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Elite on the BBC Micro

Text: POSWRCH [6502SP version, I/O processor]

Name: POSWRCH [Show more] Type: Subroutine Category: Text Summary: Print a character on the printer only
Context: See this subroutine in context in the source code References: This subroutine is called as follows: * prilf calls POSWRCH * printer calls POSWRCH * tosend calls POSWRCH

Arguments: A The character to send to the printer
.POSWRCH PHA \ Store A on the stack so we can retrieve it after the \ following call to NVOSWRCH LDA #1 \ Send ASCII 1 to the printer using the non-vectored JSR NVOSWRCH \ OSWRCH, which means "send the next character to the \ printer only" PLA \ Retrieve A from the stack JMP NVOSWRCH \ Send the character in A to the printer using the \ non-vectored OSWRCH, which prints the character on the \ printer, and return from the subroutine using a tail \ call