En:RE: Parallel Port Ram Tester from Brazil!

Hello Folks !

The first part of the project, will make a Test Pattern, once the RS232 does not have enough speed to make a the Speed Test. Most of SRAM memories fail at this point...

It consists on fill all addresses with 0s, 1s and pattern like

0000000000
0000000001
0000000010
0000000100
0000001000
0000010000
0000100000
0001000000
0010000000
0100000000
1000000000
0100000000
0010000000
0001000000
0000100000
0000010000
0000001000
0000000100
0000000010
0000000001

And repeat at inverse way (0s in place os 1s and 1s in place of 0s)

The second part of the project, I'm planning to make on clock circuit (up to 20MHz) to make the Speed Test, filling all addresses with 0s and another test filling with 1s.

The software control, will be another important part of this project.

I hope to share experiences with you guys, and ALL comments will be very welcome !!!

I'm studing PIC microcontroles, and soon I hope to have one PCless tester :)

Thank you

José Luiz Martins

De:"joemagiera"

Para:

Cópia:

Data:Mon, 29 Dec 2003 17:11:04 -0600

Assunto:RE: Parallel Port Ram Tester from Brazil!

> Hi Luiz,
>
> Welcome to our list! I am extremely interested in this project, especially
> if it will thouroughly test 4116 and 4164 RAM. Any chance I could pay you
> to build an extra one for me?
>
> Are you planning on having the tester test RAM at different speeds also?
>
> Joe
> joemagiera@ameritech.net
>
> > -----Original Message-----
> > From: owner-techtoolslist@flippers.com
> > [mailto:owner-techtoolslist@flippers.com]On Behalf Of John Robertson
> > Sent: Monday, December 29, 2003 03:21 PM
> > To: techtoolslist@flippers.com
> > Subject: RE: Parallel Port Ram Tester from Brazil!
> >
> >
> > pc2jamma@terra.com.br
> >
> > Nice guy, he just emailed me the JPG and it is now on the FTP server...
> >
> > John:-#)#
> >
> > At 11:28 AM 29/12/2003, joemagiera wrote:
> >
> > >Can you please post Luiz email address? Would like to contact
> > him of

> > >
> > >Joe
> > >joemagiera@ameritech.net
> > >
> > > > -----Original Message-----
> > > > From: owner-techtoolslist@flippers.com
> > > > [mailto:owner-techtoolslist@flippers.com]On Behalf Of John Robertson
> > > > Sent: Monday, December 29, 2003 01:00 PM
> > > > To: techtoolslist@flippers.com
> > > > Subject: Parallel Port Ram Tester from Brazil!
> > > >
> > > >
> > > > One of our new members (Luiz) was attempting to post a note on a
> > > > project of
> > > > his, but it was too long (embedded JPG) and I think he might be
> > > > on vacation
> > > > (or something) so I'll edit and post it for him...(I've put his
> > > > schematics
> > > > in their own folder on the ftp site (RamTester)).
> > > >
> > > > Unfortunately I have been unable to extract the JPG from his huge
> > > > post...hoping he'll send it to me!
> > > >
> > > > John :-#)#
> > > >
> > > > -----------------------(original)---------------------------------
> > > > --------------
> > > >
> > > > Hello Folk!
> > > >
> > > > I decide to start building one PC (Parallel port) Based SRAM
> > > > Tester, after
> > > > some attempts to use old tester on fast
> > > > PCs with no success, and due to prohibitive prices of modern
> > one. For me,
> > > > in Brazil, it costs about 2,000 Dollars !!!!
> > > > The first part of this project is a simple 2114 Tester, and
> > the next step
> > > > will be accept 5101, 4116, 6116 and finally 6281. My target
> > is build one
> > > > TTL and CMOS Tester as well.
> > > >
> > > > I'll share with you guys this project, and I'll be very glad to hear
> > > > suggestions and answer all your questions.
> > > > Attached, you are receiving it's schematics, and this weekend
> > I'll write
> > > > it's code.
> > > >
> > > > I did this project as simple as possible, using one CD4040 (12 binary
> > > > Counter) to generate the address line, one 74LS245 (Octal Bus
> > > > Transceiver)
> > > > as data buffer and to protect the PC's RS232 port.
> > > >
> > > > Thank you for your t
reading this e-mail, and I'm sorry for the
> > > > grammatical errors !
> > > >
> > > > Luiz Martins
> > > > Paulo / Brazil
> > > >
> > > > How to subscribe or unsubscribe from TTL
> > > >
> > > > To do either you send email to "MajorDomo@flippers.com" and in
> > > > the body you
> > > > state either "Subscribe techtoolslist" or "Unsubscribe
> > > > techtoolslist", note
> > > > that the Subject is "" (Blank)...
> > > >
> > > > FTP site is: ftp://ftp.flippers.com/pub/TTL/
> > > >
> >
>
>

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Received on Mon Dec 29 21:39:39 2003