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Section 5

Processors with stack memories (zero addresses per instruction)

This section contains only computers which use a stack memory in their Pc and hence are denoted Pc.stack. Although the implementation details differ, they are based on the common idea of a stack as described in Chap. 3, page 62. Several theory or language-based processors-IPL-VI and EULER-use a stack in Mp. However, for these language-based machines the stack is not the main design theme as it is with the other computers in Table 1. In fact, data in IPL-VI are organized (Chap. 30) about lists, which are a more general data structure than stacks. A stack permits push and pop operations to be performed on the top of the stack; a list permits push and pop operations to be performed on each cell of the list (they are then called insert

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