Tandy 1000 Programmer's Reference Manual page 140

Chapter 1
I
System Calls
aux-input
m a c r o
mov ah,3
int 21 H
endm
aux-output macro character
mov d1,character
m o v
a h , 4
int 21 H
endm
print-char macro
character
mov d1,character
mov ah,5
int 21 H
endm
dir-console-iomacro switch
mov
d l
,switch
mov
ah,6
int 21 H
endm
dir-console-input
macro
mov a h , 7
int
21
H
endm
read-kbdmacro
mov ah,8
int 21 H
endm
displaymacro string
mov dx,offiet string
mov ah ,9
int 21 H
endm
get-string macro limit,string
mov dx,offsetstring
mov 5tring,limit
mov ah,0AH
int
21H
endm
check-kbd-status
macro
mov ah,0BH
int 21 H
endm
flush-and-read-kbd macro switch
mov a1,switch
mov ah,0CH
int
21
H
endm
;AUX-INPUT
;function03H
;AUX-OUTPUT
:function 04H
;PRINT-CHAR
;function 05H
;DIR-CONSOLE-IO
; f u n c t i o n K H
;DIR-CONSOLE-INPUT
;function 07H
;READ-KED
;function 08H
;DISPLAY
:function 09H
;GET-STRING
;function 0AH
;CHECK-KED-STATUS
:functionBBH
;FLUSH-AND-READ-KBD
;function 0 C H
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