| | 1 | page 200\r |
| | 2 | \r |
| | 3 | ; Simple polling drivers for ASCI0 and ASCI1\r |
| | 4 | \r |
| | 5 | \r |
| | 6 | global as0init\r |
| | 7 | global as0ista,as0inp\r |
| | 8 | global as0osta,as0out\r |
| | 9 | global as1init\r |
| | 10 | global as1ista,as1inp\r |
| | 11 | global as1osta,as1out\r |
| | 12 | \r |
| | 13 | extrn as_init\r |
| | 14 | \r |
| | 15 | \r |
| | 16 | include config.inc\r |
| | 17 | include z180reg.inc\r |
| | 18 | \r |
| | 19 | dseg\r |
| | 20 | \r |
| | 21 | ;--------------------------------------------------------------\r |
| | 22 | ; Init Serial I/O for input and output (ASCI 0/1)\r |
| | 23 | ;\r |
| | 24 | ; b: device number\r |
| | 25 | ;\r |
| | 26 | \r |
| | 27 | \r |
| | 28 | as0init:\r |
| | 29 | ld c,0 ;asci channel number\r |
| | 30 | jp as_init\r |
| | 31 | \r |
| | 32 | as1init:\r |
| | 33 | ld c,1 ;asci channel number\r |
| | 34 | jp as_init\r |
| | 35 | \r |
| | 36 | \r |
| | 37 | ;--------------------------------------------------------------\r |
| | 38 | \r |
| | 39 | as0ista:\r |
| | 40 | in0 a,(stat0)\r |
| | 41 | and M_RDRF\r |
| | 42 | ret z\r |
| | 43 | or 0ffh\r |
| | 44 | ret\r |
| | 45 | \r |
| | 46 | as1ista:\r |
| | 47 | in0 a,(stat1)\r |
| | 48 | and M_RDRF\r |
| | 49 | ret z\r |
| | 50 | or 0ffh\r |
| | 51 | ret\r |
| | 52 | \r |
| | 53 | \r |
| | 54 | as0inp:\r |
| | 55 | in0 a,(stat0)\r |
| | 56 | bit RDRF,a\r |
| | 57 | jr z,as0inp\r |
| | 58 | \r |
| | 59 | in0 c,(rdr0)\r |
| | 60 | and a,M_OVRN+M_PERR+M_FE\r |
| | 61 | jr z,as0in_ex\r |
| | 62 | \r |
| | 63 | in0 a,(cntla0)\r |
| | 64 | res EFR,a\r |
| | 65 | out0 (cntla0),a\r |
| | 66 | as0in_ex:\r |
| | 67 | ld a,c\r |
| | 68 | ret\r |
| | 69 | \r |
| | 70 | as1inp:\r |
| | 71 | in0 a,(stat1)\r |
| | 72 | bit RDRF,a\r |
| | 73 | jr z,as1inp\r |
| | 74 | \r |
| | 75 | in0 c,(rdr1)\r |
| | 76 | and a,M_OVRN+M_PERR+M_FE\r |
| | 77 | jr z,as1in_ex\r |
| | 78 | \r |
| | 79 | in0 a,(cntla1)\r |
| | 80 | res EFR,a\r |
| | 81 | out0 (cntla1),a\r |
| | 82 | as1in_ex:\r |
| | 83 | ld a,c\r |
| | 84 | ret\r |
| | 85 | \r |
| | 86 | if 0\r |
| | 87 | in0 a,(stat1)\r |
| | 88 | rlca\r |
| | 89 | jr nc,as1inp\r |
| | 90 | in0 a,rdr1\r |
| | 91 | ret\r |
| | 92 | endif\r |
| | 93 | \r |
| | 94 | \r |
| | 95 | as0osta:\r |
| | 96 | in0 a,(stat0)\r |
| | 97 | and M_TDRE\r |
| | 98 | ret z\r |
| | 99 | or 0ffh\r |
| | 100 | ret\r |
| | 101 | \r |
| | 102 | as1osta:\r |
| | 103 | in0 a,(stat1)\r |
| | 104 | and M_TDRE\r |
| | 105 | ret z\r |
| | 106 | or 0ffh\r |
| | 107 | ret\r |
| | 108 | \r |
| | 109 | \r |
| | 110 | as0out:\r |
| | 111 | in0 a,(stat0)\r |
| | 112 | and M_TDRE\r |
| | 113 | jr z,as0out\r |
| | 114 | out0 (tdr0),c\r |
| | 115 | ld a,c\r |
| | 116 | ret\r |
| | 117 | \r |
| | 118 | as1out:\r |
| | 119 | in0 a,(stat1)\r |
| | 120 | and M_TDRE\r |
| | 121 | jr z,as1out\r |
| | 122 | out0 (tdr1),c\r |
| | 123 | ld a,c\r |
| | 124 | ret\r |
| | 125 | \r |
| | 126 | end\r |
projects / z180-stamp-cpm3.git / blame_incremental