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⌂ ∞ ▽ Elite on the 6502

Dashboard: ECBLB

[Elite-A, Parasite]

       Name: ECBLB                                                   [Show more]
       Type: Subroutine
   Category: Dashboard
    Summary: Light up the E.C.M. indicator bulb ("E") on the dashboard by
             sending a draw_E command to the I/O processor

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * ECMOF calls ECBLB




.ECBLB

 LDA #&93               \ Send command &93 to the I/O processor:
 JMP tube_write         \
                        \   draw_E()
                        \
                        \ which will toggle the E.C.M. indicator bulb ("E") on
                        \ the dashboard and return from the subroutine using a
                        \ tail call