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15AF: 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.
Input
Output
CHANINFO 15AF DEFW PRINT_OUT Keyboard.
15B1 DEFW KEY_INPUT
15B3 DEFB "K"
15B4 DEFW PRINT_OUT Screen.
15B6 DEFW REPORT_J
15B8 DEFB "S"
15B9 DEFW ADD_CHAR Work space.
15BB DEFW REPORT_J
15BD DEFB "R"
15BE DEFW PRINT_OUT Printer.
15C0 DEFW REPORT_J
15C2 DEFB "P"
15C3 DEFB $80 End marker.
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