On 27 Oct 2006 at 13:22, Ethan Dicks wrote:
* - for the uninitiated, the space char is the only
char in common
with ASCII, 0x20, and the numbers are 0xF0-0xF9 vs 0x30-0x39 for
ASCII.
Uh, Ethan? Space in EBCDIC is 0x40. And the letters are spaced the
same way (according to card code) as they were in the old BCD code:
C1-C9 "A' through "I" 12-1 through 12-9
D1-D9 "J" through "R" 11-1 through 11-9
E2-E9 "S" through "Z" 0-2 through 0-9
Which, as bizarre as it looks, made sense on a decimal machine like
the 7080--with the exception of a one-position gap between R and S,
the alpha characters were consecutive. On binary machines like the
S/360, there were larger "holes".
Punctuation is a lot harder to remember because the EBCDIC and BCD
card codes were different for several common characters. About the
only other thing I can recall is that 0-8-2 was a record mark in both
systems.
Cheers,
Chuck