What about the 37C65 floppy disk controller chip?
Kolaga
Can anyone tell me where to get data sheets for the 37C65 floppy disk
controller chip? I understand that it is a 765 chip with a built in
data separator and a few other external thingies built in.
Essentially, it's a one chip interface to the standard IBM floppy
diskette drives.
Who is the manufacturer? I'm interested in building a 6809 or 68008
based single board computer with a small chip count. OS's like
CUBIX or CP/M-68K interest me.
Thanks.
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Don Maslin
Kolaga (Xiuhtecuht...@worldnet.att.net) wrote:
: Can anyone tell me where to get data sheets for the 37C65 floppy disk
You might check with Western Digital. They used one that they built
in some of their controllers.
- don
do...@cts.com
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Chairman, Dina-SIG of the San Diego Computer Society
Clinging tenaciously to the trailing edge of technology.
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see old system support at http://www.psyber.com/~tcj
timo...@cyberramp.net
Xiuhtecuht...@worldnet.att.net (Kolaga) wrote:
>Can anyone tell me where to get data sheets for the 37C65 floppy disk
>controller chip? I understand that it is a 765 chip with a built in
>data separator and a few other external thingies built in.
>Essentially, it's a one chip interface to the standard IBM floppy
>diskette drives.
>Who is the manufacturer? I'm interested in building a 6809 or 68008
>based single board computer with a small chip count. OS's like
>CUBIX or CP/M-68K interest me.
Also, check out the National 8473, and the SMC37C65x family. A second
source for the WD37C65 is Goldstar, who made a pin compatible version.
I don't reccomend the 37C65 as it requires some nasty components; two
sryctals, one of which is an odball freq., and four silver/mica caps.
Also, you need to put 100ohm resistors in series with the TC, and IRQ
lines that drive the bus. These pins have 48ma drivers on them, and
they generate a LOT of ground bounce.
The National part uses a single 24 mhz cyrstal, or oscillator module,
and only a couple of simple crystals. The National part is also pin
compatible with the Intel part. I think the old Intel part # was 8277?
For new parts, I would use the National 8477, or the Intel 82077AA,
THese parts can handle the new 2.88mb floppy drives that never quite
got popular. They can also do perpendicular recording.
Tim Olmstead
webmaster of the CP/M Unofficial web page
http://cdl.uta.edu/cpm
Don Maslin
timo...@cyberramp.net wrote:
: Xiuhtecuht...@worldnet.att.net (Kolaga) wrote:
: >Can anyone tell me where to get data sheets for the 37C65 floppy disk
: >controller chip? I understand that it is a 765 chip with a built in
: >data separator and a few other external thingies built in.
: >Essentially, it's a one chip interface to the standard IBM floppy
: >diskette drives.
: >Who is the manufacturer? I'm interested in building a 6809 or 68008
: >based single board computer with a small chip count. OS's like
: >CUBIX or CP/M-68K interest me.
: Also, check out the National 8473, and the SMC37C65x family. A second
: source for the WD37C65 is Goldstar, who made a pin compatible version.
: I don't reccomend the 37C65 as it requires some nasty components; two
: sryctals, one of which is an odball freq., and four silver/mica caps.
: Also, you need to put 100ohm resistors in series with the TC, and IRQ
: lines that drive the bus. These pins have 48ma drivers on them, and
: they generate a LOT of ground bounce.
: The National part uses a single 24 mhz cyrstal, or oscillator module,
: and only a couple of simple crystals. The National part is also pin
: compatible with the Intel part. I think the old Intel part # was 8277?
Tim, are you sure? The 8473 is a 48 pin package.
: For new parts, I would use the National 8477, or the Intel 82077AA,
: THese parts can handle the new 2.88mb floppy drives that never quite
: got popular. They can also do perpendicular recording.
: Tim Olmstead
: webmaster of the CP/M Unofficial web page
: http://cdl.uta.edu/cpm
- don
Ulf Samuelsson
Don Maslin wrote:
>
> timo...@cyberramp.net wrote:
> : Xiuhtecuht...@worldnet.att.net (Kolaga) wrote:
>
> : >Can anyone tell me where to get data sheets for the 37C65 floppy disk
> : >controller chip? I understand that it is a 765 chip with a built in
> : >data separator and a few other external thingies built in.
> : >Essentially, it's a one chip interface to the standard IBM floppy
> : >diskette drives.
>
I don't know about you guys,
but I'd use a SuperI/O instead of a discreet Floppy Disk controller
If I wanted deliveries. Discreet Floppy disk controllers
are as dead as a dodo bird as far as we are concerned.
That means forget both DP8473 and 77,
gofor PC87xxx product which you will find on
http://www.national.com/
--
Ulf Samuelsson Mail: ulf.sam...@nsc.com
National Semiconductor AB Tel: +46 (8) 722-8050
Box 1009,S-121 23 Johanneshov GSM: +46 (708)722-813
SWEDEN Fax: +46 (8) 722-9095
Allison
timo...@cyberramp.net wrote:
>I don't reccomend the 37C65 as it requires some nasty components; two
>sryctals, one of which is an odball freq., and four silver/mica caps.
>Also, you need to put 100ohm resistors in series with the TC, and IRQ
>lines that drive the bus. These pins have 48ma drivers on them, and
>they generate a LOT of ground bounce.
The crystals are 9.6mhz (only needed for 1.2mb floppies) not that odd
and 16mhz a standards freq.
The two silver micas? what for I have the data sheet and there is no
requirement for them unless you talking about the oscillator
components for the 44pin flatpack.
The 48mA drie however is normal of all the floppy controllers that
have a direct bus interface for PCs.
Allison
Real address is: Allisonp @ world DOT std DOT com
++++BULK Email severely not wanted+++
timo...@cyberramp.net
>: The National part uses a single 24 mhz cyrstal, or oscillator module,
>: and only a couple of simple crystals. The National part is also pin
>: compatible with the Intel part. I think the old Intel part # was 8277?
>Tim, are you sure? The 8473 is a 48 pin package.
They also made a 40 pin dip package. It may not have been as popular
as the PLCC though.
Don Maslin
timo...@cyberramp.net wrote:
: >: The National part uses a single 24 mhz cyrstal, or oscillator module,
: >: and only a couple of simple crystals. The National part is also pin
: >: compatible with the Intel part. I think the old Intel part # was 8277?
: >Tim, are you sure? The 8473 is a 48 pin package.
: They also made a 40 pin dip package. It may not have been as popular
: as the PLCC though.
The 8473 DIP package on a couple of controllers that I have is 48 pin.
I never counted them on a PLCC :)
- don
: Tim Olmstead
David R Brooks
timo...@cyberramp.net wrote:
[snip]
:Also, check out the National 8473, and the SMC37C65x family. A second
:source for the WD37C65 is Goldstar, who made a pin compatible version.
:
:
:I don't reccomend the 37C65 as it requires some nasty components; two
:sryctals, one of which is an odball freq., and four silver/mica caps.
:Also, you need to put 100ohm resistors in series with the TC, and IRQ
:lines that drive the bus. These pins have 48ma drivers on them, and
:they generate a LOT of ground bounce.
:
SMC37C665 series (these are combo chips, with diskette, serial &
parallel ports) use a 24MHz crystal, and common 22pF caps. I don't
know if the data shhet is online (I have a paper copy: almost 200
pages). You can find an example circuit and (Z80) software on my
website: look for the "P112" stuff.
-- Dave Brooks <http://www.iinet.net.au/~daveb>
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