On Oct 2, 20:38, Ram Meenakshisundaram wrote:
>
> [ Attachment (multipart/alternative): 2760 bytes ]
[please don't post multipart :-)]
> I hope that the firmware is downloaded to the chip each time it is fired
=
> up, but I am not sure. The chip is labelled as:
>
> TOSHIBA
> TC57H256D-70
> JAPAN 8906YAA
> VPP 12.5V
>
> Does anyone know what type of IC this is and where I can obtain one?
It's a standard 32768 x 8 CMOS EPROM, 70ns access time. I have the data
sheet if you really need it. Pinout is:
Vpp 1 28 Vdd
A12 2 27 A14
A7 3 26 A13
A6 4 25 A8
A5 5 24 A9
A4 6 23 A11
A3 7 22 ~OE
A2 8 21 A10
A1 9 20 ~CE
A0 10 19 D7
D0 11 18 D6
D1 12 17 D5
D2 13 16 D4
GND 14 15 D3
Like many devices of its time, it has an electronic signature, though it's
unlikely your circuit checks that. Anyway, the signature is obtained by
applying normal read voltage to all pins, except you apply 12V to A9. Then
with A0 at logic 1, you get the manufacturer code 0x98 and with A0=0 you
get device code 0x45.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
What are some of the default logins under VMS. Yes this is the first time
I've played with the beast.
BTW, how long does it take for DECUS to allow membership? I'm dying to
get the CD's which I can't until the membership is approved. And lastly
can I pop on a 3rd part SCSI drive on the uVax II?
--
Linux Home Automation Neil Cherry ncherry(a)home.net
http://members.home.net/ncherry (Text only)
http://meltingpot.fortunecity.com/lightsey/52 (Graphics)
http://linuxha.sourceforge.net/ (SourceForge)
I periodically poll the list to see if anyone has the following manuals
that I'm looking for. Been a long time, so here goes again :-) :
I have a couple of Mizar VMEbus Video boards, model 7710. Has anybody an
operator's/technical manual? Either an original or decent xerographic copy
will do. Has anybody written an OS-9/68K ver. 2.3 or 2.4 driver for this
thing? These are 1989 vintage.
I'm also looking for the following Motorola VMEbus Module manuals:
** MVME 236-1,2,3 (Publication number MVME 236-1 Dx ), DRAM memory module
(x = version or edition number. I'll take any version.)
** MVME 133-1 (Publication number MVME 133-1 Dx ), Processor module
** Support Docs manual for this processor: SIMVME133-1
** MVME134bug (Publication number MVME134bug Dx ), debugger manual
for '134 processor module
** Support Documentation (schematics, etc.) for an MVME147S which is
publication number SIMVME147S. Already have the manual.
** Xycom XVME 682 -which is a VMEbus PC/AT (Intel 286) processor module
** I'm also looking for Xycom catalogs and any tech documentation from
back in the mid-80's.
Thanks for your help!
Regards, Chris
-- --
Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA cfandt(a)netsync.net
Member of Antique Wireless Association
URL: http://www.antiquewireless.org/
I know, I should ask info-vax. But I'm not subscribed there :-(
I changed the nodename on my DSSI drive (looks like an HSC50 to the VAX)
and it still boots VMS but SYS$SYSDEVICE is set to $24$DIA264 not the
newer, more friendly SYSTEM$DIA0: I tried doing an autogen but that didn't
seem to change anything :-). Clues?
--Chuck
>I haven't looked at these very close yet, but aren't the heads in the
>drive, not the disk pack?
Correct.
>
>The only damage I can imagine is the bearings and/or races got munged
>up...
I was meaning after you spun the disk up the first time. Even if you did
not hear or smell anything. All to often you will not hear a head crash but
you can smell the burning. Usually however with RL02's you will hear a ting
stype of sound when they are crashing.
Dan
>
>clint
>
>
>On Mon, 2 Oct 2000, Daniel T. Burrows wrote:
>
>> >I recently purchased a number of RL02 cartridges. Some are labeled:
>> >RL02K-DC and some RL02K-EF.
>> >
>> >What's the difference between them?
>>
>> The -EF were error free.
>>
>> >
>> >One had one side of the shock indicator set, a second had both set.
>> >
>> >Would it be a really bad idea to use either of these, or just a bad
>> >idea?
>>
>> Depends of how brave you are.:)
>> Clean the heads first anyway.
>> Inspect them closely for any dings. Especially on the edges of the
>> platters. Then be ready to spin the drive down if you hear anything when
it
>> first loads.
>> Then inspect the heads again for oxide whether you heard anything or not.
>>
>> Dan
>>
>>
>>
>>
Sorry but it has no probes, these will have to be scavenged for. Its in
pretty good shape and easily meets the 10 year rule. Probes aren't too hard
to find if you look carefully. Anyway, its free for the cost of shipping it
somewhere, or if you are near Sunnyvale California (94087) then you can
just pick it up.
--Chuck
From: Ram Meenakshisundaram <rmeenaks(a)olf.com>
TOSHIBA
TC57H256D-70
JAPAN 8906YAA
VPP 12.5V
Does anyone know what type of IC this is and where I can obtain one? I
would love to install this on my IPX and connect my T805-30MHz Xplorer to
it. Thanks
it's an Eprom or 256kbits size (27C256 class part). Likely 28 pins? The
giveaway is the Vpp
(programming voltage). Also it sounds like a special version with a 70ns
access time.
Allison
>I recently purchased a number of RL02 cartridges. Some are labeled:
>RL02K-DC and some RL02K-EF.
>
>What's the difference between them?
The -EF were error free.
>
>One had one side of the shock indicator set, a second had both set.
>
>Would it be a really bad idea to use either of these, or just a bad
>idea?
Depends of how brave you are.:)
Clean the heads first anyway.
Inspect them closely for any dings. Especially on the edges of the
platters. Then be ready to spin the drive down if you hear anything when it
first loads.
Then inspect the heads again for oxide whether you heard anything or not.
Dan
Would anyone happen to have a Windows driver for the Mouse Systems
optical mouse that they could spare?
Thanks
Charlie Fox
Charles E. Fox
Chas E. Fox Video Productions
793 Argyle Rd. Windsor N8Y 3J8 Ontario Canada
(519)254-4991, Fax (519)256-3388 foxvideo(a)wincom.net
Check out: The Old Walkerville Virtual Museum at
http://skyboom.com/foxvideo and Camcorder Kindergarten at
http://chasfoxvideo.com
