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Loader: TestPro

[BBC Micro disc version, Sideways RAM Loader]

Name: TestPro [Show more] Type: Subroutine Category: Loader Summary: Test whether we are running this on a co-processor
Context: See this subroutine in context in the source code References: This subroutine is called as follows: * testpro% calls TestPro
.TestPro LDA #0 \ If this is a co-processor, then the DEC A instruction DEC A \ will be supported and will decrement A to &FF, but if \ this is not a co-processor, the DEC A instruction will \ have no effect STA proflag% \ Set proflag% to A, which will be &FF if this is a \ co-processor, 0 otherwise RTS \ Return from the subroutine