RelativeIt is possible to add a given value to the Program Counter (PC) to compute a jump relative to the current instruction; this is termed a "relative branch".
The relative addressing mode can in turn be direct (if the offset value is given by the operand) or indirect (if it is given by a register).
Examples:
jpr 0x0004 ; PC=PC+4 (Relative Direct) coding: 208b 0004
jprx e ; PC=PC+e (Relative Indirect) coding: 259b
Notice that the terms "direct" and "indirect" are not entirely appropriate since data has been given immediately and by a register respectively. However, since the data in question represents an address, we think that "direct" and "indirect" are more intuitive in this case.
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Homebuilt CPUs WebRing
JavaScript by Qirien Dhaela
Join the ring?
David Brooks, the designer of the Simplex-III homebrew computer, has founded the Homebuilt CPUs Web Ring. To join, drop David a line, mentioning your page's URL. He will then add it to the list.
You will need to copy this code fragment into your page.
Project start date: May 13 of 2009
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