Changes

Contains a following components: HD146818P ([[PC compatible RTC chip|PC-style RTC]]), a TMP[[Z80 PIO|Z84C20]]P ([[Z80 PIO]]), three logic chips74LS00 (Quad NAND), 74LS138 (demux), 74LS175 (4bit latch), 9pin male DSUB connector (used as an 8bit general-purpose I/O port (9pin male DSUB), and a rechargeable 3.6V battery.

Not sure if above addresses are correct, for example, A0 and A1 may be swapped. Uses a Z80 PIO chip to control the HD146818 RTC chip via port A.Do not use Port A as this will affect the RTC operation.?  FBE0h Dk'tronics Real Time Clock - [[Z80 PIO ]] Port A seems to be the plain Data ([[PC compatible RTC chip|HD146818P]] RTC Data Busbus) FBE1h Dk'tronics Real Time Clock - [[Z80 PIO]] Port B Data, there should be also used for external control (General Purpose 8bit I/O Port) FBE2h Dk'tronics Real Time Clock - [[Z80 PIO]] Port A Control FBE3h Dk'tronics Real Time Clock - [[Z80 PIO]] Port B Control FBE8h Dk'tronics Real Time Clock - Control port for RTC Read and Write signals, which are maybe found in the chip (4bit latch) '''(details unknown purpose)''' port? Port B is connected directly to a standard 9-way connector on the left of the interface.

* RSX.BAS (loader) and RSX.BIN (binary)- allows to change the time under BASIC, using following RSX commands** |SETTIME,yy%,mm%,dd%,dayofweek%,hour%,min%,sec%** |ASKTIME,@yy%,@mm%,@dd%,@dayofweek%,@hour%,@min%,@sec%** |POKERTC,index%,value%** |PEEKRTC,index%,@value%** |TIMEON,xpos%,ypos%,interval%** |TIMEOFF** |ALARMON,hour%,min%,sec%,flag%** |ALARMOFF* CLOCK.COM - installs the clock under CP/M+ (thereafter** Thereafter, it should be accessible with standard DATE command, and, it should add timestamps to files).** According to english manual, time is set by "CLOCK dd/mm/yy hh/mm/ss" rather than by using the DATE command (?)** Unknown how the timestamps are stored on disk? The normal AMSDOS filesystem / directory entries don't include timestamps. == Downloads == [[File:DkronicsRtcDriver.zip]] - none such** According german manual, something is (the startup message?) "Datomat RTC und Cdos sind Warenzeichen von CMS International" (=Datomat RTC and Cdos are trademarks of CMS International)

<gallerycaption="dk'tronics Real Time Clock - 464/664 version"> 

<gallery caption="dk'tronics CPC6128 Real Time Clock 300dpi scans by Robcfg- 6128 version">

[[Category:HardwarePeripherals]] [[Category:PeripheralsHardware]]