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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 | |
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 | dseg\r | |
19 | \r | |
20 | mkbuf mrx.fifo,mrx.fifo_len\r | |
21 | mkbuf mtx.fifo,mtx.fifo_len\r | |
22 | \r | |
23 | ;--------------------------------------------------------------\r | |
24 | \r | |
25 | cseg\r | |
26 | \r | |
27 | ;\r | |
28 | ; Init buffer\r | |
29 | ;\r | |
30 | \r | |
31 | msginit:\r | |
32 | ld ix,mrx.fifo\r | |
33 | ld a,mrx.fifo.mask\r | |
34 | call buf.init\r | |
35 | ld ix,mtx.fifo\r | |
36 | ld a,mtx.fifo.mask\r | |
37 | jp buf.init\r | |
38 | \r | |
39 | ;--------------------------------------------------------------\r | |
40 | \r | |
41 | msgi.st:\r | |
42 | push ix\r | |
43 | ld ix,mrx.fifo ;\r | |
44 | \r | |
45 | buf.empty:\r | |
46 | ld a,(ix+o.in_idx) ;\r | |
47 | sub (ix+o.out_idx) ;\r | |
48 | pop ix\r | |
49 | ret z\r | |
50 | or 0ffh\r | |
51 | ret\r | |
52 | \r | |
53 | ;--------------------------------------------------------------\r | |
54 | \r | |
55 | msg.in:\r | |
56 | push ix\r | |
57 | ld ix,mrx.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 | |
74 | \r | |
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 | |
79 | \r | |
80 | ld a,l\r | |
81 | pop hl\r | |
82 | pop ix\r | |
83 | ret\r | |
84 | \r | |
85 | ;--------------------------------------------------------------\r | |
86 | \r | |
87 | msgo.st:\r | |
88 | push ix\r | |
89 | ld ix,mtx.fifo ;\r | |
90 | \r | |
91 | buf.full:\r | |
92 | ld a,(ix+o.in_idx) ;\r | |
93 | inc a\r | |
94 | and (ix+o.mask)\r | |
95 | sub (ix+o.out_idx) ;\r | |
96 | pop ix\r | |
97 | ret z\r | |
98 | or 0ffh\r | |
99 | ret\r | |
100 | \r | |
101 | ;--------------------------------------------------------------\r | |
102 | \r | |
103 | msg.out:\r | |
104 | push ix\r | |
105 | ld ix,mtx.fifo ;\r | |
106 | \r | |
107 | buf.put:\r | |
108 | push hl ;\r | |
109 | push bc\r | |
110 | push ix\r | |
111 | pop hl\r | |
112 | ld c,(ix+o.in_idx) ;\r | |
113 | ld b,0\r | |
114 | add hl,bc\r | |
115 | ld b,a\r | |
116 | \r | |
117 | ld a,c ;\r | |
118 | inc a\r | |
119 | and (ix+o.mask)\r | |
120 | bp.wait:\r | |
121 | cp (ix+o.out_idx) ;\r | |
122 | jr z,bp.wait\r | |
123 | ld (hl),b\r | |
124 | ld (ix+o.in_idx),a\r | |
125 | \r | |
126 | ld a,b\r | |
64cc2207 | 127 | out (AVRINT5),a\r |
6a4e9540 L |
128 | pop bc\r |
129 | pop hl\r | |
130 | pop ix\r | |
131 | ret\r | |
132 | \r | |
133 | \r | |
134 | ;--------------------------------------------------------------\r | |
135 | ;\r | |
136 | ; (hl): data\r | |
137 | \r | |
138 | msg.sout:\r | |
139 | push ix\r | |
140 | ld ix,mtx.fifo ;\r | |
141 | \r | |
142 | push bc\r | |
143 | push de\r | |
144 | ld b,(hl) ;\r | |
145 | inc hl\r | |
146 | ex de,hl\r | |
147 | \r | |
148 | ms.ol:\r | |
149 | push ix\r | |
150 | pop hl\r | |
151 | ld c,(ix+o.in_idx) ;\r | |
152 | ld a,c\r | |
153 | add l\r | |
154 | ld l,a\r | |
155 | jr nc,ms.on\r | |
156 | inc h\r | |
157 | ms.on:\r | |
158 | ld a,c ;\r | |
159 | inc a\r | |
160 | and (ix+o.mask)\r | |
161 | ms.wait:\r | |
162 | cp (ix+o.out_idx) ;\r | |
163 | jr z,ms.wait\r | |
164 | ld c,a\r | |
165 | ld a,(de)\r | |
166 | inc de\r | |
167 | ld (hl),a\r | |
168 | ld (ix+o.in_idx),c\r | |
169 | djnz ms.ol\r | |
64cc2207 | 170 | out (AVRINT5),a\r |
6a4e9540 L |
171 | ex de,hl\r |
172 | pop de\r | |
173 | pop bc\r | |
174 | pop ix\r | |
175 | ret\r | |
176 | \r | |
177 | ;--------------------------------------------------------------\r | |
178 | \r | |
179 | msg.co:\r | |
180 | push af\r | |
181 | push hl\r | |
182 | ld (buf_char),a\r | |
183 | ld hl,buf\r | |
184 | call msg.sout\r | |
185 | pop hl\r | |
186 | pop af\r | |
187 | ret\r | |
188 | \r | |
189 | \r | |
190 | buf:\r | |
191 | db buf_end - $ - 1 ;output string length\r | |
3531528e | 192 | db 0AEh ; message start token\r |
6a4e9540 L |
193 | db buf_end - $ - 1 ; message length\r |
194 | db 1 ; command\r | |
195 | db 1 ; subcommand\r | |
196 | buf_char:\r | |
197 | db 0 ; pay load\r | |
198 | buf_end:\r | |
199 | \r | |
200 | ;----------------------------------------------------------------------\r | |
201 | \r | |
202 | end\r | |
203 | \r |