The file TP43.S19, TP44.S19 and TP45.S19 in PATCHES contains a patch to make the emulator keep proper time for VersaDOS 4.3, 4.4 and 4.5.

It replaces the timer interval 15 with 55 and branches around the .625 MS adjustment.

This is needed because the emulator can ONLY produce periodic interrupts that are multiples of 55ms. So, even though VersaDOS sets the timer interval to 15 ms with .625 adjustment, the emulator interrupts every 55 ms.

To use HOT PATCH....

You should boot VersaDOS 4.3 and then when the request for session 1 login occurs... STOP the emulator and then Load Memory with the file TP43.S19.. then RUN the emulator. 

Respond normally to the login request. 

NOTE - Interrupt can still be lost, so the time is not reliable. 

The time displayed on the status at the bottom of the Screen/Keyboard form is read from the emulation of the RTC not the TIME OF DAY in Versados. 

WARNING - the HOT PATCHes are for the distribution system load modules... If you do a sysgen, you may need to make changes. The timer interrupt might get moved to a different address.