User guide

1
Installing and Configuring Enhanced OS-9
Enhanced OS-9 for X86 PCAT 137
VIDBIOS
The VIDBIOS utility shows how to use the INT10h trap handler. Users
may either use the VIDBIOS utility or incorporate the functionality in
their own programs by studying the code in
MWOS/OS9000/80386/PORTS/PCAT/UTILS/VIDBIOS.
The VIDBIOS utility allows setting specific video mode using INT10h on
video cards. Some video cards may not function correctly with the
VIDBIOS utility do to the protected nature of OS-9.
Usage
vidbios [<options>]
Function
Make 16-bit int10h video BIOS call
Options
One or more of the following options must be specified. Options default
to a value of zero if not specified.
-eax=0xhhhhhhhh value to load into eax for BIOS call
-ebx=0xhhhhhhhh value to load into ebx for BIOS call
-ecx=0xhhhhhhhh value to load into ecx for BIOS call
-edx=0xhhhhhhhh value to load into edx for BIOS call
-ebp=0xhhhhhhhh value to load into ebp for BIOS call
-esi=0xhhhhhhhh value to load into esi for BIOS call
-edi=0xhhhhhhhh value to load into edi for BIOS call
-r print register state after BIOS call