PORTIBM PC Portable (uses same BIOS as XT) 0080-008F - DMAsee Direct Memory Access PAGE REGISTERS (74612)

0080  RW  extra page register (temporary storage)
0081  RW  DMAsee Direct Memory Access channel 2 address byte 2
0082  RW  DMAsee Direct Memory Access channel 3 address byte 2
0083  RW  DMAsee Direct Memory Access channel 1 address byte 2
0084  RW  extra page register
0085  RW  extra page register
0086  RW  extra page register
0087  RW  DMAsee Direct Memory Access channel 0 address byte 2
0088  RW  extra page register
0089  RW  DMAsee Direct Memory Access channel 6 address byte 2
008A  RW  DMAsee Direct Memory Access channel 7 address byte 2
008B  RW  DMAsee Direct Memory Access channel 5 address byte 2
008C  RW  extra page register
008D  RW  extra page register
008E  RW  extra page register
008F  RW  DMAsee Direct Memory Access refresh page register