[Coco] My coco hates me :-(
gene.heskett at verizon.net
Mon Mar 16 16:26:52 EDT 2009
On Monday 16 March 2009, Willard Goosey wrote:
>On Sun, Mar 15, 2009 at 02:13:40PM -0400, Gene Heskett wrote:
>> And where is that pack addressed? I don't know where mine is ATM because
>> I have moved it from its original address, else I wouldn't have to ask.
>> Or has bit rot played with the /t2 descriptor & crc checking is turned
>No, I just checked, all kernal modules in memory have good crcs.
>> The other possibility that just came to mind is an IRQ clash, you
>> may want to check that, the rs-232 pack should probably have a
>> higher priority setting since the drive has a buffer while the
>> rs-232 pack does not. And obviously a different address for the IRQ
>> service routine. irqs, and of course xmode should be able to
>> display this.
>Humm. I'm not sure the IDE board even uses an interrupt. It doesn't
>show up in the listing from irqs. After iniz'ing t2, /T2 has priority
>0A. The only strange thing is that irqs reports the port as being
I believe that is the status register.
>The only weirdnes about the RS-232 pak *I* know of is that I've got a
>smartwatch in its ROM socket. I'm not using the smartwatch clock
>module, though, just the regular software clock. So, the only time
>the smartwatch gets poked is when I run a seperate program to read
>it. Those utilities are from the Glenside Y2K patch set, and as far
>as I know they properly restore the MPI settings?
Unknown to me as I haven't used them.
>Maybe the serial pak's DC-to-DC power converter is dying, and pulling
>enough +5 to flake out everything else on the MPI bus? And that shows
>up as hard-drive problems because that's the device that gets used
>more than any other?
Maybe, but generally when it starts sucking extra power, its remaining life is
in minutes. It is a small package & doesn't take much to cook it. Long since
removed from mine (for exactly that reason, I was clearing the smoke from the
room) and runners to the edge connector to pick up mpi power substituted.
>This seems like a possibility to me because, when I put the rs-232 pak
>back in slot 0, my CoCo couldn't even read its boot disk to boot
>NitrOS-9 until I'd removed the Speech/Sound pak from slot 1...
>Possibly because the floppy control (fd502 shorty, stock) was getting
>starved for power?
Make sense also that the psu in the MPI may be headed south, bad electrolytics
maybe? Again, not a problem here, no psu components in my MPI, the whole rig
is running on an old old AT power supply using those 4 pin flat plug trailer
connectors, for more than a decade now. That would starve it, without cooking
that little aztec supply in the rs-232 pack. OTOH, it wouldn't hurt to look
at the labels on that little tin box in the rs-232 pack, for heat
discoloration evidence. Covering all the bases. :)
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
The world is full of people who have never, since childhood, met an
open doorway with an open mind.
-- E.B. White
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