AM79C850 datasheet(68/97 Pages) AMD

68 / 97 page

AMD

P R E L I M I N A R Y

SUPERNET 3

Timer/Register

NPADDR

Default Value

Actual Time Value

MDREG1

10h

0080h

-NA-

MDREG2

20h

8000h

-NA-

MDREG3

60h

0000h

-NA-

STMCHN

11h

xxx0 0000 0000 0000b

Bits 15, 14, 13 are

for the revision

number.

FCNTR

41h

0000h

-NA-

LCNTR

42h

0000h

-NA-

ECNTR

43h

0000h

-NA-

FSCNTR

44h

0000h

-NA-

EACB, EARV1, EAS,

22h, 23h, 24h,

EAA0, EAA1, EARV2

25h, 26h, 6bh

unknown

-NA-

SACL, SABC

28h & 29h

unknown

-NA-

RPR1, WPR1, SWPR1

2dh, 2eh, 2fh

unknown

-NA-

RPR2, WPR2, SWPR2

68h, 69h, 6ah

unknown

-NA-

WPXS, WPXA0, WPXA1

30h, 31h, 32h

unknown

-NA-

SWPXS, SWPXA0, SWPXA1

34h, 35h, 36h

unknown

-NA-

RPXS, RPXA0, RPXA1

38h, 39h, 3ah

unknown

-NA-

MARR, MARW

3ch, 3dh

unknown

-NA-

WPXSF, RPXSF

2ah, 2bh

unknown

-NA-

FRMTHR

21h

0000h

-NA-

Notes:

*1 Lower 5 bits are all zero.

*2 Lower 5 bits are all one.

*3 Only lower 5 bits are valid.

AM79C850 Datasheet(PDF) 68 Page - Advanced Micro Devices

AM79C850 Datasheet(HTML) 68 Page - Advanced Micro Devices

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