Hi there,
I got a Knight of Valour PLUS cart and it seems to have a 3v3 voltage regulator built-in (UPC29L33), the ROMs on the second board seem to be 3v3 and have 5v to 3v3 level translators (QS3257).
Is this the case for all Knight of Valour PLUS PCBs ?
This should make the conversions easier right ? Any experience with those boards ?
Pics :
I dumped the roms and identified them with MAME, this is actually a Knights of Valour Super Heroes (KOVSH) PCB.
I also checked that the ICs are fed with 3.3V (kind of...)
To do a DDP DOJ conversion you need :
ddp_doj_u1.bin - program on U10 (27c322) - (get a dump from another convert, you can find this file with google, this is the only custom file, the rest is from the standard MAME romset)
m04401b032.u17 - program on U1 (27c322) - from the MAME ddpdoj romset - Don't put this on an IC socket since the clearance space inside the case is not enough. (you can manage to close it but the PCB will bend)
t04401w064.u19 - split in two files, the first half program on U3 (27c322) the second half on U7 (27c322) - from the romset
b04401w064.u1 - program on U15 (26L6420) - from the romset
a04401w064.u7 - program on U22 (26L6420) - from the romset
a04402w064.u8 - program on u23 (26L6420) - from the romset
You can leave the other ICs on the PCB
You can check your conversion in MAME by using the kovsh driver and replacing the following files in the kovsh romset :
p0600.322 - ddp_doj_u1.bin
m0600.rom - m04401b032.u17
t0600.rom - t04401w064.u19
b0600.rom - b04401w064.u1
a0600.rom - a04401w064.u7
a0601.rom - a04402w064.u8
I strongly recommend testing in MAME before doing your conversion.
I did a partial conversion (since I am waiting for my 26L6420 chips to be shipped) and I burned every file except the a and b files, I got the same results in MAME (without replacing the a and b files, 3 files) than on the actual hardware.
The program (game) works, warning message is good, backgrounds and music too, I just need the sprites and colors. I'll let you know when the chips arrived and I have a full conversion.
This seems like the best PCB for a ddpdoj conversion, it is easy (if you can de/solder SMD parts) and looks really clean since you don't need the extra 3.3V line and the "jizz" (why not use a dot of superglue and AWG32 wires... I wonder...)