I'm not sure if this is what you are after below?. I have more information on this topic. Pentium 4 would use the CF2 device.
LARGE SYSTEMS - CPP / PENTIUM
1. Check FSUM in LD 32 to verify existing firmware version on MMDU
2. Split the Cores by issuing the "SPLIT" command from LD 135
3. Install the cdrom with the psdl.rec file in the cdrom drive on the active
core
4. Enter pdt
<ctrl>pdt
5. Verify that psdl file is on cdrom
( Note for CPP, floppy and cd drives are always device f0 and cd0 for
both CPU 0 and CPU 1 )
pdt> cd /cd0 , then type ll ( psdl file should be listed ).
6. Change the write protection on the MMDU with the following command
pdt> drUnprotectP
7. Change directory to where the psdl.rec file is located
pdt> cd /p/sl1
8. Backup the existing psdl.rec file in case it is needed again
pdt> cp psdl.rec psdl.old
9. Copy the psdl.rec file from the cdrom to the p/sl1 directory
pdt> cp /cd0/psdl_1.rec /p/sl1/psdl.rec
10. Change the MMDU back to read only
pdt> drProtectP
11. Initialize the active CPU
12. Check FSUM on LD 32 to verify new Firmware version on MMDU.
13. Install the cdrom with the psdl.rec file in the cdrom drive on the inactive
core
14. Repeat steps 3 through 10 for the inactive core ( other core )
15. Initialize the inactive CPU
16. From the active CPU issue the JOIN command in LD135 to restore
redundancy.
I hope it helps?.
All the best
Firebird Scrambler
Meridian Programmer in the UK
If it's working, then leave it alone!.