In December I got interested on the TMS9927 and tried to dive in its internals. I've got the datasheets for both it and its second source 5027. The block diagram on the TMS9927 isn't very useful, it shows nearly no logic between different blocks. However, the 5027 block diagram reveals some interesting interactions between blocks. Unfortunately, all I could get is a lo-res scan of the datasheet where a lot of lines are missing, logic symbols are unrecognizable on some cases and labels are blurry. That's better than nothing, but if someone could provide me this diagram with better quality I'd be very pleased.
(The foresaid block diagram, partially hand-redrawn)
Thank you very much!