Mr.Do's Castle High Score Saver
Finally a score saver for Mr.Do's Castle (!)
To make life more interesting, as things can't be easy there are three different versions of the ROMset for Mr.Do's
Castle. The patches for all 3 of them are provided.
This is a pretty easy update, depending on your version just burn replacement ROMs for A1, location P1, and A4, location K1. Then add an NVRAM to the board at location E1.
The downside is from looking at several Mr.Do's Castle they all have a soldered in SRAM. So some soldering to remove the RAM and add a socket is required.
Thanks go to John G (barakawins) for the prodding to get it done and testing.
Click for the source and notes on patches here, z80 source and notes for the updates.
Clearing the Scores
To clear the scores push and hold the joystick up during the power on test, at the end of the
test you'll be presented with a simple menu, follow the instructions on screen on how to clear or cancel.
You will need, 1 x 24pin socket, 2 x 2764 EPROMs, 1 x DS1220 or M48Z02 2k x 8 battery backed SRAM.
See the board overview below for chip locations.
Modified Program ROMs
E1 must be replaced with a battery backed SRAM, outlined in red.
Note: These are the program images only