Re: rom export table

32 KB of SRAM are not enough to use the network stack.

The following assembly code will access the ROM export table:

        ; Get the table address
        mov dptr, #0ff0002h
        clr a
        movc a, @a+dptr
        mov dpx1, a
        mov a, #1
        movc a, @a+dptr
        mov dph1, a
        mov a, #2
        movc a, @a+dptr
        mov dpl1, a
                                                                                                                                	; dptr1 now has the address of the table

	; Read first byte from table
	inc dps
        clr a
        movc a, @a+dptr

	; Read more .... ....
	; ...

	inc dps


Remember that you need a 24 bit assembler.

You don't have to do anything to map the ROM, it is at address 0ff0000h.

> From: Suneet Anil Deshmukh
> Sent: Tuesday, April 13, 2004 5:19 AM
>
> Sir/Madam
>
> We are using DS80C400 in our college project. We are not using the
> evaluation board. We have made our own board interfacing 80C400 with 64kb
> eprom and 32kb sram. Is this configuration sufficient for DS80C400 to work
> properly.
>
> We are using a 8051 assembler for coding purposes. We have been unable to
> get the starting address of the rom export table. We are also having
> problems with rom mapping despite following the ROM init procedure in the
> datasheet.
>
> Could you please help us with this problem. Thanks.
>
> Suneet Deshmukh,

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