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Reg

Tips: Rom Dumping

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G540.jpg

Of all the years I have been around Fruit Machine emulation, there is never a better feeling then to get some roms, dump them and then create a layout off your own back.  This was recently done with a fantastic little game from QPS tha we did not have the roms for - that layout will remain a mystery and be released soon.

Recently my new eBay roms arrived, so this time I decided to capture the process.

The costs are not too bad thanks to cheap Chinese imports.  For this, I brought a G540 rom dumper off eBay.  If I recall, I change change from £50.

The dumping process was as follows:

001 - Load the G540 utility for dumping the EPROM.  The below splash screen will appear.

001%20-%20Logo.bmp

002 - When loaded you are presented with the below screen.

002%20-%20Loaded.bmp

003 - You must first identify what EPROM you wish to dump, below are the original chips from Random Gold.

003%20-%20Chips.bmp

004 - The reader can read all types of chips, but you must do a little work to identify them yourself.  Very carefully remove the labels and for this example we are left with the following EPROM information.

R.GOLD 50p / £70 STD CRGAF5250 - M27C256B-15XF1 ( ST )
TMP50C20AP-2 UART SKT NO4 - M5L8251AP-5 ( Mitsubishi Electronics )
CASINO AUDIO - AM27C64 ( AMD )

004%20-%20Labels%20Removed.bmp

005 - For each EPROM you need to do the following steps.

  • Choose SELECT icon from the menu bar and pick the right manafacture and chip set. 

    A%20-%20Casino.bmp
     
  • Place the EPROM into the device as shown by the GUI.

    006%20-%20Chip%20Prompt.bmp

    005%20-%20EPROM%20in%20device.bmp
     
  • Choose READ icon from the menu bar. The display with either disapear or sometimes it shows you what it read.
     
  • Click SAVE and select BIN and choose a relevant filename.
     
  • If you have HxD you can view the saved file as per below.

    007%20-%20HxD.bmp
     
  • Repeat for all EPROMS.

006 - Note that the CASINO AUDIO eprom was easy to identify but with the others a little more work sometimes needs to happen.  You must get the exact chip.

This bit may take a little work as there are a "lot" to choose from.  If you need help, best to ask on the forums what is the best one to use there are plenty of people who have knowledge and can help you.

Datra sheets are available for all chips on the internet, attached are the three below that were easily found as an example.

AMD.pdf

Mitsubishi Electronics.pdf

SGS Thomson Microelectronics.pdf

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 "Maybe Reg is everywhere"                                                                                                                                                                                                                                              © 2020 Johnnyafc

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Test2.bin is Treasure Trail from Empire games at a rough guess.

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 "Maybe Reg is everywhere"                                                                                                                                                                                                                                              © 2020 Johnnyafc

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The Red Gaming version of Line-Up is MPU5, so the rom would be too small to be that.  128kb roms are normally MPU4, M1A or Impact.

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If you're pretty sure the roms came from a Line-Up machine you might need to reconfigure your rom reader/writer again and try a different setting.  It should be 512kb, if it's Line-Up.  I've never had a rom reader/writer, so I would struggle at the beginning as well, mate. :)

Edited by Ploggy
Typos

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2 minutes ago, Ploggy said:

If you're pretty sure the roms came from a Line-Up machine you might need to reconfigure your rom reader/writer again and try a different setting.  It should be 512kb, if it's Line-Up.  I've never had a rom reader/writer, so I would struggle at the beginning as well, mate. :)

It might now have. Im just grabbing chips and having a go :)


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Very good read, tnx guys,interesting to see and get a feeling for the process before layouts are created cheers Reg

oh btw Reg any little clues's as to what the new one is ;) lol

Edited by bungle

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13 minutes ago, spa said:

These look good to me, mate.  BGT's Max A Million, for anyone looking in.  Unemulated tech at the moment, but that doesn't matter one little bit.  Sounds were missing from the rom-dat, but not anymore!  Thanks for the dumps. :)

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A lot of MPU4 games software was on 27C512 chips.   The chip should have it printed on it, you just need to check under sticker.  Sometimes the print is fairly worn and it is rather small.

J

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What I need is OFAH sound rom. My machine plays them all wrong. Trouble is, I can't get into the machine as I have no room!

Sorry Reg, have clogged this thread up! Feel free to move :D

Edited by spa

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