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Elite on the BBC Micro

Screen mode: DET1 [Elite-A, Parasite]

Name: DET1 [Show more] Type: Subroutine Category: Screen mode Summary: Show or hide the dashboard (for when we die) by sending a write_crtc command to the I/O processor
Context: See this subroutine in context in the source code References: This subroutine is called as follows: * DEATH calls DET1

Arguments: X The number of text rows to display on the screen (24 will hide the dashboard, 31 will make it reappear)
.DET1 LDA #&95 \ Send command &95 to the I/O processor: JSR tube_write \ \ write_crtc(rows) \ \ which will update the screen to show the specified \ number of text rows TXA \ Send the parameter to the I/O processor: JMP tube_write \ \ * rows = X \ \ and return from the subroutine using a tail call