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Guy Harris (talk | contribs) Undid revision 1132621621 by John Sauter (talk) - not clear what the piping adds here. |
Guy Harris (talk | contribs) *This* is what Cewbot was complaining about; just link to big-endian, because there is no longer a section in endianness to link to for big-endianness. |
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==Memory==
Memory (''storage'') in System/360 is addressed in terms of [[8-bit]] bytes. Various instructions operate on larger units called ''halfword'' (2 bytes), ''fullword'' (4 bytes), ''doubleword'' (8 bytes), ''quad word'' (16 bytes) and 2048 byte storage block, specifying the leftmost (lowest address) of the unit. Within a halfword, fullword, doubleword or quadword, low numbered bytes are more significant than high numbered bytes; this is sometimes referred to as [[
The original architecture of System/360 provided for up to 2<sup>24</sup> = 16,777,216 bytes of memory. The later [[IBM System/360 Model 67|Model 67]] extended the architecture to allow up to 2<sup>32</sup> = 4,294,967,296<ref group=NB>Twice the size of the later System/370</ref> bytes of virtual memory.
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