Radio Shack TRS-80 Model 100 - Lesson 4: Sales Commissions; Basic Sales Commissions

i. Basic
Input
Modt
a
\
n
X
_y\_
b.
B»»ic
Output
Mod*
m
"\
-/
OATA
BUS
TIMING IS
SHOWN IN FIQUMI 7.
Fig.
12
Basic I/O
Timing
--
—
-
X i f"
X
LOAD
COUNT!»
FROM
«.»
I
1
I
TwrrBOT
ISOUAftf
WAV!
I
NOTE
1
THt
TIMf «
OUTFUT
IS 1
1
MOOIC IF IN AN AUTOMATIC
ftCLOAO
OOOJ
IM,
MOO* SIT
-
II
V7
Fig 13
Timer
output
Waveform
Countdown
from
5
to 1