Filter
Top Products
25
CHAPTER 3 REGISTERS
This flag is 1 when a two’s complement overflow occurs and is 0 when one does not as the result of an
operation.
•C flag
This flag is 1 when a carry or a borrow, from bit 7 in byte mode and from bit 15 in word mode, is
generated as the result of an operation but 0 in other cases. The shifted-out value is provided by the shift
instruction.
■ Access to Register Bank Pointer and Direct Bank Pointer
The upper byte of program status (PS), i.e. register bank pointer (RP) and direct bank pointer (DP), is
mapped to address 0078
H
. So it is possible to make read and write accesses to them by an access to address
0078
H
, besides using instructions that have access to PS (MOVW A, PS or MOVW PS, A).