My apologies for that, habit from the old days. So I jumped in without really knowing the application or what the challenges were, I assumed it was a "how to connect to something inside of something" type problem if you were to replace an internal eprom with a reprogrammable part and didn't want wires snaking out through the vent holes. What kind of app is this targeting? Cartridge, C64, or damm near anything? Is it a matter of getting hold of the R/W line and the host can participate in the reprogramming? Can the host be put into tristate reliably and something grab the buses, for example a 24 bit shift register driven by 2/3 wire? (Let the programmer do all of the magic byte stuff, the adapter just s/p translates). Twice the pins if you have to mux. I assume that anything that adds price at all is out of the range, you'd be looking a pin count for the address and data lines at a minimum price, whether done with TTLish shift registers or PAL/PGA/uProc. Too bad there isn't an AVR type with 512k flash. you think your talking to a mem, your really talking to a proc. Bil -----Original Message----- From: email@example.com [mailto:firstname.lastname@example.org] On Behalf Of Jim Brain Sent: Saturday, May 02, 2009 11:55 PM To: email@example.com Subject: Re: FLASH ROM replacement top-posting is bad, but we'll save that lesson for later. I wish they had such a thing, but alas, I've not found anything like it. Still, while SoftROM is a similar idea (uC + SD/USB + RAM to simulate a ROM), adding a uC and zigbee to this design would triple the cost or worse. But, if someone finds a combo Serial/Parallel SRAM, it would greatly simplify SoftROM implementation. I can only find this: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=AT45DB642D- CNU-ND Jim Bil Herd wrote: > Lol... I just assumed that someone made parallel flash/ee with an spi/I2C > backdoor. Damm 40 pin devices with 35 NC pins. > > > Message was sent through the cbm-hackers mailing list -- This message has been scanned for viruses and dangerous content by IDSi's MailScanner. Message was sent through the cbm-hackers mailing list
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