Changes
/* Prices */
Refer to the [[UIDE_Universal_IDE_adapter_cards_for_Z-80_computers|uIDE CPC Wiki page]] for further details on connectivity options. You don't need uIDE-8 in order to use uRTC-8 but you will need to choose a way to connect it to your computer. PCWs can use Z80 shim or the expansion port adapter; other Z80 computers can use the Z80 shim.
=== Video Demonstrations ===
* Hardware description and Superbrain demo: https://youtu.be/POBRlgAFxmo
* PCW (CP/M Plus) demo: https://youtu.be/CDJlPLYHUEA
=== Pictures of the finished board ===
=== uRTC.COM ===
Download the latest variant that matches your host computer, rename to uRTC.COM and transfer to your computer. ==== Download link CP/M Plus variant ==== Version 0.2 https://drive.google.com/open?id=1biJngbF-HsDswufP4QZSDSKqk6e34a54 Version 0.1 https://drive.google.com/open?id=1Er7WKz09m9ctzeEk3jxSyDXjDc1OzInK Note: When you set the system time on the PCW (-t option), the second is always set to 0. ==== Superbrain variant ==== Version 0.2 https://drive.google.com/open?id=1UZq4VTQw32Y4G1tUflGlZpAKdPz19NY9
==== Usage ====
usage: uRTC - show date and time from the RTC clock"
uRTC [[dd/mm/yy] [hh:mm[:ss]]] [-ts|p] [-q] - set RTC day/date/time"
-tp t transfer uRTC date/time to CP/M Plus system clock" -ts transfer uRTC date/time to Superbrain host machine system clock"
-q quiet mode, reports errors only"
A>uRTC
Tue 18 Dec 2018 17:05:13
A>uRTC -tpt
CP/M Plus system time set: Tue 18 Dec 2018 17:05:13
You can combine functions as well; so for example
A>uRTC 19/12/18 -tpt
..would set the day of the week to Wednesday and the date to the 19th Dec 2018 on uRTC's clock, then transfer the new date and current uRTC time to the host computer's system clock.
==== Y2K handling ====
==== Setting the system time automatically on the PCW ====
Use the CP/M Plus / PCW version of uRTC.COM.
To automatically set the PCW system time, add the following line to the PROFILE.SUB file of the boot disk:
uRTC -tpt
Before first use, set the uRTC-8 clock time as shown in the usage section. Now, at each boot, the CP/M Plus system time is set automatically from the battery backed clock on the uRTC-8 board.
==== Setting the system time automatically on the Superbrain ====
Use the Superbrain version of uRTC.COM.
The Superbrain has no automatic boot command capability; however, if you are using uRTC-8 you can use the XSETCMD.COM program to set an initial boot command. The one you want is:
uRTC -tst
If you are not using uIDE-8 on your Superbrain, you will have to remember to enter the command manually each time you boot. Advanced users may patch the CCP on the boot disk directly to inject the command.
== Using timestamps with CP/M plus files ==
A full description of how to configure a CP/M Plus system for timestamps can be found on page 592 of the [[http://www.cpm.z80.de/manuals/cpm3-usr.pdf|the CP/M 3 user guide]].
In a nutshell:
== Prices ==
This is a summary of the prices I have posted to the forum so far.
I am sorry that the assembled prices are what they are, but it is a time consuming and dreary job, not to mention the effort and cost to acquire the parts. [Update Dec 2020] Sadly, the clock chip used in this design has become much more expensive (the last one I bought cost over £10) and there are many counterfeits coming out of China, so it is risky to buy cheaply from there. My last three orders of clock chips turned out to be fake parts - not one of them worked. So I have to buy from the expensive UK vintage chip suppliers. As a result, I have had to put the price of the uRTC up to compensate.
{| class="wikitable"
! Item !! Price
|-
| uRTC-8 assembled || £37£44.00
|-
| Z80 Shim assembled (LHS or RHS) || £17.50
