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Backout ea64v changes, PCL fixes, disabled curtrack/maxtrack check in devdisk

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This commit is contained in:
Jim
2007-09-01 00:00:00 -04:00
parent 62b8229961
commit 0ea78958b0
3 changed files with 70 additions and 202 deletions
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24
emdev.h
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@@ -1646,12 +1646,6 @@ int devdisk (int class, int func, int device) {
unsigned char *hashp;
int lockkey;
/* NOTE: this iobuf size looks suspicious; probably should be 1040 words,
the largest disk record size, and there probably should be some checks
that no individual DMA exceeds this size, that no individual disk
read or write exceeds 1040 words. Maybe it's 4096 bytes because this
is the largest DMA transfer request size... */
unsigned short iobuf[1040]; /* local I/O buf (for mapped I/O) */
unsigned short *iobufp;
unsigned short access;
@@ -1807,13 +1801,21 @@ int devdisk (int class, int func, int device) {
dc[device].status |= 02000; /* header check (right error?) */
break;
}
#if 0
/* this has been disabled because preseeks in the disk driver sometimes
goof up, depending on timings in the emulator */
if (track != dc[device].unit[u].curtrack) {
fprintf(stderr," Device '%o, order %d at track %d, but positioned to track %d\n", device, order, track, dc[device].unit[u].curtrack);
#if 0
dc[device].status |= 4; /* illegal seek */
break;
#endif
}
#endif
if (track > dc[device].unit[u].maxtrack) {
fprintf(stderr," Device '%o, unit %d, seek to track %d > cylinder limit of %d\n", device, u, track, dc[device].unit[u].maxtrack);
fatal("Invalid seek");
}
/* XXX: could check for head > max head on drive here... */
if (dc[device].unit[u].devfd == -1) {
TRACE(T_INST|T_DIO, " Device '%o unit %d not ready\n", device, u);
@@ -1937,12 +1939,16 @@ int devdisk (int class, int func, int device) {
track = m1 & 03777;
}
TRACE(T_INST|T_DIO, " seek track %d, restore=%d, clear=%d\n", track, (m1 & 0100000) != 0, (m1 & 040000) != 0);
#if 0
/* this has been disabled because SCSI drives sometimes seek to
track 512 (special meaning in controller?) */
if (track > dc[device].unit[u].maxtrack) {
fprintf(stderr," Device '%o, unit %d, seek to track %d > cylinder limit of %d\n", device, u, track, dc[device].unit[u].maxtrack);
dc[device].status |= 4; /* set bit 14: seek error */
track = -1;
}
#
#endif
dc[device].unit[u].curtrack = track;
break;