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dumper
Joined: 10 Aug 2007
Posts: 8
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 Posted: Fri Aug 10, 2007 8:55 am Post subject: Game Doctor SF7 RAM PINOUT |
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RCON1 RCON2
1.GND 1.GND
2.GND 2.GND
3.DQ1 3.OE
4.DQ0 4.WE
5.DQ2 5.A3
6.DQ3 6.A2
7.WE 7.A1
8.OE 8.A0
9.RAS 9.A9
10.CAS 10.A10
11.A11 11.A8
12.N.C. 12.CAS
13.OE 13.A6
14.WE 14.A7
15.DQ2 15.A4
16.DQ3 16.A5
17.DQ1 17.WE
18.DQ0 18.OE
19.VCC 19.VCC
20.VCC 20.VCC |
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dumper
Joined: 10 Aug 2007
Posts: 8
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| Posted: Fri Aug 10, 2007 8:56 am Post subject: |
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| Code: | RCON1 RCON2
1.GND 1.GND
2.GND 2.GND
3.DQ1 3.OE
4.DQ0 4.WE
5.DQ2 5.A3
6.DQ3 6.A2
7.WE 7.A1
8.OE 8.A0
9.RAS 9.A9
10.CAS 10.A10
11.A11 11.A8
12.N.C. 12.CAS
13.OE 13.A6
14.WE 14.A7
15.DQ2 15.A4
16.DQ3 16.A5
17.DQ1 17.WE
18.DQ0 18.OE
19.VCC 19.VCC
20.VCC 20.VCC
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kyuusaku
Joined: 26 Jul 2003
Posts: 941
Location: .ma.us
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| Posted: Fri Aug 10, 2007 8:01 pm Post subject: |
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There must be more to it since your pinout only supports 32M. Maybe pin 12 is /CE for the high 32M in 64M boards?
Can you label which chip /OE and /WE each go to? Or are they all connected?
Maybe you should also label the data pins to match the SNES, not the RAM (not important functionally but aesthetically.) |
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dumper
Joined: 10 Aug 2007
Posts: 8
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| Posted: Sat Aug 11, 2007 5:45 am Post subject: |
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Thanks for your reply.
Yes,this is 64Mb board.I use four KM44C4104CK chips,pin 12 not connect anywhere.
By the way,I put Gamestations's BIOS on GD7,it need some jumper.
Power on GD7,screen display "waiting".I think if make a IDE interface,GD7
can work with IDE CD-ROM.
The Gamestations's IDE interface have three chips,include a 18CV8 chip,this chip can readable?
 Mr.kyuusaku, can you email to me a CD7's SCH? I have a Cd7,but interface PCB have problem.I want make a new PCB.
My email address: mk.chow@126.com or dumperk@gmail.com
Thanks a lot.
 Sorry my bad english.
Last edited by dumper on Sun Aug 12, 2007 5:19 am; edited 1 time in total |
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dumper
Joined: 10 Aug 2007
Posts: 8
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| Posted: Sat Aug 11, 2007 9:21 am Post subject: |
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| Code: |
rcon1 GDSF-701 32Mb RAM board(4Mb X 4)
1 GND
2 GND
3 47 DQ1
4 50 DQ0
5 43 DQ2
6 45 DQ3
7 54 /WE
8 65 /OE
9 60 RAS
10 62 CAS
11 72 A11
12 N.C
13 63 /OE
14 52 /WE
15 44 DQ2
16 46 DQ3
17 48 DQ1
18 51 DQ0
19 VCC
20 VCC
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| Code: |
rcon2 gdsf701
1 GND
2 GND
3 66 /OE
4 55 /WE
5 86 A3
6 87 A2
7 88 A1
8 89 A0
9 74 A9
10 73 A10
11 75 A8
12 62 CAS
13 77 A6
14 76 A7
15 85 A4
16 84 A5
17 53 /WE
18 64 /OE
19 VCC
20 VCC
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| Code: |
rcon3 gdsf-701
1 GND
2 GND
3 47
4 50
5 42
6 45
7 58 /WE
8 69 /OE
9 60
10 62
11 72
12 N.C
13 67 /OE
14 56 /WE
15 43
16 46
17 48
18 51
19 VCC
20 VCC
rcon4 gdsf701
1 GND
2 GND
3 70 /OE
4 59 /WE
5 86
6 87
7 88
8 89
9 74
10 73
11 75
12 62
13 77
14 76
15 85
16 84
17 57 /WE
18 68 /OE
19 VCC
20 VCC
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So,the chip GDSF-701 pinout:
| Code: |
CNR1 CNR2
/WE 52 53 54 55 56 57 58 59
/OE 63 64 65 66 67 68 69 70
Data Bus
43 44 45 46 47 48 50 51
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dumper
Joined: 10 Aug 2007
Posts: 8
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| Posted: Sat Aug 11, 2007 9:47 am Post subject: |
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 So,GDSF-701 support 4Mb X 8bit single chip RAM? |
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kyuusaku
Joined: 26 Jul 2003
Posts: 941
Location: .ma.us
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| Posted: Sun Aug 12, 2007 4:26 pm Post subject: |
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| dumper wrote: | Thanks for your reply.
Yes,this is 64Mb board.I use four KM44C4104CK chips,pin 12 not connect anywhere.
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That is a 64M board? OK, I see how it works now. Sadly /CE is always active which means power is always used...
| dumper wrote: | By the way,I put Gamestations's BIOS on GD7,it need some jumper.
Power on GD7,screen display "waiting".I think if make a IDE interface,GD7
can work with IDE CD-ROM.
The Gamestations's IDE interface have three chips,include a 18CV8 chip,this chip can readable?
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No, the 18CV8 is not readable. To add IDE support in GDSF7, you must install that circuit inside the GDSF7, it cannot be used externally because it does not convert IDE->MKE. The 18CV8 (same as GAL16V8) decodes registers for the IDE bus.
| dumper wrote: | :idea: Mr.kyuusaku, can you email to me a CD7's SCH? I have a Cd7,but interface PCB have problem.I want make a new PCB.
My email address: mk.chow@126.com or dumperk@gmail.com
Thanks a lot.
:oops: Sorry my bad english. |
Sorry, I don't have the CD7 schematic, I'm sure somebody here must have it and can send to you.
| dumper wrote: | | :?: So,GDSF-701 support 4Mb X 8bit single chip RAM? |
Yes, it must support 4 x 32M x 8bit DRAM. It can only support 32M chips because 11 address lines x 2 (row / column) = 22. 2 ^ 22 = 32M. To make a 8-bit bus, it uses 2x 4-bit DRAM but it's not necessary. I think true 8-bit DRAM is hard to find though. |
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dumper
Joined: 10 Aug 2007
Posts: 8
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| Posted: Tue Aug 14, 2007 8:30 am Post subject: |
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This is 64Mb card,it is too..... but it can work yet.
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