Conveying const pointer from 8051 C to ASM

Hi

Following code snippet:

------------C PROGRAM---------------------------

const unsigned int code TABLE1[4] = {1,2,3,4}; //constants stored in flash const unsigned int code TABLE2[4] = {5,6,7,8}; const unsigned int code TABLE3[4] = {44,33,44,33};

unsigned int *TableStart;

void main (void) {

TableStart = &TABLE1[0]; //get address of TABLE1[0] int_isr(); TableStart = &TABLE2[0]; int_isr(); TableStart = &TABLE3[0]; int_isr();

------------ASM PROGRAM---------------------------

EXTRN DATA (TableStart)

int_isr: mov A, #0 ;I want first byte in TABLEx mov DPTR, #TableStart ;get address of TABLEx mov A, @A+DPTR ;put first table value into ACC reti

END

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My aim is to dynamically send a TableStart address from a C program into an ASM interrupt handler (in my example above the ISR is called direct for the purposes of my question - I would normally connect int_isr to a real interrupt, with the C program "stuck" in a while(1) loop).

The result of the code above is that, in int_isr, the DPTR will end up with the address (in RAM) of the TableStart pointer. Instead, I want it to contain the contents of TableStart (which is the start address of the table). How can I achieve this?

Thank you Jack