It's been a while since I posted a thread, "GRUB4DOS and IBM OS/2" on how to boot OS/2 Warp 4 with Grub4DOS more than two years ago and now I ran into a bit of trouble getting OS/2 Warp 4 to work from a second hard drive with Grub4DOS.
This procedure was done in Virtual PC 2007 under Windows 8.1, by the way.
In order to properly boot OS/2 Warp 4 off of a second hard disk, I had to enter the following information in my Grub4DOS MENU.LST file:
title IBM OS/2 Warp 4\n\n unhide (hd1,0) unhide (hd1,4) unhide (hd1,5) unhide (hd1,6) root (hd1,0) savedefault hide (hd0,0) hide (hd0,4) hide (hd0,5) hide (hd0,6) hide (hd2,0) hide (hd2,4) hide (hd2,5) hide (hd2,6) map (hd0) (hd1) map (hd1) (hd0) map --floppies=1 chainloader +1
When I first installed OS/2 Warp as a part of a DOS multi-booting routine, I had to boot from a floppy disk image to install the OS. FDISK from the original release of OS/2 Warp 4 will not properly support hard disks larger than 16,320 cylinders x 15 heads x 63 sectors per track for a total of 7,896,268,800 bytes (or 7,530 MB).
I managed to make up to four 1,883 MB FAT participants (one primary and three logical drives) prior to installing OS/2 Warp 4 as usual without any problems
Now, here's the hard part, when I applied FixPack 15 and rebooted this is what happened:
OS/2 Warp inside Virtual PC crashed with a TRAP 000E possibly referencing OS2KRNL after FixPack 15 is installed.
OS/2 Warp suffers a TRAP 000E referencing to OS2KRNL after FixPack 17 is installed.
The reason why this happened.
Looking into the CONFIG.SYS file, OS/2 Warp 4 with the IBM1S506.ADD base driver will only boot from the first hard disk, if hacks and workarounds such as hiding hard disk partitions and mapping the second or third hard disk as the primary is applied, OS/2 Warp 4 will throw a TRAP 000E error and halt.
In order to fix this issue, I had to replace the IBM1S506.ADD driver with Dani's DANIS506.ADD driver which will allow OS/2 to boot from a slave hard drive.
I simply had to replace line 49 of the CONFIG.SYS file
with this line
BASEDEV=DANIS506.ADD /A:0 /U:1 /!BM
And in line 86 of the CONFIG.SYS file I had to replace
with this line
You can get the replacement drivers at these following links:
Edited by ppgrainbow, 18 September 2017 - 08:47 AM.