Quoted from Ashram56:Good evening,
In preparation for my upcoming TZ, I'd like to upgrade the ROM to 9.4h. I have the programmer, however I would welcome the reference of the ROM chip to order, along with the ROM binary and it's reference.
With regards to ROM code, I found a ZIP file on VPForums, however it contains multiple files: tzu14_l2.bin, tzu15_l2.bin, tzu18_l2.bin and tz_94h.rom. I'm assuming that U14, U15 and U18 are other ROM chips, but not sure what they are needed for. And my understanding is that U6 should actually be the ROM code.
Could someone please confirm ?
Thanks and regards
If you just want to get someone to do it for you, low cost ($10 or so), here is a great source:
https://mattsbasementarcade.com/product/twilight-zone-pinball-cpu-rom-9-4h-u6-bally-williams-eprom/
Its a deal as you probably can't get a blank chip (with shipping) that cheap!