ID Number: Q43272
5.00 5.10 6.00 6.00a 6.00ax 7.00
MS-DOS
Summary:
When a CGA graphics card is in any CGA graphics mode it does not
display ASCII characters greater than 127 when Microsoft C text-output
routines are used. Garbage characters are displayed instead.
This is expected behavior. The default character-definition table for
CGA graphics cards contains only the first 128 ASCII characters. To
print ASCII characters 128 to 255, a separate character-definition
table must be set up and accessed through Interrupt vector 1FH. The
MS-DOS utility GRAFTABL leaves such a table and hooks the Interrupt
1FH vector to point to it.
For more information, see Richard Wilton's book "Programmer's Guide to
PC & PS/2 Video Systems," page 269, which is available from Microsoft
Press.
Additional reference words: 6.00 6.00a 6.00ax quickc 2.00 2.01 2.50
2.51 7.00