nvram

Hi, I am looking for 512k(64k x 8) nvram, but can't seem to source it. Does anybody have a link, assuming it exists? I found SPI chips, but I can't find parallel sram as nvram. p.s. I have this: ds1230y 256k(32k x 8) nvram. Thanks, Kei

Hi, I am using this circuit and software to write to the NVRAM: GitHub - crmaykish/AT28C-EEPROM-Programmer-Arduino: Programming the AT28C64B or AT28C256 EEPROM chip with an Arduino Mega In order to avoid the hassle of disabling Software Data Protection for writes to the 28c256 EEPROM, I...