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Appendix C
PC Statements and Refresh Timing
123
PC OFF
After the ON PC GOSUB statement is executed, the PC’s interrupt number is written in. If the PC OFF state-
ment is subsequently executed, then even if the Write flag is set, the GOSUB statement will not be executed
and the ASCII busy flag will not be set.
I/O refresh
I/O refresh
I/O refresh
Instruction execution
Instruction execution
Instruction execution
ASCII Unit
C200H CPU
I/O refresh
ON PC GOSUB statement execution
ON PC GOSUB statement execution
Interrupt number
(word n bits 04 through 07)
WRITE flag (word n bit 01)
ASCII Unit (word n+3 bit 00)
Summary of Contents for SYSMAC C200H-ASC02
Page 1: ...Cat No W165 E1 04 ASCII Unit SYSMAC C200H ASC02 ...
Page 2: ...C200H ASC02 ASCII Unit Operation Manual Revised September 2002 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 7: ...TABLE OF CONTENTS viii Glossary 159 Index 163 Revision History 165 ...
Page 122: ...Appendix B Specifications 115 130 35 100 5 ...
Page 168: ...Cat No W165 E1 04 C200H ASC02 ASCII Unit OPERATION MANUAL ...