12 Jan
1999
12 Jan
'99
2:17 a.m.
> Nop - or better partly correct - it is true that
not every punch
> combination was legel (that would be 4096 possible) but at least
> there was a legal combination for any possible 8-Bit combination.
> Otherways I would have been impossible to boot from a punch card
> reader !
Still wrong.
Not all machines that had card readers could boot from cards, and even
the ones that could do so didn't necessarily have a 256-character set
(or 8-bit bytes).
For instance, the IBM 1401, which typically was booted
from cards, but
had only 64 distinct characters.
Shure ? the 1401 is a bit before my time, but didn't they
already use 12 row cards with EBCDIC coding (like 12,1 to
12,9; 11,1 to 11,9 and 0,2 to 0,9 for A-i; J-R and S-Z) ?
Gruss
H
--
Ich denke, also bin ich, also gut
HRK