What is jzdec?

Some articles on jzdec:

Counter Machine
... In the following the instruction "JZDEC ( r )" is a compound instruction that tests to see if a register r is empty if so then jump to instruction Iz, else if not then DECrement the ... z' appears to specify the next instruction after INC and as the alternative in JZDEC { INC ( r, z ), JZDEC ( r, ztrue, zfalse) } Program machine, Program computer, the names ... JZDEC is often split apart { INC ( r ), DEC ( r ), JZ ( r, ztrue )} Abacus machine, the name Lambek (1961) gave to his simplification of the Melzak (1961 ...