FIRMWARE LOADING SOFTWARE (G.P.S.CLOCK. MK IV). G.P.S.CLOCK – MK IVWindows 32/64 Bit. bit (No install) G.P.S.CLOCK flash tool from PRJC. Also available from PRJC Electronics:https://www.pjrc.com/teensy/teensy.exe G.P.S.CLOCK – MK IVApple MAC OS release 10.0 onwards. Also available from PRJC Electronics:https://www.pjrc.com/teensy/teensy.dmg G.P.S.CLOCK – MK IVUbuntu 32 Bit. G.P.S.CLOCK flash tool from PRJC. Also available from PRJC Electronics:https://www.pjrc.com/teensy/teensy_linux32.tar.gz G.P.S.CLOCK – MK IVUbuntu 64 Bit. G.P.S.CLOCK flash tool from PRJC. Also available from PRJC Electronics:https://www.pjrc.com/teensy/teensy_linux64.tar.gz G.P.S.CLOCK – MK IVRaspberry Pi 32 bit. G.P.S.CLOCK flash tool from PRJC. Also available from PRJC Electronics:https://www.pjrc.com/teensy/teensy_raspberrypi.tar.gz G.P.S.CLOCK – MK IVRaspberry Pi 64 bit. G.P.S.CLOCK flash tool from PRJC. Also available from PRJC Electronics:https://www.pjrc.com/teensy/teensy_linuxarm64.tar.gz G.P.S.CLOCK. FIRMWARE RELEASE's G.P.S.CLOCK – MK IVFirmware release 9.9_AUS_DLS1.zip Zip file, hex file (Firmware) within.Current firmware: It includes control for Australian DLS. Timezone resolution in steps of 5 mins. Several other bug fixes: RC210 RS232 symbol timing. RC210 not always returning from transparent mode. G.P.S.CLOCK – MK IVFirmware release 9.7.2 Zip file, hex file (Firmware) within.Stable release candidate. PROJECT DOCUMENTATION G.P.S.CLOCK – MK IVCurrent (9_9) User guide Standard .pdf format G.P.S.CLOCK – MK IVClock hardware dimensions (mm). Standard .pdf format.Please note all dimensions are in Millimeters (mm). G.P.S.CLOCK – MK IVLCD Dimensions (mm) Standard .pdf format.Please note all dimensions are in Millimeters (mm).