Data
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05551: THE 'INITIAL CHANNEL INFORMATION'
Used by the routine at NEW, which copies the information from here to CHINFO.
Initially there are four channels - 'K', 'S', 'R', and 'P' - for communicating with the 'keyboard', 'screen', 'work space' and 'printer'. For each channel the output routine address comes before the input routine address and the channel's code.
CHANINFO 05551 DEFW PRINT_OUT Keyboard.
05553 DEFW KEY_INPUT
05555 DEFB "K"
05556 DEFW PRINT_OUT Screen.
05558 DEFW REPORT_J
05560 DEFB "S"
05561 DEFW ADD_CHAR Work space.
05563 DEFW REPORT_J
05565 DEFB "R"
05566 DEFW PRINT_OUT Printer.
05568 DEFW REPORT_J
05570 DEFB "P"
05571 DEFB 128 End marker.
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