https://www.neo-geo.com/forums/index.php?threads/status-samsho-v-special-redump.253075/
thanks to neodev, niko and razoola this is awesome.
just to note which are the correct values:
in order to make the value at 0x60bc0 be 0x08, the encrypted value present at 0x00000 should be 0x43 (it is 0xE0)
in order to make the value at 0x160bc0 be 0x82, the encrypted value present at 0x00001 should be 0xC9 (it is 0x25)
0x06bc0 was 0xab, should be 0x08
0x0ed41 was 0x08, should be 0x89
0x16bc0 was 0x6e, should be 0x82
0x1ed41 was 0xda, should be 0x8f
thanks @Nic034 .
You mention 16BC0 only, but on that other forum they posted that 4 changes were necessary. Let me quote them:
0x06bc0 was 0xab, should be 0x08
0x0ed41 was 0x08, should be 0x89
0x16bc0 was 0x6e, should be 0x82
0x1ed41 was 0xda, should be 0x8f
How many should I change? All 4, right?
Appreciate the work Niko Are there any other audio fixes that have been found? Heard about one for Pulstar and Metal Slug X out there, but couldn't find it.
Seriously? Does she have a sister that can solder and hack code as well? Not for me, it's for a friendmy wife, who usually helps me with the detailed solder work,
Already did. I know it can be cleaned better, but at this point it has been desoldered four times, so it's burnt up, and I'm just trying to show there are some bridged solder pads. No point cleaning it more now, because it's toast. Unless those two pads are supposed to be bridged?Pour some liquid flux on that, then some flux on the soldering wick and clean it up.
What makes you think they shouldn't be connected? Based on the image that looks like 2 big ground planes connected together.Already did. I know it can be cleaned better, but at this point it has been desoldered four times, so it's burnt up, and I'm just trying to show there are some bridged solder pads. No point cleaning it more now, because it's toast. Unless those two pads are supposed to be bridged?
That's the answer I was hoping for, thanks. I was hoping that's the case, but not familiar enough with this type of PCB and its connections to make that determination myself. Will check further.What makes you think they shouldn't be connected? Based on the image that looks like 2 big ground planes connected together.
Whatever chip was here before, find its datasheet and look at the pinout. There might not be anything wrong with the way it is.
Should be pins 33 and 34. Per the datasheet of the chip I'm using, that's Vss and OE#. So if I'm understanding correctly, if it's not broken, then that OE# pin should be tied to Vss to pull it high to enable reading from the chip?What makes you think they shouldn't be connected? Based on the image that looks like 2 big ground planes connected together.
Whatever chip was here before, find its datasheet and look at the pinout. There might not be anything wrong with the way it is.