Talk:Accumulator (computing)

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Massive rework needed[edit]

This is bad, really bad.

First of all this article suggests an accumulator processors has one accumulator (which 6502 did). However numerous examples are contrary to this such as

  • 6809 has accumulators A and B that could be concatenated to D, 6308 had even more
  • 56300 has again 2 large accumulators of extended width
  • 96000 also has 2 accumulators that are even wider

With 2 accumulators you need only a single bit in the instruction to indicate what accumulator is to be used. 68000 has a lot of data registers, and those are not called accumulators, so the article should state clearly where the limit is. Seems the limit is around 4 (ARM Piccolo)

SWEET16 has one accumulator and 15 other registers, a wealth closer to 68000.

Next is the link to accumulator-based architecture which goes to PDP-8, specifically the section Legacy_of_accumulator-based_architectures which no longer exists. Is there any reason why this has to be split up?

Also it seems a bit lacking that the multiply-and-accumulate is not mentioned.

All in all an article in need of an overhaul. --22:47, 22 February 2009 (UTC) Amended --21:30, 23 February 2009 (UTC)

Hopefully such an overhaul will also disambiguate further, since the term "accumulator" in programming applies to a variable in which values are accumulated... 63.249.90.205 (talk) 00:55, 25 June 2010 (UTC)