r/wADRHEXADRNAMEDescriptionOS
write/read53774$D20EIRQEN, IRQSTInterrupt Request Enableall

Write#

BitFunctionVector
0Timer 1 (counted down to zero)VTIMR1 (528; $0210)
1Timer 2 (counted down to zero)VTIMR2 (530; $0212)
2Timer 4 (counted down to zero)VTIMR4 (532; $214 - OS "B" ROMs only)
3Serial output transmission downVSEROC (526; 020E)
4Serial Output data neededVSEROR (524; $020C)
5Serial input data readyVESRIN (522; $020A)
6Other key pressedVKEYBD (520; $0208)
7Break key pressed

Bit set to "0" (zero) turns interrupt off (disable) Bit set to "1" (one) turns interrupt on (enable)

Read#

BitFunction
0d
1d
2d
3d
4d
5d
6d
7d


see also: Keyboard topics