i need an embedded c program that will read a 12 bit memory address from the io pins and output the data to pins from the memory in a 8051 microcontroller

i cant find any prewitten code and chat gpt doesnt do the job properly. 

this  is what i have so far from chat gpt:

#include <REG51.H>

unsigned char code memory_data[1024] = {
    // Optional data for testing
    0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88,
    // Continue filling if needed
};

void main(void) {
    unsigned int address;
    unsigned char data;
    unsigned char code *ptr;

    while (1) {
        // Read address from P1 (high byte) and P0 (low byte)
        address = ((unsigned int)P1 << 8) | P0;

        // Check if address is in bounds
        if (address < 1024) {
            ptr = memory_data + address;       // pointer into code memory
            data = *ptr;                        // read from code memory
        } else {
            data = 0xFF;  // Invalid address
        }

        // Output data to Port 2
        P2 = data;
    }
}

although this contains alot of errors. 

dd.c(11): error C141: syntax error near ';', expected '<id>'
dd.c(12): error C141: syntax error near 'unsigned', expected '__asm'
dd.c(20): error C202: 'ptr': undefined identifier
dd.c(21): error C141: syntax error near 'data', expected '__asm'
dd.c(21): error C202: 'ptr': undefined identifier
dd.c(23): error C141: syntax error near '=', expected 'hdata'
dd.c(27): error C141: syntax error near 'data', expected 'sizeof'

any ideas?