Re: Re: Addressing MVS control blocks from Hercules e.g. PSAAOLD/PSATOLD

Back in the 8080 8-bit days, the processor would
Byte 1: read the 78 of two numbers, add them, store into the result,
increment the address,
Byte 2: read the 56 of the two numbers, add them including the
overflow from the previous byte, store  the result,
Byte N: and repeat through the rest of the digits (34, 12),
End: if overflowed set the final overflow status.

On 8/19/08, Roger Bowler <rogerbowler@...> wrote:
>
> Just to complicate matters further, Intel pointers are
> "back-to-front", so for example 12345678 is stored in Intel storage as
> 78563412 (I gave up wondering why about 10 years ago :-))

--
Mike A Schwab, Springfield IL USA http://geocities.com/maschwab/ for
software links