In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Aime wrote:

Dear Assaff,

We are still continuing with the testing and verification. So far we are synthesizing the soft core on a spartan 3-400 in 
which the block rams are used to implement the 4K ROM. This is done on fly by generating the memory content in VHDL from an HEX file. 
Without optimization the max speed is 112 MHz.  Our intention is to have different flavours of the SX 52 Soft core (with ROM of 4K, 8K, 16K,  64K, and why not  256K for Virtex chips ) that can be generated on fly. We have also in mind to extend the soft core for parallel flasm/Ram and serial EEprom interfacing.
 
Regards,

Aime

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