| //------------------------------------------------ |
| // imem.v |
| // James E. Stine |
| // February 1, 2018 |
| // Oklahoma State University |
| // ECEN 4243 |
| // Harvard Architecture Instr Memory (Big Endian) |
| //------------------------------------------------ |
| |
| module imem (mem_addr, mem_out); |
| |
| output [31:0] mem_out; |
| input [31:0] mem_addr; |
| |
| // Choose smaller memory to speed simulation |
| // through smaller AddrSize (only used to |
| // allocate memory size -- processor sees |
| // 32-bits) |
| parameter AddrSize = 16; |
| parameter WordSize = 8; |
| |
| reg [WordSize-1:0] RAM[((1<<AddrSize)-1):0]; |
| |
| // Read Instruction memory |
| // byte addressed, but appears as 32b to processor |
| assign mem_out = {RAM[mem_addr], RAM[mem_addr+1], |
| RAM[mem_addr+2], RAM[mem_addr+3]}; |
| |
| endmodule // imem |
| |
| |
