data flash emulators

Remember the days when EEPROM emulators were being used as a way of
getting the code onto the target and executing the code on the target.
I was wondering if there is an equivalent for data flash which uses
today's popular protocal such as MMC style, SPI, I2C, microwire etc.

Any pointers would be handy.

Thanks in advance.

Tehn Yit Chin

Remember the days when EEPROM emulators were being used as a way of
getting the code onto the target and executing the code on the target.
I was wondering if there is an equivalent for data flash which uses
today's popular protocal such as MMC style, SPI, I2C, microwire etc.

Any pointers would be handy.

Thanks in advance.

Tehn Yit Chin