Sharp MZ-800 Technical Reference And User's Guide

1 Character generator (C.G.)
1-1 How to modify C.G. ROM
We will explain here the FONT address in the character generator ROM. The
display code corresponding to the character is referenced from the display
code table, and multiplied by eight. The result after adding lOOOH becomes
the address
in the ROM where the FONT is stored. When the target character
is in the display code table (second 2K-byte half), that display code is
multiplied by eight and 1800H is added.
(Example)
The display code for the "@" character is CFH.
Therefore,
CFH X 8 + lOOOH = 1678H
The address
of the FONT pattern is, therefore, 1678H.
Looking
at the character generator dump list
we see:
C.G. address DATA FONT
1678H
1679H
167AH
167BH
167CH
167DH
167EH
167FH
3CH
42H
81H
A5H
81H
99H
42H
3CH
'
LSD
f
MSD
45

Sharp MZ-800 Specifications

General

Brand	Sharp
Model	MZ-800
Category	Desktop
Language	English