An exception is the TBL instruction, which modifies the low byte while preserving bits 8 and 9.

For the low byte do the same, add 66 to 160, giving 226 or 0xE2.

STEVE: No, we've got 16 bits, and so the carry comes out of the low byte into the next byte.

Because XOR is linear, an attacker may be able to manipulate an encoded pointer by overwriting only the lower bytes of an address.

We're saying that we're going to have sort of a bit, maybe 256 bits, for, like, the lowest byte of the instruction.

These high and low bytes of the registers are sometimes referred to as Rn.0 (lo) and Rn.1 (hi).

In this mode, port C is multiplexed to carry both the lower byte of the address and data.

In this application, Port 0 outputs the low byte of the external memory address, time-multiplexed with the byte being written or read.

And then we OR this new character in, which essentially puts it into the lowest byte of this 32-bit register.

Because normally these routers will only NAT within the lower byte.