OK. Here's a bit more zero page info I've re-verified as viewed in Hexworkshop.
09h????????? ? ? ? ? number of modes for voice
10h????????????? ? ? number of modes total - difference is number of option modes. Set these to the same value. Increasing options modes in RSS will reduce available voice? modes
01Bh??????????? ? ? number of MPLs. Standard RSS max values is10h(16d)
019h & 01Ah??? data pointer to beginning of MPL data area. OEM value is set to 0700h. First byte of MPL1 value is in 0701h
