How do you want me to fill in the SVG titles? The SM530 has 48 segment signals named Oij, where i is 1 to 4 and j is 0 to B.
The decoding circuits around the 2 ROM arrays are vertically flipped. I assumed that the bottom one was in the correct orientation, and verified that when I noticed the 16 bits at the far right of the last row of the bottom array and the first row of the top array. Those are the 0x80s that are in the unused 64th byte of each page. That also shows that the columns on the far right are bit 7, which is opposite the layout of the SM51x chips. And that also shows that the pages and bytes in the pages are arranged differently (more simply) than the SM51x chips (http://www.seanriddle.com/cms54c_topgun_rom_5k.JPG).
I had the Top Gun patent's ROM dump to show me how to rearrange the bits on the die for the SM510, but I can't find any patents with code for the SM530, and I haven't found any SM530s in packages that I could attempt to electronically dump. So we may have to use trial and error to figure out the page ordering.
In addition to the SM530, there was another die under a glob that I think is for more tones/sound effects. That die is labeled HMC HA1152. Maybe Holtek? But I can't find that part #. 18 pins, with a 32x32 bit ROM.
Those dies have the pin #s by each pad, which I've seen a few times, but they also have the signal names! Unfortunately the MCU from the instrument cluster doesn't.
And in other 6502 news, I got the 6502-ish source code for the original 1998 Furby (it's got a Sunplus SPC81A). But the USPTO must own stock in paper companies, since they would only mail me a printout- about 200 pages just for the source code! I ordered and paid for the patent online, then they emailed me and said I had to pay more because it was so large. But I couldn't pay the extra amount on their website, and they couldn't take payment info over email or by phone. The only way I could pay was to fax them credit card info....
