MediaWiki:Sitenotice:
2025-12-29: I have restored the wiki to a backup from the end of November. Starting in September 2025, accesses went form the 800MB-1.2GB range per month to 26GB in September, 42GB in October, and 70GB in November with most accesses originating from China. As soon as I realized what was causing all the access problems in November, I shut it down (it had reached 36GB by then) behind a password/login screen. The database had gotten corrupted, and I tried a restore from just before the spike in access but that didn't work. Thus, end of November. I still have the other daily backups so if there were any important additions in December, let me know and maybe they can be recovered. - Allen H.
6809: Difference between revisions
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[[Image:6809.jpg|thumb|320px|The Motorola 6809EP from the CoCo 1 & 2]] | |||
The Motorola '''6809''' is the central processing unit (CPU) of the CoCo. | The Motorola '''6809''' is the central processing unit (CPU) of the CoCo. | ||
It is | It is an 8/16-bit microprocessor, and is considered to be one of the best 8-bit CPUs ever. | ||
In the CoCo 1 and 2, the 6809EP, 1MHz rated variant is used. This indicates '''E'''xternal clock, and '''P'''lastic encapsulated. | In the CoCo 1 and 2, the 6809EP, 1MHz rated variant is used. This indicates '''E'''xternal clock, and '''P'''lastic encapsulated. | ||
In the CoCo 3, the 68B09EP is used, this part rated up to 2 MHz. It can be replaced by the Hitachi 6309 | In the CoCo 3, the 68B09EP is used, this part rated up to 2 MHz. It can be replaced by the Hitachi 6309 | ||
[[Image:68B09.jpg|thumb|320px|The Motorola 68B09EP inside the CoCo 3]] | |||
Latest revision as of 23:47, 25 April 2008
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This page was last updated on 04/25/2008. Total Pages: 747. Total Files: 997.
The Motorola 6809 is the central processing unit (CPU) of the CoCo.
It is an 8/16-bit microprocessor, and is considered to be one of the best 8-bit CPUs ever.
In the CoCo 1 and 2, the 6809EP, 1MHz rated variant is used. This indicates External clock, and Plastic encapsulated.
In the CoCo 3, the 68B09EP is used, this part rated up to 2 MHz. It can be replaced by the Hitachi 6309
