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Appendix C
PC Statements and Refresh Timing
Instructions and Refresh Timing
Data transfer between the ASCII Unit and the PC is executed during PC I/O refresh.
I/O Refresh
Cycle Time
I/O Refresh
Instruction Execution
Instruction Execution
Data Transfer
Data Transfer
Processing in BASIC program
ASCII Unit
C500 CPU
BASIC Statements and PC Cycle Time
PC GET
The ASCII Unit takes in data obtained in the last PC I/O refresh before execution of PC GET.
I/O Refresh
I/O Refresh
ASCII Unit
C500 CPU
Instruction Execution
Instruction Execution
PC GET Statement
PC GET Statement
Data from before
PC PUT
The ASCII Unit transfers data during the first PC I/O refresh after execution of PC PUT.
PC PUT Statement
I/O Refresh
I/O Refresh
ASCII Unit
C500 CPU
Instruction Execution
Instruction Execution
PC PUT Statement
Data Transfer
Data Transfer
Summary of Contents for C500-ASC04
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