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MP/M User's Guide 0073 0074 0075 0076 0077 0078 19 5e 23 56 eb e9 dad d mov e,m inx h mov d,m xchg pc hl ; add table index * 2 to tbl b ; get handler address ; jump to computed cns handler ascii character equates 007f = 0020 = rubout space equ equ 7fh 20h ; serial i/o port address equates 00f6 OOf7 OOf4 OOf5 00fa 00fb = = = = = = dataO stso datal stsl lptport lptsts equ equ equ equ equ equ Of6h dataO+l Of4h datal+l Ofah lptport+l ; poll console #0 input polcio: ptost: 0079 007b 007d 007e 0080 dbf7 e602 c8 3eff C9 in ani rz mvi ret ;return Offh if ready, ;000h if not stso 2 a,Offh ;console #0 input 0081 0083 0085 0088 008a 008c pt0in: Oe83 le04 cdfaff dbf6 e67f c9 mvi mvi call in ani ret ;return character in reg a C,poll e,plciO xdos ; poll console #0 inpu dataO ; read character 7fh ; strip parity bit ;console #0 output pt0out: 008d 008f 0091 0094 0095 0098 dbf7 e601 c29900 c5 cd9dOO cl coOrdy: ;req c = character to output in ani jnz push call POP stso Olh coOrdy b ptOwait b ;poll console #0 outp 134 (All Information Herein is Proprietary to Digital Research.)
