Commodore Amiga A500 Technical Reference Manual page 130

WRlTE TELETYPE (AH
=
OEH)
INPUT AL
=
CHARACTER TO BE WRITTEN
BL
=
FOREGROUND COLOR OF CHAR (USED ONLY
IN GRAPHICS MODE)
BH
=
REQUESTED DISPLAY PAGE (REALLY IS
IGNORED)
OUTPUT: None
READ CURRENT VIDEO STATE (AH
=
OFH)
INPUT: DS
=
ROM data segment
OUTPUT: AH
=
NUMBER OF SCREEN COLUMNS
AL
=
CURRENT VIDEO MODE
BH
=
ACTIVE DISPLAY PAGE
EQUIPMENT CHECK
OUTPUT: A X
=
Equipment
Flags
VIA
S/ W
INT
11
H
B I ~ \
ol
A L
>
Diag Mode
>
I . 80x7 installed
I
L
>
R A M size
l I
>
)
*
64KB
L
>
} Initial Video Mode
> ) 0:none. 1 :40
X
25 cga. 2:80
X
25 cga.
3:80
X
25 mga
I
1
> ) # o f
>
} diskette drives
-
I
Bil\ 01 A H .
>
) COM Pons
>
unuhed
I l l
I
>
I
:
Game Adaptor present
I I
>
unused
I
>
j ~m
ports
MEMORY SIZE CHECK VIA S / W INT 12H
OUTPUT: AX
=
Total Memory size in Kilobytes