Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!mephisto!udel!mmdf
From: UPSYF173%DBIUNI11.BITNET@cunyvm.cuny.edu (Wolfgang Thiel)
Newsgroups: comp.os.minix
Subject: Re: ST 1.5.10 with two harddisks works just fine
Message-ID: <25146@nigel.udel.EDU>
Date: 20 Jul 90 08:36:47 GMT
Sender: usenet@ee.udel.EDU
Lines: 16


     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!
                                    Wolfgang