ADC after a BCS instruction[edit source]
- In a few special cases (such as immediately following a BCS), the carry is always clear in any situation where the CPU reaches the ADC instruction; this allows for leaving out the CLC, saving 1 byte and 2 machine cycles execution time.
describes following situation:
BCS greater_or_equal ; if not jumped here, after passing the BCS the carry is definitely in clear state! ADC #8
On the other hand, one can take advantage of a set carry too:
BCC less ; if not jumped here, after passing the BCC the carry is definitely in set state! ADC #7 ; adds 8 (7 + carry)
With this article, I'm implicitly suggesting the layout of this article as a general "template" for the 56 instructions (not including various addressing modes) – knowing that on the german wiki you have an article for each of the a-hundred-and-some instructions, including the addressing modes. Quite frankly, I believe my solution is just as easy to "approach" for the reader, whilst at the same time avoiding the "kludge" that comes from the inability to use the # character directly in article titles.
I have a database set up to "spit" out the articles in a short time, so before I do that and make subsequent policy changes that much harder, have your say...! – said BinaryDane 00:39, 7 November 2007 (CET)
- From my site its ok. You can release your database. --Sledgie 06:44, 8 November 2007 (CET)
- It's ok for me, but I'm not an expert in assembler... --Jodigi 17:04, 8 November 2007 (CET)
- Done! We now have articles on all 56 instructions covered in Commodore/Mos Technology's old documents :-D ... said BinaryDane 00:39, 9 November 2007 (CET)