If so, how does 1474560 become 1.44M, not 1.47M?
The only way is to mix the terms, and use 1024000 as a meg! That is
NEITHER the power of ten, NOR the power of two. In addition, it is NOT
what they then use to measure memory!
Heck, I don't know about PCs... they do strange things. In pdp-11
land, we all talked about powers-of-two for memory and disk space,
and knew full well that the actual count of bytes was going to be
different.
1 Kb is 1024 bytes. 64 Kb is 65536 bytes. 128 Kb was 131072 bytes.
and so on...
Worked the same way for disks... RT-11 architectural limit for a
disk volume is 32 Mbytes. That's
65536 (blocks) * 512 (bytes)
---------------------------- = 32 Mb
1024 * 1024
It all just seemed to work properly *in the ole days*, PCs screwed
things up... :-)
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work):
gentry!zk3.dec.com |
| Unix Support Engineering Group | (home):
mbg!world.std.com |
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| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
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