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Commit | Line | Data |
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6a4e9540 L |
1 | page 255\r |
2 | .z80\r | |
3 | \r | |
4 | global mrx.fifo,mtx.fifo\r | |
5 | \r | |
6 | global msginit,msgi.st,msg.in,msgo.st,msg.out\r | |
7 | global msg.sout\r | |
8 | \r | |
9 | extrn buf.init\r | |
10 | \r | |
11 | include config.inc\r | |
12 | include z180reg.inc\r | |
13 | \r | |
14 | ;--------------------------------------------------------------\r | |
15 | \r | |
16 | dseg\r | |
17 | \r | |
18 | mkbuf mrx.fifo,mrx.fifo_len\r | |
19 | mkbuf mtx.fifo,mtx.fifo_len\r | |
20 | \r | |
21 | ;--------------------------------------------------------------\r | |
22 | \r | |
23 | cseg\r | |
24 | \r | |
25 | ;\r | |
26 | ; Init buffer\r | |
27 | ;\r | |
28 | \r | |
29 | msginit:\r | |
30 | ld ix,mrx.fifo\r | |
31 | ld a,mrx.fifo.mask\r | |
32 | call buf.init\r | |
33 | ld ix,mtx.fifo\r | |
34 | ld a,mtx.fifo.mask\r | |
35 | jp buf.init\r | |
36 | \r | |
37 | ;--------------------------------------------------------------\r | |
38 | \r | |
39 | msgi.st:\r | |
40 | push ix\r | |
41 | ld ix,mrx.fifo ;\r | |
42 | \r | |
43 | buf.empty:\r | |
44 | ld a,(ix+o.in_idx) ;\r | |
45 | sub (ix+o.out_idx) ;\r | |
46 | pop ix\r | |
47 | ret z\r | |
48 | or 0ffh\r | |
49 | ret\r | |
50 | \r | |
51 | ;--------------------------------------------------------------\r | |
52 | \r | |
53 | msg.in:\r | |
54 | push ix\r | |
55 | ld ix,mrx.fifo ;\r | |
56 | \r | |
57 | buf.get:\r | |
58 | ld a,(ix+o.out_idx) ;\r | |
59 | bg.wait:\r | |
60 | cp (ix+o.in_idx) ;\r | |
61 | jr z,bg.wait\r | |
62 | \r | |
63 | push hl ;\r | |
64 | push ix\r | |
65 | pop hl\r | |
66 | add a,l\r | |
67 | ld l,a\r | |
68 | jr nc,bg.nc\r | |
69 | inc h\r | |
70 | bg.nc:\r | |
71 | ld l,(hl)\r | |
72 | \r | |
73 | ld a,(ix+o.out_idx) ;\r | |
74 | inc a\r | |
75 | and (ix+o.mask)\r | |
76 | ld (ix+o.out_idx),a\r | |
77 | \r | |
78 | ld a,l\r | |
79 | pop hl\r | |
80 | pop ix\r | |
81 | ret\r | |
82 | \r | |
83 | ;--------------------------------------------------------------\r | |
84 | \r | |
85 | msgo.st:\r | |
86 | push ix\r | |
87 | ld ix,mtx.fifo ;\r | |
88 | \r | |
89 | buf.full:\r | |
90 | ld a,(ix+o.in_idx) ;\r | |
91 | inc a\r | |
92 | and (ix+o.mask)\r | |
93 | sub (ix+o.out_idx) ;\r | |
94 | pop ix\r | |
95 | ret z\r | |
96 | or 0ffh\r | |
97 | ret\r | |
98 | \r | |
99 | ;--------------------------------------------------------------\r | |
100 | \r | |
101 | msg.out:\r | |
102 | push ix\r | |
103 | ld ix,mtx.fifo ;\r | |
104 | \r | |
105 | buf.put:\r | |
106 | push hl ;\r | |
107 | push bc\r | |
108 | push ix\r | |
109 | pop hl\r | |
110 | ld c,(ix+o.in_idx) ;\r | |
111 | ld b,0\r | |
112 | add hl,bc\r | |
113 | ld b,a\r | |
114 | \r | |
115 | ld a,c ;\r | |
116 | inc a\r | |
117 | and (ix+o.mask)\r | |
118 | bp.wait:\r | |
119 | cp (ix+o.out_idx) ;\r | |
120 | jr z,bp.wait\r | |
121 | ld (hl),b\r | |
122 | ld (ix+o.in_idx),a\r | |
123 | \r | |
124 | ld a,b\r | |
125 | out0 (AVRINT5),a\r | |
126 | pop bc\r | |
127 | pop hl\r | |
128 | pop ix\r | |
129 | ret\r | |
130 | \r | |
131 | \r | |
132 | ;--------------------------------------------------------------\r | |
133 | ;\r | |
134 | ; (hl): data\r | |
135 | \r | |
136 | msg.sout:\r | |
137 | push ix\r | |
138 | ld ix,mtx.fifo ;\r | |
139 | \r | |
140 | push bc\r | |
141 | push de\r | |
142 | ld b,(hl) ;\r | |
143 | inc hl\r | |
144 | ex de,hl\r | |
145 | \r | |
146 | ms.ol:\r | |
147 | push ix\r | |
148 | pop hl\r | |
149 | ld c,(ix+o.in_idx) ;\r | |
150 | ld a,c\r | |
151 | add l\r | |
152 | ld l,a\r | |
153 | jr nc,ms.on\r | |
154 | inc h\r | |
155 | ms.on:\r | |
156 | ld a,c ;\r | |
157 | inc a\r | |
158 | and (ix+o.mask)\r | |
159 | ms.wait:\r | |
160 | cp (ix+o.out_idx) ;\r | |
161 | jr z,ms.wait\r | |
162 | ld c,a\r | |
163 | ld a,(de)\r | |
164 | inc de\r | |
165 | ld (hl),a\r | |
166 | ld (ix+o.in_idx),c\r | |
167 | djnz ms.ol\r | |
168 | out0 (AVRINT5),a\r | |
169 | ex de,hl\r | |
170 | pop de\r | |
171 | pop bc\r | |
172 | pop ix\r | |
173 | ret\r | |
174 | \r | |
175 | ;--------------------------------------------------------------\r | |
176 | \r | |
177 | msg.co:\r | |
178 | push af\r | |
179 | push hl\r | |
180 | ld (buf_char),a\r | |
181 | ld hl,buf\r | |
182 | call msg.sout\r | |
183 | pop hl\r | |
184 | pop af\r | |
185 | ret\r | |
186 | \r | |
187 | \r | |
188 | buf:\r | |
189 | db buf_end - $ - 1 ;output string length\r | |
3531528e | 190 | db 0AEh ; message start token\r |
6a4e9540 L |
191 | db buf_end - $ - 1 ; message length\r |
192 | db 1 ; command\r | |
193 | db 1 ; subcommand\r | |
194 | buf_char:\r | |
195 | db 0 ; pay load\r | |
196 | buf_end:\r | |
197 | \r | |
198 | ;----------------------------------------------------------------------\r | |
199 | \r | |
200 | end\r | |
201 | \r |