DIGITAL-LOGIC MSM800BEV, Техническое руководство пользователя

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DIGITAL-LOGIC AG
MSM800SEV/SEL/BEV/XEV/XEL Detailed Manual V1.7
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CMOS Map
continued...
Location Description
0Ch Status Register C
Bit 7 = Interrupt Flag
Bit 6 = Periodic Interrupt Flag
Bit 5 = Alarm Interrupt Flag
Bit 4 = Update Interrupt Flag
Bits 3-0 = Reserved
0Dh Status Register D
Bit 7 = Real Time Clock
0 Lost Power
1 Power
0Eh CMOS Location for Bad CMOS and Checksum Flags
Bit 7
= Flag for CMOS Lost Power
0 = Power OK
1 = Lost Power
Bit 6 = Flag for CMOS checksum bad
0 = Checksum is valid
1 = Checksum is bad
0Fh Shutdown Code
10h Diskette Drives
Bits 7-4 = Diskette Drive A
0000 = Not installed
0001 = Drive A = 360 kB
0010 = Drive A = 1.2MB
0011 = Drive A = 720 kB
0100 = Drive A = 1.44MB
0101 = Drive A = 2.88MB
Bits 3-0 = Diskette Drive B
0000 = Not installed
0001 = Drive B = 360 kB
0010 = Drive B = 1.2MB
0011 = Drive B = 720 kB
0100 = Drive B = 1.44MB
0101 = Drive B = 2.88MB
11h Reserved
12h Fixed (Hard) Drives
Bits 7-4 = Hard Drive 0, AT Type
0000 = Not installed
0001-1110 = Types 1-14
1111
= Extended drive types 16-44.
See location
19h.
Bits 3-0 = Hard Drive 1, AT Type
0000 = Not installed
0001-1110 = Types 1-14
1111
= Extended drive types 16-44.
See location
2Ah.
13h Reserved
Continued...