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Table 8-2
0026 H/0027 H
0040 H-0043 H
0044 H-004F H
0050 H-005F H
0060 H/0064 H
0061 H
0062 H
0063 H
0065 H-006F H
0070 H-0071 H
0072 H-007F H
0080 H-008F H
0090 H-0091 H
0092 H
0093 H-009F H
00A0 H-00A1 H
00A2 H-00BF H
00C0 H-00DF H
00E0 H-00EF H
00F0 H
00F1 H
00F2 H-00F3 H
00F4 H-00FB H
00FC H-00FF H
0100 H-016F H
0170 H-0177 H
0178 H-01EF H
01F0 H-01FF H
0200 H-020F H
0210 H-0277 H
0278 H-027F H
0280 H-02AF H
02B0 H-02DF H
02F0 H-02E7 H
PG 720 Programming Device
C79000-G7076-C720-02
I/O Address Assignments
I/O Addresses
Configuration data
Timer/counter 1 (8254)
Not used
Not used
Keyboard controller (8042)
Port B: Timer/loudspeaker/parity system bus/
RAM
Reserved
Reserved
Not fully decoded
Real-time clock (146818) NMI enable
Not used
DMA page register (74 612)
Not used
Port A: Fast reset, A20
Not used
Interrupt controller 2 (slave/8259A)
Reserved
DMA controller 2 (8237)
Not used
Numeric processor Cancel Busy
Numeric processor Reset
Not used
Not used
Numeric processor ('486)
Not used
Reserved (Winchester controller 2)
Not used
Winchester controller 1;
IDE interface of motherboard
Not used (game I/O)
Not used
Not used
Not used
Not used
Not used
Hardware Information
Chip/Module
Hardware
Interrupt Used
IRQ 0
IRQ 1, IRQ 12
NMI
IRQ 2
IRQ 13
IRQ 14
8-3
8
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