Atmel has serial EEPROMS (AT24Cxx series). Available types are: AT24C01 -> 1 Kbit AT24C02 -> 2 Kbit : AT24C512 -> 512 Kbit AT24C1024 -> 1 Mbit and they're cascadable for bigger configurations. Roel You are in an empty cave. There's a rock in the middle with "Marko Mäkelä wrote on 08/22/2001 12:01:15 PM" written on. A hollow voice says: >On Wed, 22 Aug 2001, Rainer Buchty wrote: > >> But since the C64 already needs a few seconds to be fully initialized >> the serial method shouldn't be noticeable anyway. > >Unless the chip is used as a buffer between the 5-volt cartridge port and >the low-voltage memory chips, and the on-cartridge ROM is used for booting >the C64. > >It seems that the smallest chip in this Xilinx Spartan-II family (XC2S15, >100 pins) could otherwise do the job. I wonder if there are easy-to-use >serial ROM chips that could be programmed multiple times. The XC17S00A >family is one-time programmable. There is the XC18V00 family, but >apparently it is meant for the Virtex family (XC2V00 series) that might >not have 5-volt tolerant chips. > >How long does it take to initialize the logic? The XC17S15A PROM meant >for the XC2S15 CPLD can hold 197696 bits of data. The maximum speed seems >to be 10 megabits per second. At that speed, it would take 20 >milliseconds to boot the logic. That should be acceptable. The DONE >signal could even be wired over a diode to the RESET input of the >cartridge port, so that the system cannot start up too early. > > Marko > > > Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing list
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