[comp.lang.pascal] Address of upper part of font bitmaps

ts@chyde.uwasa.fi (Timo Salmi LASK) (07/12/89)

I am looking for the address of upper half of the ascii character
font bitmaps. Let me give the background. The ascii characters from
0 to 127 are bitmapped in eight byte blocks starting from the
address F000:FA6E Hex in a PC and from address F000:1A6E on an AT.
But where the heck is the upper part (128-255) of the character font
bitmap located? I know that in an EGA and VGA system the interrupt
10 Hex, service 11 Hex, subservice 30 Hex with bh = 4 should give
the address, but I would like to know it also in the case of a CGA.
I also know that CGA in itself only supports 0-127, but the upper
half of the font bitmap must be around somewhere, because the
ordinary text mode is able to use them.

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Prof. Timo Salmi                                (Site 128.214.12.3)
School of Business Studies, University of Vaasa, SF-65101, Finland
Internet: ts@chyde.uwasa.fi Funet: vakk::salmi Bitnet: salmi@finfun