(MESS) Fix VSM rom read through the tms51xx, and add tms6100 hookup to tispeak.c, fixing speech in speak and spell and speak and math. The drivers are usable but no display yet. Fixed speak and spell clock speed (it is 1/2 the clock input of the tms51xx chip) [Lord Nightmare]

Non-Whatsnew Note: this commit breaks the speech in radar scope trs02 set (because the rom it has has the bits in the backwards order). I will fix this later.