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Commit | Line | Data |
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6a4e9540 L |
1 | page 255\r |
2 | .z80\r | |
e4c4b148 | 3 | \r |
6a4e9540 L |
4 | ;\r |
5 | ; FIFO channels for communication with avr\r | |
6 | ;\r | |
30d1329e | 7 | global ff.init,ff.in,ff.out,ff.i.st,ff.o.st\r |
6a4e9540 L |
8 | \r |
9 | extrn buf.init\r | |
10 | \r | |
11 | include config.inc\r | |
64cc2207 | 12 | if CPU_Z180\r |
6a4e9540 | 13 | include z180reg.inc\r |
64cc2207 | 14 | endif\r |
6a4e9540 L |
15 | \r |
16 | \r | |
17 | ;--------------------------------------------------------------\r | |
18 | \r | |
19 | dseg\r | |
6a4e9540 | 20 | \r |
e4c4b148 L |
21 | \r |
22 | mkbuf co.fifo_id, co.fifo, co.fifo_len\r | |
23 | mkbuf ci.fifo_id, ci.fifo, ci.fifo_len\r | |
6a4e9540 L |
24 | \r |
25 | \r | |
26 | ;--------------------------------------------------------------\r | |
27 | \r | |
28 | cseg\r | |
29 | \r | |
30 | ; Init Serial I/O for console input and output\r | |
31 | ;\r | |
32 | \r | |
33 | ff.init:\r | |
34 | ld ix,ci.fifo\r | |
35 | ld a,ci.fifo.mask\r | |
36 | call buf.init\r | |
37 | ld ix,co.fifo\r | |
38 | ld a,co.fifo.mask\r | |
39 | jp buf.init\r | |
40 | \r | |
41 | \r | |
42 | ff.i.st:\r | |
43 | push ix\r | |
44 | ld ix,ci.fifo ;\r | |
45 | \r | |
46 | buf.empty:\r | |
47 | ld a,(ix+o.in_idx) ;\r | |
48 | sub (ix+o.out_idx) ;\r | |
49 | pop ix\r | |
50 | ret z\r | |
51 | or 0ffh\r | |
52 | ret\r | |
e4c4b148 | 53 | \r |
6a4e9540 L |
54 | \r |
55 | ff.in:\r | |
56 | push ix\r | |
57 | ld ix,ci.fifo ;\r | |
58 | \r | |
59 | buf.get:\r | |
60 | ld a,(ix+o.out_idx) ;\r | |
61 | bg.wait:\r | |
62 | cp (ix+o.in_idx) ;\r | |
63 | jr z,bg.wait\r | |
64 | \r | |
65 | push hl ;\r | |
66 | push ix\r | |
67 | pop hl\r | |
68 | add a,l\r | |
69 | ld l,a\r | |
70 | jr nc,bg.nc\r | |
71 | inc h\r | |
72 | bg.nc:\r | |
73 | ld l,(hl)\r | |
e4c4b148 | 74 | \r |
6a4e9540 L |
75 | ld a,(ix+o.out_idx) ;\r |
76 | inc a\r | |
77 | and (ix+o.mask)\r | |
78 | ld (ix+o.out_idx),a\r | |
e4c4b148 | 79 | \r |
6a4e9540 L |
80 | ld a,l\r |
81 | pop hl\r | |
82 | pop ix\r | |
83 | ret\r | |
84 | \r | |
85 | \r | |
86 | ff.o.st:\r | |
87 | push ix\r | |
88 | ld ix,co.fifo ;\r | |
89 | \r | |
90 | buf.full:\r | |
91 | ld a,(ix+o.in_idx) ;\r | |
92 | inc a\r | |
93 | and (ix+o.mask)\r | |
94 | sub (ix+o.out_idx) ;\r | |
95 | pop ix\r | |
96 | ret z\r | |
97 | or 0ffh\r | |
98 | ret\r | |
99 | \r | |
100 | \r | |
64cc2207 | 101 | if 1\r |
6a4e9540 | 102 | ff.out:\r |
64cc2207 L |
103 | push ix ;15\r |
104 | ld ix,co.fifo ;14\r | |
6a4e9540 L |
105 | \r |
106 | buf.put:\r | |
64cc2207 L |
107 | push hl ;11\r |
108 | push bc ;11\r | |
109 | push ix ;15\r | |
110 | pop hl ;10\r | |
111 | ld a,c ;4\r | |
112 | ld c,(ix+o.in_idx) ;19\r | |
113 | ld b,0 ;7\r | |
114 | add hl,bc ;11\r | |
115 | ld (hl),a ;7\r | |
116 | ld b,a ;4\r | |
117 | \r | |
118 | ld a,c ;4\r | |
119 | inc a ;4\r | |
120 | and (ix+o.mask) ;19\r | |
6a4e9540 | 121 | bp.wait:\r |
64cc2207 L |
122 | cp (ix+o.out_idx) ;19\r |
123 | jr z,bp.wait ;12/7\r | |
124 | ld (ix+o.in_idx),a ;19\r | |
e4c4b148 | 125 | \r |
64cc2207 L |
126 | out (AVRINT6),a ;11\r |
127 | ld a,b ;4\r | |
128 | pop bc ;10\r | |
129 | pop hl ;10\r | |
130 | pop ix ;14\r | |
131 | ret ;10\r | |
132 | \r | |
133 | else\r | |
134 | \r | |
135 | ff.out:\r | |
136 | push ix ;15\r | |
137 | ld ix,co.fifo ;14\r | |
138 | \r | |
139 | buf.put:\r | |
140 | push hl ;11\r | |
141 | push ix ;15\r | |
142 | pop hl ;10\r | |
143 | ld a,(ix+o.in_idx) ;19\r | |
144 | add a,l ;4\r | |
145 | ld l,a ;4\r | |
146 | jr nc,bp.1 ;12/7\r | |
147 | inc l ;4\r | |
148 | ld (hl),c ;7\r | |
149 | ld a,(ix+o.in_idx) ;19\r | |
150 | inc a ;4\r | |
151 | and (ix+o.mask) ;19\r | |
152 | bp.wait:\r | |
153 | cp (ix+o.out_idx) ;19\r | |
154 | jr z,bp.wait ;12/7\r | |
155 | ld (ix+o.in_idx),a ;19\r | |
156 | \r | |
157 | out (AVRINT6),a ;11\r | |
158 | ld a,c ;4\r | |
159 | pop hl ;10\r | |
160 | pop ix ;14\r | |
161 | ret ;10 |\r | |
162 | \r | |
163 | endif\r | |
6a4e9540 L |
164 | \r |
165 | end\r |