MHT Speech Synthesizer aka Sintetizador de voz ([[MHT Ingenieros]])
''Italic text''== Technical ==
It uses a [[SP0256]](-AL2?) chip.
* The I/O addresse address is &FBE0.(only A10,A7,A6,A5 and A4 are decoded)
* The '''clock frequency is unknown''' (as shown on the photo, it uses an oscillator, ie. NOT the 4MHz signal on the expansion port).
Port '''????'''h FBE0h READ: bit'''?''' 6 Status 1 (0=Speech Busy, 1=Ready/Halted) (SBY Pin, Speech Busy) bit'''?''' Status 2 (0=Ready to Receive Data7, 1=Busy) (/LRQ Pin, Load Request) bit'''?D5-?''' D0 Not used (garbage, probably usually highz)Port '''????'''h FBE0h WRITE: bit7-6 Reserved (should be be zero, though SP0256 Pins10-11 are GNDed)Ignored
bit5-0 Allophone number ;data can be send when Status.Bit'''?'''=0