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H8

40 bytes added, 13:01, 18 May 2020
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=Architecture=
The basic architecture of the H8 was influenced by the [[Digital Equipment Corporation|DEC]] [[PDP-11]], with sixteen 8-bit registers (R0H, R0L, ..., R7H, R7L), with some instructons also accessible as eight 16-bit registers (R0 - R7), where R7 is the [https://en.wikipedia.org/wiki/Call_stack#STACK-POINTER stack pointer], 16-bit [https://en.wikipedia.org/wiki/Program_counter program counter], 8-bit condition code register (CCR) and a variety of addressing modes. Opposed to the PDP-11, H8 is a [[Big-endian|big-endian]] machine, since the upper 8 bits of a 16-bit word are stored at the even word address, the lower 8 bits at the odd address. The H8/300 has a [https://en.wiktionary.org/wiki/concise concise] set of 57 [https://en.wikipedia.org/wiki/Reduced_instruction_set_computing RISC]-like instructions, 2 or 4 bytes long <ref>[https://www.classes.cs.uchicago.edu/archive/2006/winter/23000-1/docs/h8300.pdf H8/300 Programming Manual] (pdf)</ref>. Arithmetic, logic, shift and bit manipulation instructions are performed as register-to-register operations, or with immediate data.
 
=H8 Chess Programs=
* [[:Category:H8]]
=Manuals=

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