DIGITAL-LOGIC Microspace MSM586SEN Technical User Manual page 170

DIGITAL-LOGIC AG
I/O Ad- Read/Write
dress Status
0064h R
0064h W
0070h R
0071h R / W
0080h R / W
0080h R
0081h R / W
0082h R / W
0083h R / W
0084h R / W
0085h R / W
0086h R / W
0087h R / W
0088h R / W
0089h R / W
008Ah R / W
008Bh R / W
008Ch R / W
008Dh R / W
008Eh R / W
008Fh R / W
Description
Keyboard controller read status
bit 7 = 0 No parity error
1 Parity error on keyboard transmission
bit 6 = 0 No timeout
1 Received timeout
bit 5 = 0 No timeout
1 Keyboard transmission timeout
bit 4 = 0 Keyboard inhibited
1 Keyboard not inhibited
bit 3 = 0 Data
1 Command
bit 2 = System flag status
bit 1 = 0 Input buffer empty
1 Input buffer full
bit 0 = 0 Output buffer empty
1 Output buffer full
Keyboard controller input buffer
CMOS RAM index register port and NMI mask
bit 7 = 1 NMI disabled
bits 6-0 = 0 CMOS RAM index
CMOS RAM data register port
Temporary storage for additional page register
Manufacturing diagnostic port
checkpoints)
DMA channel 2 address byte 2
DMA channel 2 address byte 2
DMA channel 1 address byte 2
Extra DMA page register
Extra DMA page register
Extra DMA page register
DMA channel 0 address byte 2
Extra DMA page register
DMA channel 6 address byte 2
DMA channel 7 address byte 2
DMA channel 5 address byte 2
Extra DMA page register
Extra DMA page register
Extra DMA page register
DMA refresh page register
54
MSM586SEN/SEV Manual V1.5E
(this port can access POST
Continued...