More PAL dumps from Luiskiko this time from SNK’s Prisoners of War
Prisoners of War PAL dumps
PAL Updates
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Jun 032012
Rastan PAL dumps
PAL Updates
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Jun 032012
Added more PAL dumps from Luiskiko.
These are the missing PAL’s from Rastan. Providing they work I should now have the full set.
1943 repair log
PCB Repair Logs, Repair Logs
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May 312012
Got a few boards today.
One of them is an original Capcom 1943 board.
Game had no sound at all.
After a quick look over the problem became apparent.
The EPROM for the sound was missing its GND leg. I replaced this with a 27c512 (data doubled up) for now as I seem to be out of 27c256 EPROM’s.
Game is fully working now.
May 262012
Ive been wanting to get a RAM upgrade for my VIC20 ever since I found Robotic Liberation demo wouldn’t load from SD2IEC unless it was expanded. As eBay prices have gone stupid I opted for the homebrew piggyback method.
This method involves soldering a couple of 6264 RAM chips onto the Kernel and the BASIC ROM’s and lifting a few legs to run some wires elsewhere.
The guide I followed can be found here so I wont bother rewriting it.
Its pretty easy to follow but found it best to read through it a few times before starting.
I had already replaced the Kernel ROM in my VIC for a JiffyDOS one using one of my adapters so some of the work was already done for me regarding the pinout differences but as the guide says, best to check the operation after each RAM is fitted to confirm its working.
Anyway, here are a few pictures
You can see my custom board in the lower right hand corner of the PCB
And following the upgrade
Completed mod
And finally, Robotic Liberation
Its pretty easy to do and fairly quick once you understand the instructions.
Spectrum 128 +2a repair log
Computer Repair Logs, Repair Logs
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May 222012
As Ive been doing some repairs on divIDE’s and I didn’t already own one, I picked up a nice cheap 128 on eBay the other day, sold as powering up but wont load games.
At first I suspected it was just a dodgy tape drive and as I would be using the divIDE to load stuff it didn’t bother me.
So, it arrived and I powered it up and it worked OK. I loaded up my test game and it loaded fine but then crashed. I tried it again a few more times but kept crashing at random points. Time for another going over with the 9010 I thought, only when I fitted it, it no longer crashed. I replaced the Z80 for a brand new one and its been fine.
Nice and easy