10 May
2015
10 May
'15
3:18 a.m.
On 2015-05-10 10:56, Robert Jarratt wrote:
I recall back in the late 70s using an IBM 029 Card
Punch to punch cards for
the DECSYSTEM-20.
As I understand it, the 029 was an EBCDIC machine, but of course the
DECSYSTEM-20 was ASCII.
Does that mean there was an ASCII version of the 029, or that there was
something in the card reader software on TOPS-20 that converted EBCDIC to
ASCII?
Punched cards are actually not EBCDIC. Nor are they ASCII.
That said, yes, the card reader driver needs to translate the card
encoding into ASCII when reading cards.
Johnny