1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
/*
* (C) Copyright 2015,2016,2018 Leo C. <erbl259-lmu@yahoo.de>
*
* SPDX-License-Identifier: GPL-2.0
*/
/*
* See CP/M 3 System Manual, Appendix D: CPM3.SYS File Format
*/
#include "cmd_loadcpm3.h"
#include "env.h"
#include "ff.h"
#include "eval_arg.h"
#include "con-utils.h"
#include "z80-if.h"
#include "debug.h"
#define RS 128 /* CP/M record size */
#define FSIZE_t DWORD
static FRESULT read_record(FIL *fp, uint8_t *buffer)
{
unsigned int br; /* bytes read */
FRESULT res = f_read(fp, buffer, RS, &br);
if (br != RS)
return EEOF;
return res;
}
/*
* Load Routine
*
* Input: addr = Page Address of load top
* len = Length in pages of module to read
*
*/
ERRNUM load(FIL *File, uint32_t addr, uint8_t len)
{
uint8_t buffer[RS];
len *= 2; /* length in records of module */
//debug("## load: addr: 0x%.4X, records: 0x%.4X, (%u)\n", addr, len, len);
for (; len; len--) {
addr -= RS;
FRESULT res = read_record(File, buffer);
if (res)
return res;
if (!(z80_bus_cmd(Request) & ZST_ACQUIRED))
return EBUSTO;
z80_write_block(buffer, addr, RS);
z80_bus_cmd(Release);
//debug("## written: 0x%.4X\n", addr);
}
return ESUCCESS;
}
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
command_ret_t do_loadcpm3(cmd_tbl_t *cmdtp UNUSED, uint_fast8_t flag UNUSED, int argc, char * const argv[])
{
uint16_t mem_top;
uint8_t res_len;
uint16_t bank_top;
uint8_t bank_len;
uint16_t osentry_addr = 0;
uint32_t common_base = 0;
uint32_t banked_base;
char *fname;
FIL File;
char default_fname[strlen_P(PSTR(CONFIG_CPM3_SYSFILE)) + 1];
uint8_t buffer[RS];
FRESULT res;
//common_base = getenv_ulong(PSTR(ENV_CPM3_COMMON_BASE), 16,
// CONFIG_CPM3_COMMON_BASE);
banked_base = getenv_ulong(PSTR(ENV_CPM3_BANKED_BASE), 16,
CONFIG_CPM3_BANKED_BASE);
if (argc > 3)
banked_base = eval_arg(argv[3], NULL);
if (argc > 2)
common_base = eval_arg(argv[2], NULL);
fname = getenv_str(PSTR(ENV_CPM3_SYSFILE));
if (fname == NULL || *fname == '\0') {
strcpy_P(default_fname, PSTR(CONFIG_CPM3_SYSFILE));
fname = default_fname;
}
if (argc > 1) {
fname = argv[1];
}
res = f_open(&File, fname, FA_READ );
if (res)
goto out;
printf_P(PSTR("Loading: '%s'...\n"), fname);
/* read the load record */
res = read_record(&File, buffer);
if (res)
goto out;
mem_top = buffer[0] << 8;
res_len = buffer[1];
bank_top = buffer[2] << 8;
bank_len = buffer[3];
osentry_addr = buffer[4] + (buffer[5] << 8);
/* read display info */
res = read_record(&File, buffer);
if (res)
goto out;
/* print the info */
buffer[RS-1] = '$';
uint8_t *p = memchr(buffer, '$', RS);
*p = '\0';
my_puts((char *)buffer);
if (common_base == 0) {
/* read common base
* http://www.seasip.info/Cpm/scb.html
*/
FSIZE_t common_base_ofs = ((res_len - 6) << 8) + 2*RS + RS-7;
FSIZE_t cur_pos = f_tell(&File);
unsigned int br; /* bytes read */
if ((res = f_lseek(&File, common_base_ofs)) ||
(res = f_read(&File, buffer, 2, &br)) ||
(res = f_lseek(&File, cur_pos)))
goto out;
if (br != 2) {
res = EEOF;
goto out;
}
common_base = (uint16_t) buffer[0] + (buffer[1] << 8);
setenv_hex(PSTR(ENV_CPM3_COMMON_BASE), common_base);
}
setenv_hex(PSTR(ENV_CPM3_SCB), mem_top - ((res_len - (6 - 1)) << 8) + common_base);
/* Main System Load */
/* Load Common Portion of System */
if ((res = load(&File, common_base + mem_top, res_len)) != 0)
goto out;
/* Load Banked Portion of System */
res = load(&File, banked_base + bank_top, bank_len);
out:
f_close(&File);
if (res)
cmd_error(CMD_RET_FAILURE, res, PSTR("%s"), fname);
if (res_len != 0) {
if (osentry_addr + common_base > 0xffff) {
z80_bus_cmd(Request);
if (z80_read(osentry_addr + common_base) == 0xc3) {
osentry_addr = z80_read(osentry_addr+common_base+1) +
(z80_read(osentry_addr + common_base+2) << 8);
}
z80_bus_cmd(Release);
if (banked_base + osentry_addr > 0xffff)
osentry_addr = 0;
}
setenv_hex(PSTR(ENV_STARTADDRESS), osentry_addr);
}
printf_P(PSTR("Loaded: Resident: "));
if (res_len != 0)
printf_P(PSTR("%.5lX-%.5lX, "),
(common_base + mem_top) - res_len*256,
(common_base + mem_top) - 1);
else
printf_P(PSTR(" - "));
printf_P(PSTR("Banked: "));
if (bank_len != 0)
printf_P(PSTR("%.5lX-%.5lX\n"),
(banked_base + bank_top) - bank_len*256,
(banked_base + bank_top) - 1);
else
printf_P(PSTR(" - \n"));
return CMD_RET_SUCCESS;
}
|
