31 Aug
2010
31 Aug
'10
9:25 a.m.
Does anyone have some info in the Texas Instruments SN75413 ? I am
trying to restore the front panel controls of an early Tandy Radio Shack
hard disk (8 MByte!), but cannot find this chip info. The reverse
engineered diagram is at
http://www.xs4all.nl/~fjkraan/comp/trs80m2/driverboard.png, but as I do
not have the pin functions, I cannot connect the lamp and switch part
(this bit is missing) to the board.
There is some info on Radio Shack hard disks online, but not for this
old model. For some more context of the board see
http://www.xs4all.nl/~fjkraan/comp/trs80m2/8megDisk.html.
Fred Jan
31 Aug
31 Aug
9:44 a.m.
On 31 Aug 2010 at 18:25, F.J. Kraan wrote:
Does anyone have some info in the Texas Instruments
SN75413 ? I am
trying to restore the front panel controls of an early Tandy Radio
Shack hard disk (8 MByte!), but cannot find this chip info. The
reverse engineered diagram is at
http://www.xs4all.nl/~fjkraan/comp/trs80m2/driverboard.png, but as I
do not have the pin functions, I cannot connect the lamp and switch
part (this bit is missing) to the board.
There is some info on Radio Shack hard disks online, but not for this
old model. For some more context of the board see
http://www.xs4all.nl/~fjkraan/comp/trs80m2/8megDisk.html.
Took me less than 30 seconds to find it on www.datasheetarchive.com.
Basically the same as the 75403 dual peripheral driver, but with a
maximum voltage rating of 55 volts.
--Chuck
9:48 a.m.
On 8/31/10 12:25 PM, F.J. Kraan wrote:
Does anyone have some info in the Texas Instruments
SN75413 ? I am
trying to restore the front panel controls of an early Tandy Radio Shack
hard disk (8 MByte!), but cannot find this chip info. The reverse
engineered diagram is at
http://www.xs4all.nl/~fjkraan/comp/trs80m2/driverboard.png, but as I do
not have the pin functions, I cannot connect the lamp and switch part
(this bit is missing) to the board.
There is some info on Radio Shack hard disks online, but not for this
old model. For some more context of the board see
http://www.xs4all.nl/~fjkraan/comp/trs80m2/8megDisk.html.
Sent as attachment in private mail. (lazy today)
-Dave
--
Dave McGuire
Port Charlotte, FL
2:18 p.m.
On Tuesday 31 August 2010, Dave McGuire wrote:
Sent as attachment in private mail. (lazy today)
Email isn't a file transfer service!!!
Sorry, I couldn't resist. :)
Pat
--
Purdue University Research Computing --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
2:23 p.m.
On 8/31/10 5:18 PM, Patrick Finnegan wrote:
It certainly isn't. I was feeling rather lazy, as I said. ;)
Sent as
attachment in private mail. (lazy today)
Email isn't a file transfer service!!! Sorry, I couldn't resist. :)
I'll get you one of these days! ;)
-Dave
--
Dave McGuire
Port Charlotte, FL
3 Sep
3 Sep
11:11 a.m.
On 8/31/2010 5:23 PM, Dave McGuire wrote:
On 8/31/10 5:18 PM, Patrick Finnegan wrote:
It certainly isn't. I was feeling rather lazy, as I said. ;)
Dave,
Sorry for the late reply.
But I just noticed that your "get you"/"haunt you" list seems to be
getting bigger by the day. :)
Do you maintain this in a spreadsheet? Using Excel, of course. :)
Keith
Sent as
attachment in private mail. (lazy today)
Email isn't a file transfer service!!! Sorry, I couldn't resist. :)
I'll get you one of these days! ;)
-Dave
11:41 a.m.
On 9/3/10 2:11 PM, Keith M wrote:
It certainly isn't. I was feeling rather lazy, as I said. ;)
Sorry for the late reply.
But I just noticed that your "get you"/"haunt you" list seems to be
getting bigger by the day. :)
Well, it's long, but I've been mellowing with age, so new additions
are infrequent. ;)
Sent as
attachment in private mail. (lazy today)
Email isn't a file transfer service!!! Sorry, I couldn't resist. :)
I'll get you one of these days! ;) Do you maintain this in a spreadsheet? Using Excel, of
course. :)
Shit, I use a heavily-indexed database with custom query tools! ;)
-Dave
--
Dave McGuire
Port Charlotte, FL
5006
days inactive
5009
days old
6 comments
5 participants
participants (5)
-
cclist＠sydex.com -
fjkraan＠xs4all.nl -
keithvz＠verizon.net -
mcguire＠neurotica.com -
pat＠computer-refuge.org