|In this readme it talks about "DOS Mode", which I presume on has upgrade to Windows from DOS:|
Q: Does my sound card support pure DOS mode?
A: Not all ESS Technology sound cards support pure DOS mode. Pure DOS is called up when you boot your system to DOS 6.22 or Windows DOS 4.0 mode directly, instead of to the Windows desktop. For PCI sound cards, DOS mode is supported by their Windows 95/98 drivers in order to properly configure PCI resources in C:\CONFIG.SYS and C:\AUTOEXEC.BAT, and the DOS emulation is limited to IRQ5.
Q: Does the ESS Technology sound card support DOS box mode?
A: Yes. All ESS Technology sound cards support DOS box mode. In Windows, you launch the DOS box by double-clicking on the DOS icon. However, in Windows NT4/2000/XP, DOS-based programs and games are unable to access I/O port and resources directly in its (DOS) Command Prompt as in Windows 95/98/98SE/Me, thus audio function may not work in the Command Prompt window.