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AltairZ80: Adds -H switch to LOAD command for loading Intel hex files

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This commit is contained in:
Patrick Linstruth 2023-01-15 08:51:35 -08:00
parent ce791138b5
commit 1a1366650c
1 changed files with 65 additions and 0 deletions
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65
AltairZ80/altairz80_cpu.c
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@ -174,6 +174,7 @@ static t_stat cpu_ex(t_value *vptr, t_addr addr, UNIT *uptr, int32 sw);
static t_stat cpu_dep(t_value val, t_addr addr, UNIT *uptr, int32 sw);
static t_stat cpu_reset(DEVICE *dptr);
static t_bool cpu_is_pc_a_subroutine_call (t_addr **ret_addrs);
static t_stat cpu_hex_load(FILE *fileref, CONST char *cptr, CONST char *fnam, int flag);
static t_stat sim_instr_mmu(void);
static uint32 GetBYTE(register uint32 Addr);
static void PutWORD(register uint32 Addr, const register uint32 Value);
@ -7244,6 +7245,8 @@ t_stat sim_load(FILE *fileref, CONST char *cptr, CONST char *fnam, int flag) {
char gbuf[CBUFSIZE];
if (chiptype == CHIP_TYPE_M68K)
return sim_load_m68k(fileref, cptr, fnam, flag);
if (sim_switches & SWMASK ('H'))
return cpu_hex_load(fileref, cptr, fnam, flag);
if (flag) {
result = get_range(NULL, cptr, &lo, &hi, 16, ADDRMASKEXTENDED, 0);
if (result == NULL)
@ -7300,6 +7303,68 @@ t_stat sim_load(FILE *fileref, CONST char *cptr, CONST char *fnam, int flag) {
return SCPE_OK;
}
/* cpu_hex_load will load an Intel hex file into RAM.
Based on HEX2BIN by Mike Douglas
https://deramp.com/downloads/misc_software/hex-binary utilities for the PC/
*/
static t_stat cpu_hex_load(FILE *fileref, CONST char *cptr, CONST char *fnam, int flag) {
char linebuf[1024], datastr[1024], *bufptr;
int32 bytecnt, rectype, databyte, chksum, line = 0, cnt = 0;
t_addr addr, org = 0;
while (!feof(fileref)) {
if (fgets(linebuf, sizeof(linebuf), fileref) == NULL)
break;
line++;
/* Strip EOL characters */
if ((bufptr = strchr(linebuf, '\r')) != NULL) {
*bufptr = '\0';
}
if ((bufptr = strchr(linebuf, '\n')) != NULL) {
*bufptr = '\0';
}
if (strlen(linebuf) == 0)
continue;
if (sscanf(linebuf, ":%2x%4x%2x%s", &bytecnt, &addr, &rectype, datastr) != 4) {
return sim_messagef(SCPE_IERR, "Hex file format error at line %d\n", line);
}
chksum = bytecnt + (addr >> 8) + (addr & 0xff) + rectype;
bufptr = datastr;
if ((rectype == 0) && (bytecnt > 0) && (addr+bytecnt <= MAXMEMORY)) {
if (cnt == 0)
org = addr;
do {
if (sscanf(bufptr, "%2x", &databyte) != 1) {
return sim_messagef(SCPE_IERR, "Hex file format error at line %d\n", line);
}
bufptr += 2;
PutBYTE(addr++, databyte);
chksum += databyte;
cnt++;
} while (--bytecnt != 0);
if (sscanf(bufptr, "%2x", &databyte) != 1) { /* checksum byte */
return sim_messagef(SCPE_IERR, "Hex file format error at line %d\n", line);
}
if (0 != ((chksum+databyte) & 0xff)) {
return sim_messagef(SCPE_IERR, "Checksum error at line %d\n %s\n", line, linebuf);
}
}
}
return sim_messagef(SCPE_OK, "%d byte%s loaded at %x.\n", PLURAL(cnt), org);
}
void cpu_raise_interrupt(uint32 irq) {
extern void cpu8086_intr(uint8 intrnum);