Commit | Line | Data |
---|---|---|
8d8c20ed DR |
1 | / |
2 | / | |
3 | ||
4 | / a4 -- pdp-11 assembler pass 2 | |
5 | ||
6 | oset: | |
7 | mov r2,-(sp) | |
8 | mov r3,-(sp) | |
9 | mov (r5)+,r3 | |
10 | mov r1,r2 | |
11 | bic $!777,r1 | |
12 | add r3,r1 | |
13 | add $8,r1 | |
14 | mov r1,(r3)+ / next slot | |
15 | mov r3,r1 | |
16 | add $1006,r1 | |
17 | mov r1,(r3)+ / buf max | |
18 | mov r0,(r3)+ | |
19 | mov r2,(r3)+ / seek addr | |
20 | mov (sp)+,r3 | |
21 | mov (sp)+,r2 | |
22 | rts r5 | |
23 | ||
24 | putw: | |
25 | mov r1,-(sp) | |
26 | mov r2,-(sp) | |
27 | mov (r5)+,r2 | |
28 | mov (r2)+,r1 / slot | |
29 | cmp r1,(r2) / buf max | |
30 | bhis 1f | |
31 | mov r0,(r1)+ | |
32 | mov r1,-(r2) | |
33 | br 2f | |
34 | 1: | |
35 | tst (r2)+ | |
36 | mov r0,-(sp) | |
37 | jsr r5,flush1 | |
38 | mov (sp)+,r0 | |
39 | mov r0,*(r2)+ | |
40 | add $2,-(r2) | |
41 | 2: | |
42 | mov (sp)+,r2 | |
43 | mov (sp)+,r1 | |
44 | rts r5 | |
45 | ||
46 | flush: | |
47 | mov (r5)+,r2 | |
48 | cmp (r2)+,(r2)+ | |
49 | flush1: | |
50 | mov (r2)+,0f | |
51 | mov (r2)+,r1 | |
52 | mov r1,0f+2 / seek address | |
53 | mov fout,r0 | |
54 | sys indir; 9f | |
55 | .data | |
56 | 9: sys lseek; 0:..; ..; 0 | |
57 | .text | |
58 | bic $!777,r1 | |
59 | add r2,r1 / write address | |
60 | mov r1,0f | |
61 | mov r2,r0 | |
62 | bis $777,-(r2) | |
63 | add $1,(r2) / new seek addr | |
64 | adc -(r2) | |
65 | cmp -(r2),-(r2) | |
66 | sub (r2),r1 | |
67 | neg r1 | |
68 | mov r1,0f+2 / count | |
69 | mov r0,(r2) / new next slot | |
70 | mov fout,r0 | |
71 | sys indir; 9f | |
72 | jes wrterr | |
73 | .data | |
74 | 9: sys write; 0:..; .. | |
75 | .text | |
76 | rts r5 | |
77 | ||
78 | wrterr: | |
79 | mov $1,r0 | |
80 | sys write; 9f; 8f-9f | |
81 | jmp saexit | |
82 | 9: <as: write error on output\n>; 8: | |
83 | ||
84 | readop: | |
85 | mov savop,r4 | |
86 | beq 1f | |
87 | clr savop | |
88 | rts pc | |
89 | 1: | |
90 | jsr pc,getw1 | |
91 | cmp r4,$200 | |
92 | blo 1f | |
93 | cmp r4,$4000 | |
94 | blo 2f | |
95 | add $usymtab-4000,r4 | |
96 | rts pc | |
97 | 2: | |
98 | add $symtab-1000,r4 | |
99 | 1: | |
100 | rts pc | |
101 | ||
102 | getw: | |
103 | mov savop,r4 | |
104 | beq getw1 | |
105 | clr savop | |
106 | rts pc | |
107 | getw1: | |
108 | dec ibufc | |
109 | bgt 1f | |
110 | movb fin,r0 | |
111 | sys read; inbuf; 512. | |
112 | bes 3f | |
113 | asr r0 | |
114 | mov r0,ibufc | |
115 | bne 2f | |
116 | 3: | |
117 | mov $4,r4 | |
118 | sev | |
119 | rts pc | |
120 | 2: | |
121 | mov $inbuf,ibufp | |
122 | 1: | |
123 | mov *ibufp,r4 | |
124 | add $2,ibufp | |
125 | rts pc |