What are the memory limits of the various Acorn machines?
For the most part the 8 bit machines were limited to a maximum of around 256k of memory. Although various expansion systems including second processors effectively meant the upper limit was about 1 Meg. (Although I have been told of a second processor with 4 Meg of memory in it. ) For the early 32 bit machines the upper limit currently is 16 Meg of memory. Not all of the range of machines are capable of this however and the list looks something like this:- A3xx – 8 MB maximum through third party, 1 MB official limit. A4xx – 8 MB maximum through third party, 4 MB official limit. A4xx/I – 8 MB maximum through third party, 4 MB official limit. A3000 – 8 MB maximum through third party, 2 MB official limit. A540/R260/R225 – 16 MB maximum. A5000 – 8 MB maximum through third party, 4 MB official limit. A4 – 4 MB official limit. A30x0 – 4 MB official limit. A4000 – 4 MB official limit. A5000 – 8 MB official limit. (alpha variant of the A5000) A7000 – 128 MB + memory on mother board. (Tops out
