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Hardware Information
Table 7-2
Address
From
0000
0020
002E
0040
0060
0061
0063
0064
0070
0071
0080
00A0
00B2
7
00C0
00F0
0100
0170
01F0
0200
0278
02F0
02F8
0300
0320
0340
0360
0370
0376
0377
0378
0380
03A0
03B0
03BC
03C0
03D0
7-4
I/O address assignment
Size
Function
to
Byte
Basic Function
000F
16
PiiX DMA 1
0021
2
PiiX PIC 1 (interrupt controller)
002F
2
Configuration port Ultra I/O
0043
4
PiiX Timer1 (SW clock/refresh/speaker)
0060
1
Keyboard controller date
0061
1
PiiX NMI, speaker control
0063
1
Write-only PG configuration port
0064
1
Keyboard controller CMD/STATUS
0070
1
PiiX NMI enable, RTC Index
0071
1
RTC date
008F
16
PiiX DMA page register
00A1
2
PiiX PIC2 interrupt controller
00B3
2
PiiX power management control, status
00DE
31
PiiX DMA 2
00F0
1
Reset numeric error
010F
16
Not used
0177
8
Secondary IDE channel
01F7
8
Primary IDE channel
020F
16
Game I/O expansion card
027B
4
LPT 2 not used
02F7
8
GBIP adapter expansion card
02FF
8
COM2
031F
32
Programming equipment can be switched off
in SETUP
033F
32
Not used
035F
8
HighGraph (CPU) host interface expansion
card
036F
16
PC-Net expansion card
037F
16
0376
1
Second IDE command
0377
1
Second IDE status
037F
8
LPT 1
038F
16
SDLC 2 expansion card
03AF
16
SDLC 1 expansion card
03BB
12
B/W monitor interface / VGA
03BF
4
LPT x not used
03CF
16
VGA control register
03DF
16
CGA / VGA control register
Possible Alternative Function
Otherwise vacant
Otherwise vacant
Then vacant
(XT hard disk), SCSI adapter
(AHA1540B)
Otherwise vacant
Otherwise vacant
Floppy 2 not used
Otherwise vacant
Otherwise vacant
Not used
PG 760 Programming Device
C79000-G7076-C761-01
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