JAMMArcade.net – Page 225

SEGA Megadrive EPROM PCB

Sep 112012

Got my hands on this thing today

There are no EPROM’s in it yet but will knock some together when I get time and test it out.
It has a battery backed RAM and a bank of DIP’s that I have no clue yet as to what they do.

There is a CK2605 PLD at IC10 marked up as 315-5341.
I cannot find any programmer that will actually support these chips but it is known that they can be dumped as a PLS153 and Charles MacDonald has a utility that can trim the overdumped .JED and convert it to a functional PLS153 fusemap. I have uploaded this converted fuse map.

I have also decompiled the .JED into equations and converted it for a GAL22V10 which I will be able to use my converter board for. It is untested, obviously, as I haven’t had the thing up and running yet but will hopefully sort this soon.

SD2IEC finally assembled

Mods 2 Responses »

Sep 092012

Quite a long time ago I had some more SD2IEC boards made up for the C64.

I hadnt really done anything with them and I had promised id make one up for Stiggy.
Today I finally got around to making one up and im pleased to say it seems to work.
The wires need tidied up a bit but it loaded up a game no problem.

And that was the last of my outstanding projects.

Hard Head bootleg PALs

PAL Updates Comments Off

Sep 072012

Another from the set of Luiskiko
Hard Head bootleg.
All of these are from the daughter board

Street Fighter Zero 2 repair log #2

PCB Repair Logs, Repair Logs 4 Responses »

Aug 192012

I wasn’t originally going to write this up but seeing as though I won’t have much time free in a few weeks I thought I might as well.
So, this game would hang at the Q Sound check at startup. After a quick check I found why.

I straightened the pin and the game now works.

Is there no end to CPS2 PAL’s?

PAL Updates Comments Off

Aug 092012

Whilst sorting out some CPS2 stuff the other day I found a BGSB3E PAL in a Street Fighter Alpha. I didn’t have this in my list so dumped it. It was actually unprotected so its a proper dump and has been converted for use on a GAL16V8 device and tested.

Also, whilst looking into a potential bad dump (turned out to be fine!), I found 2 other PAL’s in a Super Street Fighter 2 Turbo board They are found on the daughter board and are labelled:
BGSG1 and BGSG2.

BGSG1 is linked to the sound, without it it plays some SFX choppy and the music is a mess
BGSG2 is graphics related and gives jailbars and messed up sprite priority when removed.

Both are dumped and have been tested.

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