Just a quick note.
The PLD Archive has now been split into two, A-M & N-Z.
This needed to be done as the table was becoming slow and unresponsive for us when we are updating it and we were fearful of a database crash.
Nothing else has changed and all the entries should still be present but you will need to select the table you want to see from the page.
Thanks
Today I dumped and tested all the PAL chips from a Space Gun PCB.
These are all in MAME already but I dumped them from strykr’s PCB.
I have dumped the two PAL16L8’s from The Simpsons PCB.
The PCB is a non worker right now so I cannot test them so if anyone out there in internet land can test these I would be grateful.
Got a mammoth box of boards from Ben76 the other day. This Star Jacker PCB is one of them.
Game gave a black screen when powered up and there was no sync signal.
Ben also gave me a scan of the schematics for this board so was quickly able to determine where the sync came from.
My heart sank a little bit as the sync comes from a PAL16R4 chip
On investigating I found the VCC pin was not making a good contact in the socket so I removed both of the PAL sockets and replaced them.
So booting now gave me sync but solid white screen. Ive seen this before on quite a few boards and its almost been RAM issues. I started probing the RAM chips and found a 2016 SRAM at location IC151 had completely dead outputs despite being enabled and having active inputs. I desoldered it and replaced it with a 6116 SRAM chip.
Now I get this (NOTE: the red colour is actually present but I have to edit my pictures these days as the HTC One makes low light pictures all purple)
All fully working again.
Bad_ad84 has sent in some dumps from an Under Fire PCB.
They are untested right now and are still in PAL format.
At present ive left them all in a single ZIP file until we can check them out to see if at least the equations look plausable as its always possible some of the devices were locked.
Thanks to Bad_ad84 for his contributions, much appreciated.