>... the bootstrap loader is virtually the same as DOS ... >HALinNY wrote one of those once (for the IBM 360) - that really was getting down to the nitty gritty. Not everyone realised it but you could punch hex machine code into an 80 col card by hand; the machine was hard wired to read in iirc 40 bytes and execute it. 40 bytes of machine code was just about enough to write a 'channel' program to read the remaining 40 bytes followed by the next card. IBM supplied pre-written 'lace punched' cards to duplicate a card deck or print a card deck. I wrote one to do both (amazing things these computers!!!). I am prepared to wager as much as a couple of pints that it's not possible to get more functionality on one 80 col card <bg>
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