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PDP11, VAX: Fix SET RPn BADBLOCK behavior and auto sizing.

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BAD144 info was written correctly if the user answered Y when the disk
image was created, but would not work if SET RPn BADBLOCK was
entered later.

Auto sizing would be potentially wrong if a disk had been created
without writing the BAD144 data.  Now, if the disk contains a file system
that information along with the physical container's size is used to
properly auto size the disk.
This commit is contained in:
Mark Pizzolato
2017-02-07 13:02:21 -08:00
parent f46c048bb6
commit 76dda8a01e
3 changed files with 41 additions and 54 deletions
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41
PDP11/pdp11_io_lib.c
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@@ -921,44 +921,9 @@ return SCPE_OK;
sta = status code
*/
#include "sim_disk.h"
t_stat pdp11_bad_block (UNIT *uptr, int32 sec, int32 wds)
{
int32 i;
t_addr da;
uint16 *buf;
char *namebuf, *c;
uint32 packid;
if ((sec < 2) || (wds < 16))
return SCPE_ARG;
if ((uptr->flags & UNIT_ATT) == 0)
return SCPE_UNATT;
if (uptr->flags & UNIT_RO)
return SCPE_RO;
if (!get_yn ("Overwrite last track? [N]", FALSE))
return SCPE_OK;
da = (uptr->capac - (sec * wds)) * sizeof (uint16);
if (sim_fseek (uptr->fileref, da, SEEK_SET))
return SCPE_IOERR;
if ((buf = (uint16 *) malloc (wds * sizeof (uint16))) == NULL)
return SCPE_MEM;
namebuf = uptr->filename;
if ((c = strrchr (namebuf, '/')))
namebuf = c+1;
if ((c = strrchr (namebuf, '\\')))
namebuf = c+1;
if ((c = strrchr (namebuf, ']')))
namebuf = c+1;
packid = eth_crc32(0, namebuf, strlen (namebuf));
buf[0] = (uint16)packid;
buf[1] = (uint16)(packid >> 16) & 0x7FFF; /* Make sure MSB is clear */
buf[2] = buf[3] = 0;
for (i = 4; i < wds; i++)
buf[i] = 0177777u;
for (i = 0; (i < sec) && (i < 10); i++)
sim_fwrite (buf, sizeof (uint16), wds, uptr->fileref);
free (buf);
if (ferror (uptr->fileref))
return SCPE_IOERR;
return SCPE_OK;
return sim_disk_pdp11_bad_block (uptr, sec, wds);
}