Op 12-11-2025 om 08:18 schreef Roger via Freedos-user:
I remember CSMWrap now, story ran last Spring.
BRING BACK THE BIOS! (TO UEFI SYSTEMS, THAT IS)
May 29, 2025 by Jenny List
I dabbled in Linux BIOS (AKA Coreboot) a long time ago and this
low-level or BIOS programming can be very tricky due to lack of
debugging interfaces.
Typically, you're likely going to desire using serial (eg. db5
port/cable) to another computer for receiving debugging messages via
terminal, as the computer will likely have little display while booting.
Another item, is a PCI BIOS post code card, in the event a hang, you'll
know where the hang-up is possibly.
Once figured-out the hang or hurdle, usually is quite stable and
extremely quick.
A wrapper for EFI/UEFI booting DOS/FreeDOS should be rather the easiest
and less code method for booting DOS/FreeDOS rather than a mass of code
for running Qemu. Granted, the later is already written.
Given time, I may spend some time on this.
Does this UEFI loader perform an exitfrombootservices() to UEFI firmware
once the firmware is loaded ?
Just wonder how SeaBIOS provides support to the underlying hardware with
the UEFI boot services. Does anybody know ?
Thanks,
Roderick Klein
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