AM79C930 datasheet(67/161 Pages) AMD

67 / 161 page

P R E L I M I N A R Y

AMD

Am79C930

Am79C930 Device ISA Plug And Play Mode I/O MAP

Physical

ISA

SIR1

Resource

Location of

Resource Name

Mnemonic

I/O address

Bits [2:0]

Size

Resource

SIR0: General

SIR0: GCR

IOBA*+0000h

XXX**

1 byte

BIU

Configuration Register

SIR1: Bank Switching

SIR1: BSS

IOBA+0001h

XXX

1 byte

BIU

Select Register

SIR2: Local Memory

SIR2: LMAL

IOBA+0002h

XXX

1 byte

BIU

Address [7:0]

SIR3: Local Memory

SIR3: LMAU

IOBA+0003h

XXX

1 byte

BIU

Address [14:8]

SIR4: I/O Data Port [7:0]

SIR4: DPLL

IOBA+0004h

XXX

1 byte

Indirect access

to SRAM or

Flash memory

SIR5: I/O Data Port [15:8]

SIR5: DPLM

IOBA+0005h

XXX

1 byte

Indirect access

to SRAM or

Flash memory

SIR6: I/O Data Port

SIR6: DPUM

IOBA+0006h

XXX

1 byte

indirect access

[23:16]

to SRAM or

Flash memory

SIR7: I/O Data Port [31:24]

SIR7: DPUU

IOBA+0007h

XXX

1 byte

Indirect access

to SRAM or

Flash memory

TIR 0–7

–

IOBA+0008h –

000

1 byte

TAI

IOBA+000Fh

each location

TIR 8–15

–

IOBA+0008h –

001

1 byte

TAI

IOBA+000Fh

each location

TIR 16–23

–

IOBA+0008h –

010

1 byte

TAI

IOBA+000Fh

each location

TIR 24–31

–

IOBA+0008h –

011

1 byte

TAI

IOBA+000Fh

each location

Device does not respond

–

IOBA+0010h –

0XX

to these accesses

IOBA+0027h

Impossible programming of

1XX

SIR1 bits (SIR1[2] = 0

always in ISA Plug

and Play mode)

Plug and Play ADDRESS

PPA

0279h (fixed)

XXX

1 byte

BIU

Auto-Configuration Port

(write only)

Plug and Play WRITE_DATA

PPWD

0A79h (fixed)

XXX

1 byte

BIU

Auto-Configuration Port

(write only)

Plug and Play READ_DATA

PPRD

0203h – 03FFh

XXX

1 byte

Indirect access

Auto-Configuration Port

(relocatable)

to ISA Plug and

(READ ONLY)

Play register set

*IOBA = ISA Plug and Play I/O Base Address

**X = Don’t Care

AM79C930 Datasheet(PDF) 67 Page - Advanced Micro Devices

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