6.1.3 | DMA |
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|
|
|
| Hardware DMA | System Function |
| DMA 0 | Unused |
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|
|
| DMA 1 | Audio (Alternate = DMA 0 or 3) |
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|
|
| DMA 2 | Diskette Drive |
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|
|
| DMA 3 | ECP Parallel Port LPT1 (Default; Alternate = DMA 0) |
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|
|
| DMA 4 | DMA Controller Cascading (Not on ISA Bus) |
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|
|
| DMA 5 | Unused |
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|
|
| DMA 6 | Unused |
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|
|
| DMA 7 | Unused |
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|
|
6.1.4I/O
I/O Address (Hex) | System Function (Shipping Configuration) | |
000 - 00F | DMA Controller # 1 | |
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|
|
010 | - 01F | Unused |
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| |
020 - 03F | Interrupt Controller # 1 | |
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| |
040 - 043 | Counter/Timer | |
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|
|
044 | - 05F | Unused |
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|
|
060 |
| Keyboard Controller |
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|
|
061 |
| Port B |
|
| |
062 - 063 | Unused | |
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|
|
064 |
| Keyboard Controller |
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|
|
065 | - 06F | Unused |
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| |
070 - 071 | NMI | |
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|
|
072 | - 077 | CMOS Storage |
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|
|
078 | - 07F | Unused |
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| |
080 - 08F | DMA Page Registers | |
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| |
090 - 091 | Unused | |
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|
|
092 |
| Port A |
|
|
|
093 | - 09F | Unused |
|
| |
0A0 - 0BF | Interrupt Controller # 2 | |
|
| |
0C0 - 0DF | DMA Controller # 2 | |
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| |
0E0 - 0EB | Unused | |
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| |
0EC - 0ED | 483 Configuration Index/Data | |
|
| |
0EE - 0EF | 483 Fast A20/Fast Reset | |
|
| |
0F0 - 0F1 | ||
|
| |
0F2 - 0F3 | Unused | |
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| |
0F4 - 0F5 | 483 CPU Speed Slow/Fast | |
|
| |
0F6 - 0F8 | Unused | |
|
|
|
0F9 |
| 483/PGL Configuration Lock |
Continued
Compaq Deskpro EP Series of Personal Computers |
