HARD and SOFT - a procedure that allows the absence of instruments to determine the duration of the signal INT.

(C) Igor Pichugin


   There is a procedure that allows the absence of instruments 
with sufficient precision to determine the signal duration INT

microprocessor. It is convenient to use when setting up
computer.

ORG30000
ENT
LDHL, # 8000
LDDE, # 8001
LDA, D
LDI, A
INCA
LD (HL), A
LDBC, 260
LDIR
LDHL, # 0CFB
LD (# 8181), HL
LDA, # C9
LD (# 8183), A
LDBC, # 10E0
DI
IM2
EI
L1HALT
DJNZL1
DI
LDA, C
CALL11560
LDA, 2
CALL # 1601
CALL11747
LDA, # 3F
LDI, A
IM1
EI
RET


   The verification result is displayed on the screen. If the 
value calculated by the program is zero, there is no reason for

anxiety. If it is greater than zero, it is necessary to choose
capacitance of the RC-circuit.