Arithmetic Operations
All arithmetic operations are performed in the operating registers M, A and R. An arithmetic
operation is performed in two phases:
1. The contents of the selected register are automatically transferred to the M
register. The M register is selected automatically if no other register Is Indicated.
2. The operation Is carried out in the M, A and R registers
Programma 101 can perform these arithmetic operations: +, -, X, +, V. and absolute value.
Figures are accepted and computed algebraically. A negative value is entered by depressing
the negative key at any time during the entry of a figure. If there is no negative indication. the
computer will accept the figure as positive.
The Subtract operation key is separate from the numeric keyboard and is used exclusively for
subtraction.
These operations are described in detail in the following pages.
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