Version 1.2

This version replaces VCPI calls with VDS ones, which should enable transfer of data into non-contiguous memory managed by EMM386, Windows 3.x, or some other memory manager.

It also improves compatibility with SeaBIOS by backing up and restoring the port states when running IDENTIFY commands during initialization.

Version 1.1

Added ability to transfer data to non-word-aligned addresses, another missing feature of the Intel driver. This comes up a lot in actual usecases, it seems!

Initial release

Tested on MS-DOS 6.22 with ASUS "DRW-24D5MT" optical drive attached to "Micro-Star International Co., Ltd. [MSI] 9 Series Chipset Family SATA Controller [AHCI Mode] [1462:7918]".