It’s important to have a bunch of unfinished projects on the go 😉 so here is one more on my list. If you recall, I sell a PCB for the Kawaii R100 that has three EPROMs on it. This gives the R100 user access to all 3 Kawai factory sound ROMs. And the ROMs in question are pretty large (40 pins). Each sound ROM contains a full set of 24 instruments. I call this the standard 3x board and you can see it on a previous post here: http://musictechnologiesgroup.com/blog/wp-content/uploads/2013/08/P1030676.jpg
And now, the new 4x:
I recently started playing with even bigger EPROMs (42 pins). This means I can put all 3 factory sound ROMs in one chip and still have a bank left over for more custom sounds. This board I’m calling the “QuadROM” 4x board. See above. It can hold 4 sets of 24 instruments in the one chip. Less soldering for me.
Of course in both cases the user can make their own EPROMs using my R100 Builder software, but for the 4x it means you need a pretty decent programmer since the cheapie programmers may not do the 42 pin EPROM; at least not without an adapter.
Also, because there are now 4 banks, it means a simple 3-position toggle switch won’t do. I have to invest in a quality 4-position rotary switch that is still small enough to fit in the R100. Anyway fun stuff on a Saturday. I will work on it more as time allows and see what comes of it.