Yes, I'm aware of the hardware differences, but were they significant enough to require software adjustments? I used both 8088 and 8086-based PCs in the second

Yes, I'm aware of the hardware differences, but were they significant enough to require software adjustments? I used both 8088 and 8086-based PCs in the second half of the eighties, and from a software perspective, they seemed identical. I assumed the same applied to BIOS code since, to the best of my recollection, software couldn't detect whether it was running on an 8088 or an 8086, even if it tried. By the way, while the PS/2 series marked IBM's first use of the 8086 in a PC (specifically the PS/2 Model 25), clones had been using the 8086 for some time already. The 8086 worked seamlessly with the standard ISA bus, and as far as I know, no 8086-based systems used the PS/2-specific Microchannel bus.