Figure 4–4 alphapc 164sx isa bus devices, 2 isa expansion slots, 3 isa i/o address map – Compaq 164SX User Manual

Page 48: Table 4–1 isa i/o address map (sheet 2 of 2), Isa expansion slots, Isa i/o address map, Alphapc 164sx isa bus devices, Isa bus devices, 2 isa expansion slots, 3 isa i/o address map

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Functional Description

ISA Bus Devices

Figure 4–4 AlphaPC 164SX ISA Bus Devices

4.3.2 ISA Expansion Slots

Two ISA expansion slots are provided for plug-in ISA peripherals (J22 and J23).

4.3.3 ISA I/O Address Map

Table 4–1 lists the AlphaPC 164SX ISA I/O space address mapping.

Table 4–1 ISA I/O Address Map

(Sheet 1 of 2)

Range (hex)

Usage

000-00F

8237 DMA #1

020-021

8259 PIC #1

040-043

8253 timer

060-061

Ubus IRQ12 and NMI control

sd[7:0]

PCI-to-ISA

Bridge

CY82C693U-NC

la[23:17]

PCI

sd[15:0]

Combination

Controller

37C669

Diskette

Parallel

COM1/2

ISA0

ISA1

sa[19:0]

sa[15:0]

Transceivers

EIDE – Primary

EIDE – Secondary