Specifications

63
EVENT COUNTING
The following BASIC program will:
SETS UP COUNTER 4 OF THE TIMER TO COUNT RISING EOGES OF THE OATA COMING
IN ON SRC1.
BASIC:
HEX
10
OUT(30)=200
CB Disarm Counter 4
20 OUT(30)=04
04 Set Data Pointer to Counter 4,
Counter Mode Register
30 OUT(28)=41
29 Set Counter Mode 4 to Count on Rising
Edge: Count Source:SRC1, Binary
40
OUT(28)=01
01
Count. Count Up.
50 OUT(28)=00
00 Set Load Register,
Counter 4. to
2ero
60
OUT(28)=00
00
70 OUT(30)=72
48
load Counter 4 with Load Register
80 OUT(30)=40
28 Arm Counter
gO
STOP
The following 8ASIC program will:
REAO THE VALUE IN TIMER 4 (TIMER 4 WILL BE COUNTING THE RISING EOGES
OF THE DATA COMING IN ON 5RC1)
BASIC:
200 OUT(30)=168
210 OUT(30)=20
220 A=IN(28)
230
8=IN(28)
240 C=B*256+A
250
PRINT C
260 GOTO 200
A8 Save Counter 4 in Hold Register
14 Set Data Pointer to Hold Register 4
Input
Lo and Hi byte of Hold Register 4
Compute Total
PRINT Value in Register
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