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View topic - Sega Game Gear Rom Dumper

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beyre
  • Joined: 14 Jun 2008
  • Posts: 22
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Sega Game Gear Rom Dumper
Post Posted: Tue Dec 02, 2008 8:56 am
Hi ive aquired 7 faulty game gears, now i am going to gut them for the cartridge slots to make a gg variant of the sms power dumper, now all i need is a circuit diagram prehaps a componet positional refrence system, for the location of parts also prehaps someone could update the instructions to have a working game gear dumper only, and the prize for makeing me the plans and instructions, is a gamegear rom dumper free of charge, shipped free of charge any where in the world

so get your thinking caps on

Ben
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beyre
  • Joined: 14 Jun 2008
  • Posts: 22
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Pin Outs
Post Posted: Tue Dec 02, 2008 9:06 am
i have found the gamegear cart pin outs

1 +34(V) liquid drive
2 +5(V) +5(V)
__
3 WR write signal
4 A12 address
5 A7/CL1B3 address
6 A6/CL1A2 address
7 A5/CL1B2 address
8 A4/CL1A1 address
9 A3/CL1B1 address
10 A2/DW address
11 A1/DO3 address
12 A0/DO1 address
13 D0/DB data
14 D1/P3 data
15 D2/P2 data
16 GND D ground
17 GND A ground
18 GND D ground
19 D3/P4 data
20 D4/P1 data
21 D5/CL2 data
22 D6/DO2 data
23 D7/DO4 data
____
24 MREQ memory request
25 A10/TPR2 address
__
26 RD read signal
_____
27 EXM 2 0~7FFFH
28 A15 address
29 A11 address
30 A9/TPR1 address
31 A8/CL1A3 address
32 A13 address
33 A14 address
_____
34 EXM 1 8000~BFFFH
35 +5(V) +5(V)
__
36 M1 M1 cycle
37 IORQ I/O request
____
38 RFSH refresh
_____
39 RESET reset
40 CCLK clock
41 GND ground
__
42 GG MS/GG
__
43 TV TV cartridge signal
44 TVSNDR TV's right channel
45 TVSNDL TV's left channel

now all i need to do is match them to the master systen pin outs, (ie what idd connect where to the other componets, on the master system dumper, just would not have the master system rom socket on it

so useing these instructions

http://www.smspower.org/smsreader/

can someone send me a new version for gamegear only please

thanks

Ben
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Maxim
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  • Joined: 19 Oct 1999
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Post Posted: Tue Dec 02, 2008 10:05 am
Don't be helpless.

http://www.smspower.org/dev/docs/wiki/Pinouts/GGCartridge
http://www.smspower.org/dev/docs/wiki/Pinouts/SMSCartridge

Connect things that are labelled the same. The SMSReader is build on veroboard which the GG connector will not fit on, so there's some work to do to make a suitable connection.

Alternatively, you can make a GG->SMS adaptor (GG cartridge port to SMS cartridge) and plug it into an SMSReader.
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beyre
  • Joined: 14 Jun 2008
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Post Posted: Wed Dec 03, 2008 9:20 am
Maxim wrote
Don't be helpless.

http://www.smspower.org/dev/docs/wiki/Pinouts/GGCartridge
http://www.smspower.org/dev/docs/wiki/Pinouts/SMSCartridge

Connect things that are labelled the same. The SMSReader is build on veroboard which the GG connector will not fit on, so there's some work to do to make a suitable connection.

Alternatively, you can make a GG->SMS adaptor (GG cartridge port to SMS cartridge) and plug it into an SMSReader.


any info would be appeciated on makeing a GG->SMS adapter, would be helpfull, :) many thanks

Ben
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Maxim
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Post Posted: Wed Dec 03, 2008 9:59 am
beyre wrote
any info would be appeciated on makeing a GG->SMS adapter


Maxim wrote
http://www.smspower.org/dev/docs/wiki/Pinouts/GGCartridge
http://www.smspower.org/dev/docs/wiki/Pinouts/SMSCartridge

Connect things that are labelled the same.
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beyre
  • Joined: 14 Jun 2008
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Post Posted: Wed Dec 03, 2008 3:13 pm
Maxim wrote
beyre wrote
any info would be appeciated on makeing a GG->SMS adapter


Maxim wrote
http://www.smspower.org/dev/docs/wiki/Pinouts/GGCartridge
http://www.smspower.org/dev/docs/wiki/Pinouts/SMSCartridge

Connect things that are labelled the same.


ok following your instructions i arive at this, i think this is correct, though the GG has 4 GND pins the SMS only 3 GND pins, so ive had to double up one pin

here is the pin outs ive made

GG PIN 1 (+37v) ***no corrosponding sms pin***
GG PIN 2 - SMS PIN 1 (+5v)
GG PIN 3 - SMS PIN 2 (WR)
GG PIN 4 - SMS PIN 33 (A12)
GG PIN 5 - SMS PIN 32 (A7)
GG PIN 6 - SMS PIN 31 (A6)
GG PIN 7 - SMS PIN 30 (A5)
GG PIN 8 - SMS PIN 29 (A4)
GG PIN 9 - SMS PIN 28 (A3)
GG PIN 10 - SMS PIN 27 (A2)
GG PIN 11 - SMS PIN 26 (A1)
GG PIN 12 - SMS PIN 25 (A0)
GG PIN 13 - SMS PIN 24 (D0)
GG PIN 14 - SMS PIN 23 (D1)
GG PIN 15 - SMS PIN 22 (D2)
GG PIN 16 - SMS PIN 21 (GND)
GG PIN 17 - SMS PIN 20 (GND)
GG PIN 18 - SMS PIN 19 (GND)
GG PIN 19 - SMS PIN 18 (D3)
GG PIN 20 - SMS PIN 17 (D4)
GG PIN 21 - SMS PIN 16 (D5)
GG PIN 22 - SMS PIN 15 (D6)
GG PIN 23 - SMS PIN 14 (D7)
GG PIN 24 - SMS PIN 13 (CE)
GG PIN 25 - SMS PIN 12 (A10)
GG PIN 26 - SMS PIN 4 (RD)
GG PIN 27 - SMS PIN 11 (M0-7)
GG PIN 28 - SMS PIN 36 (A15)
GG PIN 29 - SMS PIN 10 (A11)
GG PIN 30 - SMS PIN 9 (A9)
GG PIN 31 - SMS PIN 8 (A8)
GG PIN 32 - SMS PIN 7 (A13)
GG PIN 33 - SMS PIN 6 (A14)
GG PIN 34 - SMS PIN 5 (M8-B)
GG PIN 35 - SMS PIN 35 (+5v)
GG PIN 36 - SMS PIN 37 (M1)
GG PIN 37 - SMS PIN 38 (IOReq)
GG PIN 38 - SMS PIN 39 (Refresh)
GG PIN 39 - SMS PIN 46 (RESET)
GG PIN 40 - SMS PIN 47 (CLOCK)
GG PIN 41 - SMS PIN 20 (GND)
GG PIN 42 (GG) ***no corrosponding sms pin***
GG PIN 43 (TV) ***no corrosponding sms pin***
GG PIN 44 (TV R) ***no corrosponding sms pin***
GG PIN 45 (TV L) ***no corrosponding sms pin***
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Maxim
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Post Posted: Wed Dec 03, 2008 4:14 pm
Seems about right. All GND pins can be connected to each other; most carts do that anyway.

If you feel like making more of these I'm sure you could sell them for a fair price.

Note that the overlines on the pin designations is important - but they're all matching anyway. Also note that you won't get far with one of these adaptors plugged into a real system:


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beyre
  • Joined: 14 Jun 2008
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Post Posted: Wed Dec 03, 2008 5:25 pm
Maxim wrote
Seems about right. All GND pins can be connected to each other; most carts do that anyway.

If you feel like making more of these I'm sure you could sell them for a fair price.

Note that the overlines on the pin designations is important - but they're all matching anyway. Also note that you won't get far with one of these adaptors plugged into a real system:




your videos show its possibull, yet you said one wont get far lol what do you mean exactly

Ben
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Tom
  • Joined: 16 May 2002
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Post Posted: Wed Dec 03, 2008 5:53 pm
Besides the obvious palette problems, I guess Maxim said that because the Master System doesn't have a Start button, so you won't be able to start several games which require you to press it.

As long as you use it to dump games it would be fine, though.
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Maxim
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Post Posted: Wed Dec 03, 2008 6:04 pm
You can try it by writing a GG rom onto an SMS flashcart and patching the header. On the games I tried, it would either fail to get past the title screen (can't detect Start button being pressed) or it'd go into the game (since the SMS hardware appears to the game to have the Start button held down) and then pause immediately. Nothing was playable. The retina-burning colours make it nasty to look at. If the game has stereo music, that usually crashes the game because the hardware interprets it as a write to the memory control register, and promptly disables/enables ROM, RAM etc according to the stereo mix.
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beyre
  • Joined: 14 Jun 2008
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Post Posted: Wed Dec 03, 2008 8:59 pm
Maxim wrote
You can try it by writing a GG rom onto an SMS flashcart and patching the header. On the games I tried, it would either fail to get past the title screen (can't detect Start button being pressed) or it'd go into the game (since the SMS hardware appears to the game to have the Start button held down) and then pause immediately. Nothing was playable. The retina-burning colours make it nasty to look at. If the game has stereo music, that usually crashes the game because the hardware interprets it as a write to the memory control register, and promptly disables/enables ROM, RAM etc according to the stereo mix.

excludeing the games with stereo sound, would it not be possibull, to say hack a md controler on to the sms, (that way you have a start button) or is it due to the (hardware of the SMS, its self) idd be intrested to know your thoughts on this

(as you know the GG has TV pins on the cart slot, could one not just wire thoes to the RGB port of the master system, so it does the display though that (should give full colour out, as seen with the post of the GGTV hack useing the controler chips etc (since uk tvs are scart thus being RGB) it would be intresting if possibull, to make a unit sega never intended to make,

Ben
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beyre
  • Joined: 14 Jun 2008
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Post Posted: Wed Dec 03, 2008 9:03 pm
43 TV TV cartridge signal
44 TVSNDR TV's right channel (STEREO R)
45 TVSNDL TV's left channel (STEREO L)

44/45 are the left and right audio channels according to this and we know scart leads carry audio, so one could in theroy, wire pin 44 / 45 direct to the scart cable audio pins to put straight to the telly, whilst 43 (TV cartridge signal (is that the tv out pin) if so one could use that to the rgb port / or though a GGTV hack would have to recsearch that a bit more)

Ben
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Charles
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Post Posted: Wed Dec 03, 2008 9:44 pm
The TV, TVSNDL, and TVSNDR are inputs from the TV Tuner cartridge into the Game Gear. You can't use them to get audio or video output.

You can get stereo audio output from the headphone jack, and the "GGTV" RGB modification would be needed to get video output.
 
beyre
  • Joined: 14 Jun 2008
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Post Posted: Fri Dec 05, 2008 5:07 pm
i have aqquired 2 Diffrent SMS Converters for megadrive, note these are not the bulky md1 type, they are slimline, now i havent tryed these (with the sega transfer cable yet, but if they work, (it should work for all games) includeing GG games with a gg - ms converter this i will have to test when i get around to it

Ben
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