Phantasy star 1 retranslation in after burner pcb not working

Discussion of development of software for any "obsolete" computer or video game system. See the WSdev wiki and ObscureDev wiki for more information on certain platforms.
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crissaegrim87
Posts: 15
Joined: Tue Oct 06, 2020 5:51 pm

Phantasy star 1 retranslation in after burner pcb not working

Post by crissaegrim87 »

Some time ago, I bought 2 afterburner SMS cart to test out the retranslation of phantasy star 1.

Here is what I did:
1- removed ROM, soldered 27040 pin compatible EPROM
2- piggybacked 8 k SRAM
3- lifted pin 20,22,26,27, 28 of SRAM
then followed those paths:

From the japanese phantasy star schematic:

-sram pin CE1 20 to pin 30 RAM CE

-sram pin 22 OE to pin 34 RD

-sram pin 27 WE to pin 31 WR

-sram pin 26 & pin 28 to diode logic backup/5v

From Leonard Silva de Oliveira pinout:

-SRAM pin 20 (/CE1) to PIN 30

-SRAM pin 22 (/OE) to PIN 24

-SRAM pin 27 (/WE) to PIN 29

-SRAM pin 26 left unconnected, pin 28 to diode logic backup/5v

Game works. Saving and pressing reset keeps the save file after reboot. Powering off the console causes the game to stop booting.Removing and reseating the battery solve this, but no save file remains.

I even used a genesis BA6162 for the backup system, but the game keeps reseting after a few seconds
piggy.png
crissaegrim87
Posts: 15
Joined: Tue Oct 06, 2020 5:51 pm

Re: Phantasy star 1 retranslation in after burner pcb not working

Post by crissaegrim87 »

I´m stuck, I can´t make it work correctly
crissaegrim87
Posts: 15
Joined: Tue Oct 06, 2020 5:51 pm

Re: Phantasy star 1 retranslation in after burner pcb not working

Post by crissaegrim87 »

I´m taking this project againg, the only option is to get a reference diagram of monopoly/penguin land/pantasy star and compare it to my pcb. Anyone have a link or someting to look? Thanks
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Fisher
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Joined: Sat Jul 04, 2015 9:58 am
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Re: Phantasy star 1 retranslation in after burner pcb not working

Post by Fisher »

Have you tried this schematic as a reference?
171-5583_schematics.png
AFAIK, it's a Japanese Phantasy Star.
Source: https://www.smspower.org/Development/Ja ... Cartridges
Good Luck!
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