HP 9800 Series Desktop Computers - HPL Description

HPL Description

In HPL instead of variables such as A1 and J2, there were numbered registers r1, r2, up to r199999. This HPL program for the HP 9825 generates a list of prime numbers:

0: fxd 0 1: prt 1 2: prt 2 3: 1→P 4: for C=2 to 1000000 5: P+2→P 6: for N=3 to P/3 7: if int(P/N)*N = P; gto 4 8: next N 9: prt P 10: next C

Another unique characteristic of HPL was the right arrow (shown with ASCII characters as ->, however it was a single character). This arrow was known as the gazinta (slang for "goes into"). The statement 1→P would be pronounced "One gazinta P".

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