VT8601 Via, VT8601 Datasheet - Page 45

• Manufacturer Part Number: VT8601
• Description: Slot-1 / Socket-370 PCI North Bridge
• Manufacturer: Via

Device 0 Offset 59-58 - DRAM MA Map Type ............... RW
Device 0 Offset 5A-5F – DRAM Row Ending Address:
All of the registers in this group default to 01h:
Revision 1.3 September 8, 1999
15-13 Bank 5/4 MA Map Type (EDO/FPG)
11-8 Reserved
7-5
3-1
12
Offset 5A – Bank 0 Ending (HA[30:23]) .................... RW
Offset 5B – Bank 1 Ending (HA[30:23]) ..................... RW
Offset 5C – Bank 2 Ending (HA[30:23]) .................... RW
Offset 5D – Bank 3 Ending (HA[30:23]) .................... RW
Offset 5E – Bank 4 Ending (HA[30:23]) ..................... RW
Offset 5F – Bank 5 Ending (HA[30:23]) ..................... RW
Note :BIOS is required to fill the ending address registers
4
0
7HFKQRORJLHV ,QF
Bank 5/4 MA Map Type (SDRAM)
Bank 5/4 Virtual Channel Enable............. default=0
Bank 1/0 MA Map Type (see above)
Bank 1/0 Virtual Channel Enable............. default=0
Bank 3/2 MA Map Type (see above)
Bank 3/2 Virtual Channel Enable............. default=0
for all banks even if no memory is populated. The
endings have to be in incremental order.
:H &
:H &R R QQHFW
000 8-bit Column Address
001 9-bit Column Address
010 10-bit Column Address ..........................default
011 11-bit Column Address
100 12-bit Column Address (64Mb)
101 Reserved
11x Reserved
0xx 16Mb SDRAM .......................................default
100 64/128Mb SDRAM (x4, x8, x16, 4-bank x32)
101 64Mb VC SDRAM(x4)
110 64/128Mb VC SDRAM (8Mx8 or 8Mx16)
111 128Mb VC SDRAM (16Mx8)
QQHFW
........................................ always reads 0
-39-
(101) 6-bit Cola
(110) 7-bit Cola
(111) 8-bit Cola
Device 0 Offset 60 – DRAM Type ................................... RW
EDO/FP DRAM
SDRAM
VC SDRAM
Segment address {HA9,HA10,HA25,HA26} depends on VC
SDRAM configurations.
"PC" = "Precharge Control" (refer to SDRAM specifications)
16Mb 11x10, 11x9, and 11x8 configurations supported
64Mb x4: 12x10 4bank, 13x10 2bank
128Mb same as 64Mb
16Mb (0xx)
64Mb (100)
x4, x8, x16;
4-bank x32
VC SDRAM
VC SDRAM
VC SDRAM
10-bit Col
11-bit Col
12-bit Col
64M/128M
8-bit Col
9-bit Col
2/4 bank
7-6
5-4
3-2
1-0
2-bank
2-bank
2-bank
(000)
(001)
(010)
(011)
(100)
128M
64M
Table 4. Memory Address Mapping Table
MA: 13 12 11 10 9 8 7 6 5 4 3 2 1 0
MA: 13 12 11 10 9 8 7 6 5 4 3 2 1 0
MA: 13 12 11 10 9 8 7 6 5 4 3 2 1 0
x8: 12x9 4bank,
x16: 12x8 4bank,
x32: 11x8 4bank
Reserved
DRAM Type for Bank 5/4
DRAM Type for Bank 3/2.....................default=FPG
DRAM Type for Bank 1/0.....................default=FPG
00 Fast Page Mode DRAM (FPG).............. default
01 EDO DRAM (EDO)
10 Reserved
11 SDRAM
24
24
24 13 12 22 21 20 19 18 17 16 15 14 11 23
24 13 12
24 13 12 22 21 20 19 18 17 16 15 14 11 23
24 13 12
24 13 12 22 21 20 19 18 17 16 15 14 11 23
24 13 12
23 22 21 11 20 19
24 23 22 21 20
25 24 23 21
26 25 23
27 25
13
13
26
11
11
12
12
PC
PC
PC
24
23
24
22
PC
22
PC
........................................always reads 0
26 25 10 9 8 7 6 5 4 3
26 25 10 9 8 7 6 5 4 3
26 25 10 9 8 7 6 5 4 3
Device 0 Bus 0 Host Bridge Registers
22
21
22
21
22
21
24
21
26
VT8601 Apollo ProMedia
11
20
11
20
11
20
11
20
23
20
25
13x9 2bank
13x8 2bank
10
19
10
19
10
19
10
19
10
19
10
19
10
18
18
18
18
18
18
18
9
9
9
9
9
9
9
17
17
17
17
17
17
17
8
8
8
8
8
8
8
16
16
16
16
16
16
16
7
7
7
7
7
7
7
15
15
15
15
15
15
15
6
6
6
6
6
6
6
14
14
14
14
14
14
14
5
5
5
5
5
5
5
13
13
13
13
13
13
11
4
4
4
4
4
4
4
12
12
12
12
12
12
23
3
3
3
3
3
3
3
128M: 8Mx16
128M: 16Mx8
64M: 4Mx16
64M: 8Mx8
Row Bits
Col Bits
Row Bits
Col Bits
Row Bits
Col Bits
Row Bits
Col Bits
Row Bits
Col Bits
Row Bits
Col Bits
x4: 10 col
x8: 9 col
x16: 8 col
x32: 8 col
(13x6)
(13x7)
(13x7)
(13x8)