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From: dwoodwar@undeed.UUCP (Duncan S Woodward)
Newsgroups: sci.electronics
Subject: DUAL PORT MEMORY
Message-ID: <1139@undeed.UUCP>
Date: 17 Sep 90 21:48:13 GMT
Sender: dwoodwar@Daisy.EE.UND.AC.ZA (Duncan S Woodward)
Reply-To: dwoodwar@undeed.uucp (Duncan R Woodward)
Organization: Univ. Natal, Durban, S. Africa
Lines: 24

Hello,

Does anybody out there know of a reliable source / manufacturer of dual port
memory? I am looking for a device(s) that can implement a dual port memory
with at least 16 words (a word being 16 bits). The device(s) must contain the
complete arbitration logic to resolve simultaneous access to the same address
location, as well as logic to implement a semaphore system between either
side of the device(s) (ie writing to a specific location on PORT 1 will
generate an interrupt signal on PORT 2 and visa versa). I have looked at
various devices from Advanced Micro Devices (AM2130 [master] & AM2140
[slave]), and these are exactly what I want, however AMD have discontinued
the AM2140 which is required to build bus widths greater than 8 bits.

Does anyone know of other devices that could be used instead and who supplies
them?

Thanks in advance for any replies    

Duncan Woodward
Department of Electrical Engineering
University of Natal
Durban 4001
South Africa.
TEL / FAX. + 27 31 2617200