Appendix C
PC Statements and Refresh Timing
117
ON PC GOSUB
After the ON PC GOSUB statement is executed, the PC’s categorized number allocation is written in. When the
Write flag is set, the GOSUB statement is executed. Only when the WRITE flag is set will the ON PC GOSUB
statement be executed.
I/O Refresh
I/O Refresh
I/O Refresh
Instruction Execution
Instruction Execution
Instruction Execution
ASCII Unit
C500 CPU
I/O Refresh
ON PC GOSUB Statement Execution
ON PC GOSUB Statement Execution
Categorized Number Al-
location (word n bit 04
to 07)
WRITE Flag (word n bit 01)
ASCII Unit (word n+3 bit 00)
PC ON
After the ON PC GOSUB statement is executed, the PC’s categorized number allocation is written in. When the
Write flag is set, the GOSUB statement is executed. Only when the WRITE flag is set will the ON PC GOSUB
statement be executed.
I/O Refresh
I/O Refresh
I/O Refresh
Instruction Execution
Instruction Execution
Instruction Execution
ASCII Unit
C500 CPU
I/O Refresh
PC ON Statement Execution
PC ON Statement Execution
Categorized Number Al-
location (word n bit 04
to 07)
WRITE Flag (word n bit 01)
ASCII Unit (word n+3 bit 00)
Содержание C500-ASC04
Страница 1: ...C500 ASC04 ASCII Unit Operation Manual Revised February 2001 ...
Страница 5: ...iv ...
Страница 7: ...vi ...