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Store bit flags on an 16bits memory

Santi Amo

Hi,

Anyone knows how to use bit flags using only 1 bit of each word of a 16bits RAM memory?, by this way, I can store 16 flags on each word.

I'm adapting an old 16bits program that used a bit a bit addresable memory, And I don't want to change all code using masks to emule a bit a bit addresable, and I don't wan't to use a 16bits word to only store a bit.

There are any software easy solution?

Thanks!!

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    struct {
    unsigned b0  : 1;
    unsigned b1  : 1;
    unsigned b2  : 1;
    unsigned b3  : 1;
    unsigned b4  : 1;
    unsigned b5  : 1;
    unsigned b6  : 1;
    unsigned b7  : 1;
    unsigned b8  : 1;
    unsigned b9  : 1;
    unsigned b10 : 1;
    unsigned b11 : 1;
    unsigned b12 : 1;
    unsigned b13 : 1;
    unsigned b14 : 1;
    unsigned b15 : 1;
} bit_addressable_memory;

#define my_first_old_bitname    bit_addressble_memory.b0
#define my_second_old_bitname   bit_addressble_memory.b1
#define my_third_old_bitname    bit_addressble_memory.b2
#define my_fourth_old_bitname   bit_addressble_memory.b3
#define my_fifth_old_bitname    bit_addressble_memory.b4

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    struct {
    unsigned b0  : 1;
    unsigned b1  : 1;
    unsigned b2  : 1;
    unsigned b3  : 1;
    unsigned b4  : 1;
    unsigned b5  : 1;
    unsigned b6  : 1;
    unsigned b7  : 1;
    unsigned b8  : 1;
    unsigned b9  : 1;
    unsigned b10 : 1;
    unsigned b11 : 1;
    unsigned b12 : 1;
    unsigned b13 : 1;
    unsigned b14 : 1;
    unsigned b15 : 1;
} bit_addressable_memory;

#define my_first_old_bitname    bit_addressble_memory.b0
#define my_second_old_bitname   bit_addressble_memory.b1
#define my_third_old_bitname    bit_addressble_memory.b2
#define my_fourth_old_bitname   bit_addressble_memory.b3
#define my_fifth_old_bitname    bit_addressble_memory.b4

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