Category: no classification
INT 15 ----------------
INT 15h - Arabic/Hebrew MS-DOS 5.0???+ - HGC & HGC/RAMFont support???
AX = 67C3h
CX = 1Bh
CS|DS???:SI -> buffer
Return: ES:DI -> ???
AX = ???
Program: The SK_HGC.COM TSR is used to support operation of ARABIC.COM/
HEBREW.COM with the Hercules Graphic Card series of video adapters.
It is provided for compatibility with ADOS 3.30/HDOS 3.30 only.
This file must be loaded immediately after ARABIC.COM/HEBREW.COM
to insure correct operation with these devices.
Notes: This call is made by the SK_HGC.COM TSR for HGC and HGC/RAMFont
graphics adapters when it has successfully detected an Arabic/Hebrew
issue of MS-DOS via INT15h/6700h/BX=FFFFh to ensure it runs on the
correct version of Arabic or Hebrew MS-DOS.
At some unknown offset in the buffer it contains a flag indicating
if a HGC or HGC/RAMFont adapter is present or not.
ARABIC/HEBREW does not operate with Monochrome Display Adapters (MDA)
and the Hercules Graphic Card Plus (HGC+). ARABIC/HEBREW does operate
with Hercules Graphic Card (HGC) with a burnt-in ROM/EPROM font (many
HGC cards, even the highly integrated ones, allow for this kind of
user customization), though this is not officially supported.
In some pre-1987 IBM XT/AT and compatibles, the Hercules Graphic
Card Plus operates like a MDA card. This hardware limitation
prevents ARABIC/HEBREW from running on this combination of hardware.