Nextor v3 driver migration guide
This guide explains how to migrate a Nextor driver from v2 to v3. The reader is expected to have experience with Nextor v2 driver development.
Only the changes relative to the structure of the driver for v2 are mentioned here. You can see the skeleton for a full v3 driver in the
1. Change the hardcoded flags (DRV_FLAGS, 410Eh)
Nextor-v3-driver.asm in this same gist, and the skeleton for a full v2 driver in the Nextor repository.
The driver flags byte needs to be changed to the fixed value 83h. Bit 7 indicates that the driver is a v3 driver, bits 0 and 1 need to be set for consistency with the meaning they had in Nextor v2.