Re: How do I read a TI 18S42 with a Data I/O 29b/2b?

Thanks everyone! I read it last night as a NAT 74S472.

My Red Alert ROM/PROM set are identical to the set in MAME.

At 01:22 AM 5/6/2004, Rodger Boots wrote:
>David Fish wrote:
>>
>>Hmmm... 1980. The TI book I looked in was 1985. I'd guess
>>that the 18S42 was superceeded by the 28S42, the 28S42 is a
>>512 X 8 PROM w/3-state outputs and according to a enhanced
>>'Wiretap' file found at the link below, the 18S42 is the same. I
>>can't find any data on the 18S since my freetradezone account
>>expired.
>>
>
>The 18S42 was TI's new numbering for the 74S472 and the 28S42 was a
>similar part. They should all be readable using the 74S472
>codes. Datasheets are here for the
><http://www1.cedar-rapids.net/00000028/IHS/18S42.pdf>18S42 (just tells you
>it was a new part number for the 74S472),
><http://www1.cedar-rapids.net/00000028/IHS/28S42.pdf>28S42, and
><http://www1.cedar-rapids.net/00000028/IHS/74S472.pdf>74S472.
>
>
>>
>>
>><http://wulfman.com/pdffiles/rom95f-10.pdf>http://wulfman.com/pdffiles/rom95f-10.pdf
>>
>>The National Semiconductor 54/72S472 are ALSO 512 X 8
>>PROMs so there's a good chance that thier pinout is the same.
>>I don't have the data book for those handy right now.
>>The F/P code is 08/09 for these parts.
>>
>>*IF* you are only reading the PROM, and not trying to program one
>>there is a VERY good chance that either F/P code will work. The F/P
>>codes set the pinout configuration for the programmer along with
>>the MORE critical programming algorithms (voltage levels, slew rates,
>>pulse widths, repetitions and more). But since you are JUST reading
>>the device you should be OK with either.
>>
>>Standard static protection procedures (ground yourself before touching IC
>>and ground target through yourself before inserting IC) should be enough.
>>Although it never hurts to be MORE careful.
>>
>>Dave
>>----- Original Message -----
>>From: "Franklin Bowen" <mailto:Franklin@Bowen.net><Franklin@Bowen.net>
>>To: <mailto:techtoolslist@flippers.com><techtoolslist@flippers.com>
>>Sent: Wednesday, May 05, 2004 6:28 PM
>>Subject: Re: How do I read a TI 18S42 with a Data I/O 29b/2b?
>>
>>
>>
>>>
>>>Thanks Dave!
>>>
>>>J8048A
>>>TBP18S42N
>>>
>>>I looked at the schematics (this is from Red Alert, the Character board)
>>>and they label the part "S472". I did a search in the device files and
>>>found these 2 entries. Do you think they are a closer match than the
>>>
>>
>>28S42?
>>
>>>
>>>NAT 54S472 PROM DIP 008/009 V07
>>>
>>
>>C
>>
>>>
>>>NAT 74S472 PROM DIP 008/009 V07
>>>
>>
>>C
>>
>>>
>>>This is my first foray outside of EPROMs. Do I need to be MORE careful
>>>about static with PROMs?
>>>
>>>Thanks!
>>>
>>>
>>>At 01:53 PM 5/5/2004, David Fish wrote:
>>>
>>>>
>>>>I would try reading it as a TI 28S42 first, use F/P code 13/09.
>>>>I can't find the 18S42 in my old TI data books and it's not
>>>>listed on the D I/O wall charts either. It seems to be a very
>>>>obscure part. Is there a date code stamped on it?
>>>>
>>>>You're probably right about the 2B's revision being the last three
>>>>digits. Mine is 950-0086-006.
>>>>
>>>>Good luck,
>>>>Dave
>>>>
>>>>----- Original Message -----
>>>>From: "Franklin Bowen" <mailto:Franklin@Bowen.net><Franklin@Bowen.net>
>>>>To: <mailto:techtoolslist@flippers.com><techtoolslist@flippers.com>
>>>>Sent: Wednesday, May 05, 2004 12:27 PM
>>>>Subject: How do I read a TI 18S42 with a Data I/O 29b/2b?
>>>>
>>>>
>>>>
>>>>>
>>>>>How do I read a TI 18S42 with a Data I/O 29b/2b? I did a search
>>>>>
>>
>>through
>>
>>>>>
>>>>>the device files and found no match. A search on Google found this
>>>>>
>>>>
>>>>article:
>>>>
>>>>>
>>>>>
>>>>>
>>
>><http://groups.google.com/groups?selm=leD3a.129288%24vm2.77578%40rwcrnsc54>http://groups.google.com/groups?selm=leD3a.129288%24vm2.77578%40rwcrnsc54
>>
>>>>>
>>>>>So can I read this as a AMD 27S29, a device that the 2b supports?
>>>>>
>>>>>A couple unrelated questions:
>>>>>1) What is the A/C (last) column in the device lists?
>>>>>2) How do I tell the version number of my 2B? On everything else it's
>>>>>obvious. Is it the last 3 digits of the part number? So 950-0086-011
>>>>>would mean I have a version 11?
>>>>>
>>>>>Thanks!
>>>>>
>>>>>--
>>>>>Franklin Bowen (<mailto:Franklin@Bowen.net>Franklin@Bowen.net)
>>>>>http://fmbbowen.com:39353
>>>>>
>>>>>
>>>>>If you ever want to (un)subscribe yourself with TTL, you can send mail
>>>>>
>>
>>to:
>>
>>>>>
>>>>><mailto:Majordomo@flippers.com><Majordomo@flippers.com>
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>>>>>
>>>>
>>>>If you ever want to (un)subscribe yourself with TTL, you can send mail
>>>>
>>
>>to:
>>
>>>>
>>>><mailto:Majordomo@flippers.com><Majordomo@flippers.com>
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>>>>
>>>
>>>--
>>>Franklin Bowen (<mailto:Franklin@Bowen.net>Franklin@Bowen.net)
>>>http://fmbbowen.com:39353

--
Franklin Bowen (Franklin@Bowen.net)
http://fmbbowen.com:39353 
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