Porchy

Mortal Kombat PAL dumps

PAL Updates Comments Off

Dec 242011

Today I found a PLS153 and a couple of PAL16L8 IC’s on my old Mortal Kombat board.
I have added the original PLS153 dump and also reworked it to work with my GAL adapter, both are in the Downloads section.

The 2 PALs were protected so these were dumped with the Boardmaster.

If any of these IC’s are missing from the board, it will not boot at all.

The manual for MK states the following for the chips:
5346-40025-2 => PLD Address Decode
5346-40025-3 => PLD Video RAM Control
5346-40025-4 => PLD Local Control

These have all been tested

PLS153 to GAL22V10 adapter

General Comments Off

Dec 232011

A little while back I made up an adapter for the PLS153 so I could use a GAL22V10 in its place providing the JED file was reworked.
I made the adapter on veroboard but now I can do basic prototyping using copper clad boards I thought id make a proper one up.

The design only took 5 or so minutes in Eagle CAD and after a quick sanity check I printed and transferred it to a board.

And a little while later it was etched and time to drill this thing out.

I fitted sockets where needed and took a few comparison photos with the old proto one.

(or is it GAL2PLS?)

Time to run the game, works perfect. Im happy with this, I can now replace these parts reliably should I need to.

ZX81 ZXpand unit with ZXpand AY sound add-on

General 2 Responses »

Dec 152011

Today I received a ZXpand with AY sound add-on.
This is a really useful SDcard device for the ZX81 made by my pal Charlie Robson.

Havent had a chance to mess around with mine today but ive used one at RCM and have been most impressed.

Ill post more on it when I get time over Christmas

The ZX Spectrum ULA book

General Comments Off

Dec 122011

Taking my new found interest in all things Sinclair a little further I have got hold of a copy of this book.

From what little Ive read so far its seems very interesting and about my level too.

Spartan 3e program

General Comments Off

Dec 112011

So I made my first FPGA program for the LCD on the dev board. I found this amazingly hard work as the whole VHDL programming seems unnecessarily difficult and good tutorials are limited and undescriptive.
Still, here it is:

Older Entries Newer Entries