dwoodwar@undeed.UUCP (Duncan S Woodward) (09/18/90)
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
wayned@wddami.spoami.com (Wayne Diener) (09/21/90)
>In article <1139@undeed.UUCP> dwoodwar@undeed.UUCP (Duncan S Woodward) writes: >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 Integrated Device Technologies 3236 Scott Boulevard Santa Clara, CA 95054-3090 (408) 727-6116 - FAX (408) 727-3468 Makes a line of dual port rams incuding semaphores and/or interrupts with complete handshaking/hold-off arbitration logic. All the parts are 8 bits wide, but most of them come in pairs with both master and slave parts available for building 16, 24, 32, ... bit dual port systems. (These are fully static CMOS parts with read, write and chip select logic much the same as say a 6264 or a 43256.) --- |---------------------------------------------------------------| | // Wayne D. Diener | | // Spokane, WA | | \\ // E-mail reply to: | | \X/ To: isc-br!hawk!wddami!wayned@uunet.uu.net |
kthompso@entec.Wichita.NCR.COM (Ken Thompson) (09/26/90)
With a couple external gates one can use a 2130 as a slave. I have done it. But NCR says I cannot deal with South Africa. Ask AMD. -- Ken Thompson N0ITL NCR Corp. 3718 N. Rock Road Wichita,Ks. 67226 (316)636-8783 Ken.Thompson@wichita.ncr.com
kthompso@entec.Wichita.NCR.COM (Ken Thompson) (09/26/90)
We had nothing but grief with the IDT parts! -- Ken Thompson N0ITL NCR Corp. 3718 N. Rock Road Wichita,Ks. 67226 (316)636-8783 Ken.Thompson@wichita.ncr.com