BLIT
PUT_RING(BLIT | SOURCE_COPY_BLIT | 4);
PUT_RING(BLIT | COLOR_BLT | 3);
PUT_RING(BLIT | MONO_SOURCE_COPY_IMMEDIATE | (4 + dsize));
#define dbg_blit(fmt, args...) do { printk(KERN_INFO BLIT fmt, ## args); } while (0)