Hi, frankly I never saw nor used this product, but as I was playing with Max II I was thinking that perhaps it would fit one of the altera cpld there is also the EPM7128SLC84-10N but its bigger (PLCC84) and about 4 times the price of the 7064S... perhaps that if there is a shortage of 6525 this method would work.... -- didier Le 26/07/2012 14:02, firstname.lastname@example.org a écrit : > I have already coded up the VHDL for a 6525 TPI running in MODE 0 only for the CBM II 8088 coprocessor. I have synthesised it for a XILINX > XC9572-7PC84 - but it could be synthesized for any other device if you have the necessary development tools. The CPLD I have used will > need to be enhanced if interrupts are to be supported as I have 'maxed out' the macrocell usage of the XILINX device with just mode 0 > supported. I have tested the device in the simulator - but not in reality (I do not have a 6525 chip to compare my code to or any > Commodore machine(s) to try it in). > > If you would like a copy of my VHDL code - please send me a PM and I will be glad to forward you the files. > > I would be more than happy to enhance the code to support the full functionality of the 6525 TPI device - but there are a few "grey areas" > in the device documentation that I have uncovered that we will need to try and 'plug' to ensure 100% compatibility. > > The biggest issue is the availability of 5V devices these days - as most manufacturers are moving to 3.3V or 1.8V devices. A small > daughter card with the requisite voltage regulator and level shifting buffers should solve this problem though. Any PCB guys out there > interested? > > Dave > > >> Message Received: Jul 26 2012, 11:45 AM >> From: "didier derny" <email@example.com> >> To: firstname.lastname@example.org >> Cc: >> Subject: just dreaming.... 6525.... CPLD ... replacement for 6525 >> >> Hi >> >> it's just a dream I had while I was reading the 6500 technical reference >> manual. >> >> recently you were looking for some 6525 to repair some equipement. >> apparently you never found the count of components you wanted .... >> >> any hope to build a replacement on a small board with a chip like >> EPM7064SLC44-10N >> >> I guess the 6525 is not too complicated .... ? >> the EPM7064SLC44-10N is 5V PLCC 44 not so expensive... >> >> perhaps it could be used on a small board >> >> something looking like a rom-el but to replace a 6525 ?? >> >> is it a problem of cost or an electrical problem ? >> >> >> -- >> didier >> >> >> >> >> >> >> >> >> >> >> >> >> > Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing listReceived on 2012-07-26 13:00:31
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