Difference between revisions of "Dk'tronics Real Time Clock"
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| − | + | Contains a rechargeable battery, five chips, a quartz crystal, and a few odds and ends. | |
| + | The RTC chip is a HD146818 (which is also used in IBM PCs). | ||
== Info Fragment == | == Info Fragment == | ||
Revision as of 20:29, 6 January 2010
Contains a rechargeable battery, five chips, a quartz crystal, and a few odds and ends. The RTC chip is a HD146818 (which is also used in IBM PCs).
Info Fragment
Reportedly: DK-Tronics RTC module used a Z80-PIO chip to address the RTC itself as Port A of the PIO, with a 9-pin user i/o port as Port B.
I/O Ports
FBE0..FBE3 Dk'tronics Real Time Clock FBE8 Dk'tronics Real Time Clock
