Important: This guide is for 171-5797 rom boards ONLY. It is the System 16B rom board that has a custom Sega QFP IC marked 315-5250 (see pic!)
Golden Axe Conversion Guide for 171-5797 Rom Board 1.0 - by Cpsystem3
Games that use rom board 171-5797:
Toryumon
E-Swat
MVP
Golden Axe (duh)
Difficulty level to perform conversion:
2 out of 10, experience with programming eproms required. No soldering neccessary.
Materials required:
Eprom programmer with ability to do 32pin eproms
8x 27c2001 eproms
4x 27c010 eproms
1x 27c256 eprom
1x 68000 12mhz CPU **Only needed if a stock 68000 12mhz CPU is not already installed at C7
1x Z80 CPU **Only needed if a stock Z80 is not already installed at D15
"goldnaxe" Mame Rom Set (parent rom set, encrypted)
"goldnaxeud" Mame Rom Set (decrypted USA program roms)
Step 1:
Carefully remove all of the existing mask roms from your rom board. I prefer to use a small blade screwdriver and carefully pry each side until the chip is free. Be extremely careful you do not go too far into the socket, and gouge the PCB!
Step 2:
Set all of the jumpers as follows:
S1 - Short
S2 - Open
S3 - Open
S4 - Short
S5 - Open
S6 - Short
S7 - Short
S8 - Open
S9 - Short
S10 - Open
S11 - Short
S12 - Open
S13 - Open
S14 - Short
S15 - Open
S16 - Short
Step 3:
Burn the eproms and install in the following locations.
27c020 - bootleg_epr-12542.ic1 - IC1
27c020 - bootleg_epr-12543.ic2 - IC2
27c020 - mpr-12378.ic9 - IC9
27c020 - mpr-12380.ic10 - IC10
27c020 - mpr-12382.ic11 - IC11
27c020 - mpr-12379.ic12 - IC12
27c020 - mpr-12381.ic13 - IC13
27c020 - mpr-12383.ic14 - IC14
27c010 - epr-12385.ic19 - IC19
27c010 - epr-12386.ic20 - IC20
27c010 - epr-12387.ic21 - IC21
27c010 - mpr-12384.ic6 - IC6
27c256 - epr-12390.ic8 - IC8
Step 4:
Remove the FD1094 Epoxy Block CPU, replace with the stock 68000 12mhz CPU. Pin 1 faces towards the edge connector. If there is an MCU installed at position C2, remove it, it is not needed.
Tips and other thoughts:
*There are many different rom-boards available for the System 16. Golden Axe runs on more than just the 171-5797. While conversion of other rom boards is possible, they are much more involved and not in scope for this guide.
*You can change region by using different decrypted CPU rom sets. Substitute the CPU roms IC1 and IC2 from the mame rom sets "goldnaxejd" for Japan region, "goldnaxe1" for world.
*System16 is NON JAMMA! Use an adapter before you fry something connecting it to jamma
*If for some reason your CPU board has an epoxy block at position D15, instead of a stock Z80 CPU, replace it with a stock Z80. The audio will not work if there is a custom Sega device installed.
*This guide also applies to E-Swat, in case anybody wants to make that title. Not my personal favorite but still fun!
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