📄 lm78.inc
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;; LM78 Read/Write subrouting
;; Read_LM78_Reg
;; Input:
;; AL= Index Register
;; Output:
;; AL= Value
public read_lm78_reg
read_lm78_reg:
push cx
push dx
mov dx,295h
out dx,al
mov cx,8000h
loop $
inc dx
in al,dx
mov ch,80h
loop $
pop dx
pop cx
ret
;; Write_LM78_Reg
;; Input:
;; AL= Index Register
;; AH= Write to Register Value
;; Output:
;; None
public write_lm78_reg
write_lm78_reg:
push cx
push dx
mov dx,295h
out dx,al
mov cx,8000h
loop $
inc dx
xchg al,ah
out dx,al
mov ch,80h
loop $
xchg al,ah
pop dx
pop cx
ret
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