mc6809

M m

Transcription

- US Pronunciation
- US IPA

- US Pronunciation
- US IPA

Definitions of mc6809 word

abbreviation Technical meaning of MC6809 Motorola 6809 3
noun Definition of mc6809 in Technology (processor) (MC6809) An eight-bit microprocessor from Motorola, Inc.. The 6809 was a major advance over both its predecessor, the Motorola 6800 and the 6502. The 6809 had two 8-bit accumulators, rather than one in the 6502, and could combine them into a single 16-bit register. It also featured two index registers and two stack pointers, which allowed for some very advanced addressing modes. The 6809 was source compatible with the 6800, even though the 6800 had 78 instructions and the 6809 only had around 59 (including a SEX instruction). Some instructions were replaced by more general ones which the assembler would translate and some were replaced by addressing modes. The 6809 had one of the first multiplication instructions of the time, 16-bit arithmetic and a special fast interrupt. But it was also highly optimised, gaining up to five times the speed of the 6800 series CPU. Like the 6800, it included the undocumented HCF (Halt and Catch Fire) bus test instruction. The Hitachi 6309 was a version with extra registers. The 6809 was used in the UK "Dragon 32" personal computer and was followed by the Motorola 68000. Lennart Benschop <[email protected]> posted a emulator (originally called "usim") and a cross-assembler to Usenet newsgroup alt.sources on 1993-11-03. Ray P. Bellis <[email protected]> released a version 0.11. 1

See all 2 definitions of mc6809

Information block about the term

Parts of speech for Mc6809

noun

adjective

verb

adverb

pronoun

preposition

conjunction

determiner

exclamation

Full grammatical hierarchy of Mc6809

See also

All definitions of mc6809

Was this page helpful?

Yes No

Thank you for your feedback! Tell your friends about this page

Tell us why?