Some C Syntax

To allocate and initialize a table in assembly, you would do the following:

tbird:   .db   0x00,0x08,0x0C,0x0E,0x0F,0x00,0x10,0x30,0x70,0xF0

To allocate and initialize a table in C, you could do:

unsigned char tbird[10];

tbird[0] = 0x00;
tbird[1] = 0x08;
      .
      .
      .

unsigned char tbird[] = {0x00,0x08,0x0C,0x0E,0x0F,0x00,0x10,0x30,0x70,0xF0};

In C, array indices start at 0. Thus, to access the 0x0C element, you would refer to tbird[2].

To do a bitwise AND in assembly, you would load one of the operands into an accumulator and use the anda or andb instruction. For example,

    ldaa   PORTC
    anda   #0x03

To do the same in C, you would:

    PORTC & 0x03

Here are some more common operators in C: