bartm@praxis.cs.ruu.nl (Bart Muyzer) (07/20/90)
Hi,
I tried to hook up two harddisks to an atari running ST 1.5.0. I recompiled
the kernel with NR_DRIVES (in <minix/config.h>) set to 3, booted the new
system, created the devices, and it all works fine. The two drives are each on
one controller, so the situation is:
controller 0, lun 0: first disk,
controller 0, lun 1: **no disk connected**
controller 1, lun 0: second disk,
controller 1, lun 1: **no disk connected**
I jumpered the second disk to 'Target #1 == ACSI-id #1'.
Remember to use major device number 3, and to built the minor device number
like:
ccccdppp c = controller number
d = disk number (0 or 1 -> max. 2 disks/controller!)
p = partition number (see stwini.c)
I also dived deeply into stwini, learned how to program the DMA and the HDC,
and I couldn't find any errors. So I guess making the new devices and
recompiling the kernel should do...
Good luck,
>] Bart [<UPSYF173%DBIUNI11.BITNET@cunyvm.cuny.edu (Wolfgang Thiel) (07/20/90)
Hi,
There a_r_e errors in stwini.c/stdma.c ST1.5.10:
The #ifdef SUPRA look fine, but: SUPRA is always defined in config.h,but this
#define means the partitioning, not the interrupt handling. The SUPRA stuff
didnt't work with my harddisk (SCSI, ICD-Hostadaptor, QUANTUM).
And be careful with the DELAY counters (may-be this is in stdma.c, I
don't recall): the test is: while(--counter > 0)... So, if you change the
counter to unsigned int (which I did to test longer delays!) 0 means a very
long delay, not a short one. Somewhere in the driver, there is a line
while (--delay > 0); which is followed two lines later by while(--delay >0);
without resetting delay to the initial value; so, the 2nd loop finishes
immediately (or very late with unsigned). I think this was in dma_wcmd().
Why was the extended partitions patch not included into 1.5.10? There
will be many people with more then 4 partitions right now!
Wolfgangeesrajm@cc.brunel.ac.uk (Andrew J Michael) (07/26/90)
In article <25146@nigel.udel.EDU>, UPSYF173%DBIUNI11.BITNET@cunyvm.cuny.edu (Wolfgang Thiel) writes: > > Hi, > There a_r_e errors in stwini.c/stdma.c ST1.5.10: > The #ifdef SUPRA look fine, but: SUPRA is always defined in config.h,but this > #define means the partitioning, not the interrupt handling. The SUPRA stuff > didnt't work with my harddisk (SCSI, ICD-Hostadaptor, QUANTUM). > And be careful with the DELAY counters (may-be this is in stdma.c, I (Stuff deleted) > Wolfgang Correct. The official stwini.c will NOT work with later Supra adaptors and will in fact happily mangle a filesystem on such a disk. I sent a patch to Frans, but had no reply, so I'm posting it. This patch will fix the above mentioned problems and also adds the patch to access /dev/hd0 correctly. Apply it to the unadulterated 1.5.10 stwini.c. -------------- snip, snip --------- *** stwini.c.old Sun May 20 15:58:04 1990 --- stwini.c.new Sun May 20 15:58:50 1990 *************** *** 3,9 **** * This file contains a driver for the Hard Disk Controller (HDC) * on the Atari ST. * If yor drive is an old Supra drive you perhaps want to compile ! * using -DSUPRA. The code added with #ifdef SUPRA/#endif is taken * from usenet and not verified (since I do not have such a drive) * * The driver supports two operations: read a block and write a block. --- 3,9 ---- * This file contains a driver for the Hard Disk Controller (HDC) * on the Atari ST. * If yor drive is an old Supra drive you perhaps want to compile ! * using -DSUPRA=1. The code added with #if SUPRA/#endif is taken * from usenet and not verified (since I do not have such a drive) * * The driver supports two operations: read a block and write a block. *************** *** 107,113 **** for (drive = 0; drive < NR_DRIVES; drive++) { minor = drive << 3; /* read sector 0 of the drive and copy the partition info */ ! pi[minor].pi_size = 1; dmagrab(WINCHESTER, hdcint); r = do_xfer(drive, (phys_bytes)&hi, 0L, 1, DISK_READ); dmafree(WINCHESTER); --- 107,113 ---- for (drive = 0; drive < NR_DRIVES; drive++) { minor = drive << 3; /* read sector 0 of the drive and copy the partition info */ ! pi[minor].pi_size = 2; dmagrab(WINCHESTER, hdcint); r = do_xfer(drive, (phys_bytes)&hi, 0L, 1, DISK_READ); dmafree(WINCHESTER); *************** *** 224,230 **** * do_xfer * *===========================================================================*/ ! #ifdef SUPRA #define PNK_DELAY 50 /* tunable */ #endif --- 224,230 ---- * do_xfer * *===========================================================================*/ ! #if SUPRA #define PNK_DELAY 50 /* tunable */ #endif *************** *** 260,282 **** wrbit = WRBIT; } r = cmdtail(drive, sector, count); /* command parameters */ ! #ifndef SUPRA IENABLE(); #endif if (r == OK) { ! #ifdef SUPRA IENABLE(); #endif dmacomm(wrbit | FDC | SCREG, count, HDC_DELAY); ! DMA->dma_mode = wrbit | FDC | HDC | A0; ! dmawcmd(0, wrbit); receive(HARDWARE, &mess); /* Wait for interrupt. */ ! #ifdef SUPRA IDISABLE(); #endif s = dmardat(wrbit | FDC | HDC | A0, HDC_DELAY); if (s & HDC_CC) { ! #ifdef SUPRA if ((s & HDC_CC) != 2) /* 2: invalid cyl/no drive */ #endif printf("hd: %s: drive=%d sector=%D status=0x%x\n", --- 260,282 ---- wrbit = WRBIT; } r = cmdtail(drive, sector, count); /* command parameters */ ! #if (SUPRA == 0) IENABLE(); #endif if (r == OK) { ! #if SUPRA IENABLE(); #endif dmacomm(wrbit | FDC | SCREG, count, HDC_DELAY); ! dmawdat(wrbit | FDC | HDC | A0, 0, HDC_DELAY); ! DMA->dma_mode = wrbit; receive(HARDWARE, &mess); /* Wait for interrupt. */ ! #if SUPRA IDISABLE(); #endif s = dmardat(wrbit | FDC | HDC | A0, HDC_DELAY); if (s & HDC_CC) { ! #if SUPRA if ((s & HDC_CC) != 2) /* 2: invalid cyl/no drive */ #endif printf("hd: %s: drive=%d sector=%D status=0x%x\n", *************** *** 286,292 **** } if (dmardat(FDC, HDC_DELAY)) /* finish HDC command */ ; ! #ifdef SUPRA for (s = 0; s< PNK_DELAY; s++) {} /* Guarantee interrupt is gone */ IENABLE(); /* re-enable normal interrupts */ #endif --- 286,292 ---- } if (dmardat(FDC, HDC_DELAY)) /* finish HDC command */ ; ! #if SUPRA for (s = 0; s< PNK_DELAY; s++) {} /* Guarantee interrupt is gone */ IENABLE(); /* re-enable normal interrupts */ #endif --------------- Andy Michael -- Andy Michael (eesrajm@cc.brunel.ac.uk) " Software cannot be written to 85 Hawthorne Crescent be completely free of errors." West Drayton Middlesex - Acorn Computers Ltd. UB7 9PA