Labels:text | screenshot | parallel | diagram | line | black and white | receipt OCR: Programmable Sound Generator (YM-2149) - B.25 S M M T L@_ 000000 F T T e e S T T 3 0 Location(s ) Size Type Meaning Programmable Sound Generator (YM- 2149) 0x00FF8800 EB PSG Read (Read only on I/O port B) / PSG Register Select (WO). Reading this location yields data from the parallel interface. Writing to bits 0-3 of this location selects a PSG register to address as followus: Value Register 0000 Channel A Fine Tune 0001 Channel A Coarse Tune 0010 Channel B Fine Tune 0011 Channel B Coarse Tune 0100 Channel C Fine Tune 0101 Channel C Coarse Tune 0110 Noise Generator Control 0111 Mixer Control - I/O Enable 1000 Channel A Amplitude 1001 Channel B Amplitude 1010 Channel C Amplitude 1011 Envelope Period Fine Tune 1100 Envelope Period Coarse Tune 1110 I/O Port A Select (Write only) 1111 I/O Port B Select 0x00FF8802 EB When I/O Port A is selected, this location contains the PSG Write Data (WO) register as follows: TALCON - COE DELYA UNYUCE Falcon - Enthznal Spaster ur - 05232 oath thininal ohady Floppy _orlyal SALact Falcon - pointaz Select Pln ůthazt - 710ppy 02lyml 3bin Floppy _ALda byl SALber When I/O Port B is selected, this locations accesses the Parallel Port Data Register (WO). 0x00FF8804- N/A Unassigned 0x00FF88FF
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