ACU Real Time Clock, DIY from magazine "[[Amstrad Computer User |Amstrad User]], April 85".
* The RTC chip doesn't include a Year register (aside from the leap-year shift register, but it can span only 4 years, and it is write-only).
== Article ==
<gallerycaption="Part 1 - RTC DIY Hardware (ACU April 1985)">
image:Amstrad Computer User8504 078.jpg
image:Amstrad Computer User8504 079.jpg
Observe that the part number, MM58147, in the headline is wrong (it's meant to be MM58174).
[[Category<gallery caption="Part 2 - Software for the RTC (ACU May 1985)">image:Hardware]] ACU8505-008.jpgimage:ACU8505-014.jpgimage:ACU8505-016.jpg</gallery> [[Category:Peripherals]] [[Category:DIY]]