Full On-Chip Memory

Hi Daixiwen,

Thank you for your reply, I appreciate it.

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When you do IOWR(ONCHIP_MEMORY2_1_BASE, 0x3fe, "THIS IS TO TEST HOW MUCH DATA CAN A MEMORY SPACE CONTAIN") you don't write the string to the onchip memory, you just write its address, which is a 32-bit word. The size of the string doesn't matter

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So where is the string stored in memory then? Is it the same case in writing bit streams? Where will the DATA be stored in the on-chip memory?

You said that I just write the 32-bit word address to the onchip memory, then what happens to the DATA?

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The IORD/IOWR macros read and write 32 bit words only, and it isn't an address that you give them, but a register number.

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It means that I have 1024 registers, each accessing 4 address spaces in the physical memory? Okay, then how many bits of data is stored in each byte address? it isn't 32bits I assume because FFF (4096) addressable spaces at 32 bits each would give 16,380 bytes of data, whereas the memory module is only 4096 bytes big.

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When you do IORD(ONCHIP_MEMORY2_1_BASE, 0x3fe), the actual addresses accessed are the 4 bytes at ONCHIP_MEMORY2_1_BASE+4*0x3fe to ONCHIP_MEMORY2_1_BASE+4*0x3fe+3 (0x00011ff8 - 0x00011ffb).

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What is the significance of this? Can you point me to what literature this is found?

Thank you very much.

Regards,