In most versions of DOS and Windows you can get a list of CPU Registers on x86 systems with Debug.
e.g.
C:\> Debug
-R
AX=0000 BX=0000 CX=0000 DX=0000 SP=FFEE BP=0000 SI=0000 DI=0000
DS=10AD ES=10AD SS=10AD CS=10AD IP=0100 NV UP EI PL NZ NA PO NC
10AD:0100 0000 ADD [BX+SI],AL DS:0000=CD