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Game Doctor SF7 RAM PINOUT

 
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dumper



Joined: 10 Aug 2007
Posts: 8

PostPosted: Fri Aug 10, 2007 8:55 am    Post subject: Game Doctor SF7 RAM PINOUT Reply with quote

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

PostPosted: Fri Aug 10, 2007 8:56 am    Post subject: Reply with quote

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

PostPosted: Fri Aug 10, 2007 8:01 pm    Post subject: Reply with quote

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

PostPosted: Sat Aug 11, 2007 5:45 am    Post subject: Reply with quote

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?

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.
Embarassed 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

PostPosted: Sat Aug 11, 2007 9:21 am    Post subject: Reply with quote

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   

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   

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   


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

PostPosted: Sat Aug 11, 2007 9:47 am    Post subject: Reply with quote

Question So,GDSF-701 support 4Mb X 8bit single chip RAM?
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kyuusaku



Joined: 26 Jul 2003
Posts: 941
Location: .ma.us

PostPosted: Sun Aug 12, 2007 4:26 pm    Post subject: Reply with quote

dumper wrote:
Thanks for your reply.

Yes,this is 64Mb board.I use four KM44C4104CK chips,pin 12 not connect anywhere.

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?

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

PostPosted: Tue Aug 14, 2007 8:30 am    Post subject: Reply with quote

Embarassed This is 64Mb card,it is too..... but it can work yet.


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