23 May
2010
23 May
'10
2:24 p.m.
Just wondering if anyone has the pinout for the NCR 53C400 SCSI
controller (68 pin PLCC).
FWIW, I have the "NCR 5380 53C80 SCSI Interface Chip Design Manual"
as well as the NCR "SCSI Engineering Notebook", if anyone cares to
form a collection of information for early NCR SCSI chips.
--Chuck
23 May
23 May
5:27 p.m.
On 23 May 2010 at 11:24, Chuck Guzis wrote:
Just wondering if anyone has the pinout for the NCR
53C400 SCSI
controller (68 pin PLCC).
Found it on www.Datasheet4u.com. I'd give a PDF download link, but
the site uses a PHP mechanism to make sure that no one can link to
the datasheets, so you have to start from here:
http://www.datasheet4u.com/download.php?id=549218
--Chuck
5:37 p.m.
On Sunday 23 May 2010, Chuck Guzis wrote:
On 23 May 2010 at 11:24, Chuck Guzis wrote:
Wow, their watermarking is really annoying. Do they need to put *4*
watermarks on each page? This is actually bad enough that it gets in
the way of reading the sheet.
Pat
--
Purdue University Research Computing --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
Just wondering if anyone has the pinout for the
NCR 53C400 SCSI
controller (68 pin PLCC).
Found it on www.Datasheet4u.com. I'd give a PDF download link, but
the site uses a PHP mechanism to make sure that no one can link to
the datasheets, so you have to start from here:
http://www.datasheet4u.com/download.php?id=549218
6:57 p.m.
On 23 May 2010 at 17:37, Patrick Finnegan wrote:
Wow, their watermarking is really annoying. Do they
need to put *4*
watermarks on each page? This is actually bad enough that it gets in
the way of reading the sheet.
Fortunately, one can edit the PDF, or simply extract the page images
and toss the watermark images.
--Chuck
24 May
24 May
12:24 a.m.
On 5/23/10 2:24 PM, Chuck Guzis wrote:
Just wondering if anyone has the pinout for the NCR
53C400 SCSI
controller (68 pin PLCC).
I don't, but I see you've found it. New project?
FWIW, I have the "NCR 5380 53C80 SCSI Interface
Chip Design Manual"
as well as the NCR "SCSI Engineering Notebook", if anyone cares to
form a collection of information for early NCR SCSI chips.
Hmm! I'd not mind giving some shelf space to those if they're
looking for a home.
-Dave
--
Dave McGuire
Port Charlotte, FL
1:18 a.m.
On 24 May 2010 at 0:24, Dave McGuire wrote:
Hmm! I'd not mind giving some shelf space to
those if they're
looking for a home.
I'll probably just pass them on to Al if he'd like to post them for
the public weal. The "notebook" concerns itself with the 53c80,
53c81 (differential version of the '80), 5385 and 5386. Mostly a
collection of papers and state diagrams. The 5380 design manual is
far more useful; it even has a 6502 sample program to talk to one.
--Chuck
9:46 a.m.
On 5/24/10, Chuck Guzis <cclist at sydex.com> wrote:
I'll probably just pass them on to Al if he'd
like to post them for
the public weal. The "notebook" concerns itself with the 53c80,
53c81 (differential version of the '80), 5385 and 5386. Mostly a
collection of papers and state diagrams. The 5380 design manual is
far more useful; it even has a 6502 sample program to talk to one.
That sounds cool. I have a few examples of 5380 implementations
(uVAX2K, Amiga, ISA, 68K Mac...) but I don't think I have one on a
6502. That would be interesting to look over.
-ethan
11:50 a.m.
On 24 May 2010 at 9:46, Ethan Dicks wrote:
That sounds cool. I have a few examples of 5380
implementations
(uVAX2K, Amiga, ISA, 68K Mac...) but I don't think I have one on a
6502. That would be interesting to look over.
The 53C400 datasheet was an eye-opener. When I grabbed a Trantor
T130 card, I was surprised to find that it was a very wierd bird
indeed. The 53C400 can decode all 20 bits of an 8-bit ISA address,
provides for 8 address ranges, as well as handshake for DMA and IRQ
and EPROM chip select. Basically, to do an 8 bit ISA controller, you
need only an LS245, a 2764 EPROM (if you want to boot with it) and
the 53C400. Access is all memory-mapped I/O.
The T130 takes this and turns it on its head with two PALs, making
the 53C400 I/O port mapped (at least partially). It's a needlessly
convoluted design. I wonder if the intention was to emulate an older
5380 design. In reality, there's no reason that a 53C400 design
needs to be any more complicated than a Seagate ST01 or Future Domain
TMC850 design--and I suspect that the two latter controllers are just
variations on the NCR design.
--Chuck
12:52 p.m.
On 5/24/10, Chuck Guzis <cclist at sydex.com> wrote:
On 24 May 2010 at 9:46, Ethan Dicks wrote:
Neat.
That sounds cool. I have a few examples of 5380
implementations
(uVAX2K, Amiga, ISA, 68K Mac...)...
The 53C400 datasheet was an eye-opener. When I grabbed a Trantor
T130 card, I was surprised to find that it was a very wierd bird
indeed. The 53C400 can decode all 20 bits of an 8-bit ISA address,
provides for 8 address ranges, as well as handshake for DMA and IRQ
and EPROM chip select. Basically, to do an 8 bit ISA controller, you
need only an LS245, a 2764 EPROM (if you want to boot with it) and
the 53C400. Access is all memory-mapped I/O. The T130 takes this and turns it on its head with two
PALs, making
the 53C400 I/O port mapped (at least partially). It's a needlessly
convoluted design. I wonder if the intention was to emulate an older
5380 design.
It's likely. I have a T128 that came with my original NEC CDR-72
drive from DAK (that happens to have a boot ROM, so I have a bootable
8-bit SCSI interface for 8-bit PCs!) I can imagine that the T-130 was
made to superficially resemble the T-128, at least from either a
driver or boot ROM architecture standpoint (especially the memory
mapped vs I/O mapped part).
-ethan
12:55 p.m.
On 5/24/10 1:18 AM, Chuck Guzis wrote:
Sounds good. Personally, in this case I'm interested in the info, not
necessarily the books themselves.
Hmm!
I'd not mind giving some shelf space to those if they're
looking for a home.
I'll probably just pass them on to Al if he'd like to post them for
the public weal. The "notebook" concerns itself with the
53c80,
53c81 (differential version of the '80), 5385 and 5386. Mostly a
collection of papers and state diagrams. The 5380 design manual is
far more useful; it even has a 6502 sample program to talk to one.
Excellent!
-Dave
--
Dave McGuire
Port Charlotte, FL
5207
days inactive
5208
days old
10 comments
5 participants
participants (5)
-
aek＠bitsavers.org -
cclist＠sydex.com -
ethan.dicks＠gmail.com -
mcguire＠neurotica.com -
pat＠computer-refuge.org