-1  SW-2  SW-3  SW-4  SW-5  SW-6
 ON   ON    ON    Off   ON    Off

Switch Bank 1 function 
SW #   Setting    Controls                    Remarks 
  1     ON (D)   Cache on at startup         Switch only read at Power-ON.
        Off      Cache off at startup
  2     ON       Flush cache on INT 9
        Off (D)  Don't flush cache on INT 9
  3     ON       Flush cache on INT 10d
        Off (D)  Don't flush cache on INT 10d
  4     ON       Flush cache on INT 11d
        Off (D)  Don't flush cache on INT 11d

Switch Bank 2 function 
SW #   Setting    Controls                     Remarks 
  1     ON (D)   Flush cache on INT 14d
        Off      Don't flush cache on INT 14d
  2     ON (D)   Fast RAM count
        Off      Slow RAM count
      This switch caches ROM from adapters. This only affects the POST. If computer stops after RAM count completes, turn OFF and restart computer. The RAM count is slower, but performance after computer starts is not affected.
  3    ON (D)   Cache all extended memory
       Off      No caching from 14MB to 16MB
          Set to OFF if memory-mapped devices use memory in 14-16Mb region.
  4    Off (D) (Reserved)                    Do not change this switch
  5    ON (D)  (Reserved)                    Do not change this switch
  6    ON      Flush cache on INT 15d
       Off (D) Do not flush cache on INT 15d
        If you have a SCSI hard disk drive, switch must be ON.

Installing the Blue Lightning Upgrade 
   1. Power-OFF the computer 
   2. Remove the Power-Cable 
   3. Open/lift the Machine cover 
   4. Remove Hard Disk(s) / Adapters (so you can freely operate with the already installed CPU) 
   5. Locate the Processor on the System Board (Pin 1) 
   6. Remove the Processor (80386) 
   7. If machine is 8580 -111 121 311 or 321 use 132-Pin  PGA socket Extender (Pin1 to Pin1) 
   8. Install the Blue Lightning Board into Processor/PGA socket  (be sure PIN-1 to Pin-1) 
   9. If your machine have an SCSI Adapter, then on  Switch Bank 2 / SW-6 must be set to ON. 
  10. Reinstall all previously removed Cable/Adapter 
  11. Reconnect the Power cord 
  12. Power-ON the system 

Utility Diskette 
   To control the cache speed under OS/2 or DOS (but not a DOS session under OS/2) without restarting the computer, insert the Utility Diskette in drive A and at the prompt: 
   1. Type A: to change to the root directory of drive A. 
   2. Type slow to disable the Blue Lightning cache 
       --- or --- 
      Type fast to enable the Blue Lightning cache. 

To permanently affect caching options, use SW-1 on bank 1. 

Running Diagnostics on Blue Lightning
   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.

   1.Power-off the computer. 
   2.Insert the 70/80 Reference Diskette in drive A. 
   3.Power-on the computer. 
   4.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. 

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. 

Content created and/or collected by:
Louis Ohland, Peter Wendt, William Walsh, Kevin Bowling, Jim Shorney, Tim Clarke, David Beem, Tatsuo Sunagawa, Tomáš Slavotínek, and many others.

Ardent Tool of Capitalism - MAD Edition! is maintained by Tomáš Slavotínek.
Last update: 05 Mar 2021 - Changes & Credits | Legal Info & Contact