]>
Commit | Line | Data |
---|---|---|
1 | ; Various functions for the Interaction with the CPM Filesystem | |
2 | ; | |
3 | ; Copyright (C) 2010 Frank Zoll | |
4 | ; | |
5 | ; This file is part of avrcpm. | |
6 | ; | |
7 | ; avrcpm is free software: you can redistribute it and/or modify it | |
8 | ; under the terms of the GNU General Public License as published by | |
9 | ; the Free Software Foundation, either version 3 of the License, or | |
10 | ; (at your option) any later version. | |
11 | ; | |
12 | ; avrcpm is distributed in the hope that it will be useful, | |
13 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | ; GNU General Public License for more details. | |
16 | ; | |
17 | ; You should have received a copy of the GNU General Public License | |
18 | ; along with avrcpm. If not, see <http://www.gnu.org/licenses/>. | |
19 | ; | |
20 | ; $Id$ | |
21 | ; | |
22 | ||
23 | #if CPMDSK_SUPPORT | |
24 | ||
25 | ||
26 | .cseg | |
27 | ||
28 | cpm_lba_to_phys: | |
29 | ldd temp ,z+PTAB_START+0 ; get startsector of partition | |
30 | ldd temp2,z+PTAB_START+1 | |
31 | ldd yl,z+PTAB_START+2 | |
32 | ldd yh,z+PTAB_START+3 | |
33 | ||
34 | add xl,temp ; add offset to startsector | |
35 | adc xh,temp2 | |
36 | adc yl,_0 | |
37 | adc yh,_0 | |
38 | ||
39 | ret | |
40 | ||
41 | ; ==================================================================== | |
42 | ; Function: Add's a CP/M Partition to the Partition table | |
43 | ; ==================================================================== | |
44 | ; Parameters | |
45 | ; -------------------------------------------------------------------- | |
46 | ; Registers : none | |
47 | ; Variables : [r] seekdsk Number of Disk to Read | |
48 | ; [r] seeksec Sector to read | |
49 | ; [r] seektrk Track to read | |
50 | ; -------------------------------------------------------------------- | |
51 | ; Description: | |
52 | ; ==================================================================== | |
53 | cpm_add_partition: | |
54 | ||
55 | ldi temp,dskType_CPM | |
56 | std y+0,temp | |
57 | ||
58 | ldd temp,z+PART_START | |
59 | std y+1,temp | |
60 | ldd temp,z+PART_START+1 | |
61 | std y+2,temp | |
62 | ldd temp,z+PART_START+2 | |
63 | std y+3,temp | |
64 | ldd temp,z+PART_START+3 | |
65 | std y+4,temp | |
66 | ||
67 | ldd temp,z+PART_SIZE+2 | |
68 | ldd temp2,z+PART_SIZE+3 | |
69 | or temp,temp2 ;part size larger than 65535 sectors? | |
70 | brne cpm_add_prune | |
71 | ||
72 | ldd temp,z+PART_SIZE | |
73 | std y+5,temp | |
74 | ldd temp,z+PART_SIZE+1 | |
75 | std y+6,temp | |
76 | rjmp cpm_add_e | |
77 | ||
78 | cpm_add_prune: | |
79 | std y+5,_255 | |
80 | std y+6,_255 | |
81 | ||
82 | cpm_add_e: | |
83 | ret | |
84 | ||
85 | #endif /* CPMDSK_SUPPORT */ | |
86 | ||
87 | ; vim:set ts=8 noet nowrap | |
88 |