Xref: utzoo comp.sys.ibm.pc:31403 comp.lang.pascal:2052
Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!sun-barr!cs.utexas.edu!uunet!mcvax!kth!draken!tut!ra!chyde!ts
From: ts@chyde.uwasa.fi (Timo Salmi LASK)
Newsgroups: comp.sys.ibm.pc,comp.lang.pascal
Subject: Address of upper part of font bitmaps
Message-ID: <635@chyde.uwasa.fi>
Date: 12 Jul 89 07:59:34 GMT
Reply-To: ts@chyde.uwasa.fi (Timo Salmi LASK)
Organization: U of Vaasa, Finland
Lines: 17

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.

...................................................................
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