Cp Function
INACTIVE. See 01D TAB belo LATCH ADDRESS See 111 UNTAKl bduw INACTIVE The PSG CPU bus Is inactiva DA7--DAD are n a high imprrJance aiaia. FIE AH FTt d PSG. Th s amp ir ii bl tauses Ihe contend Ihe register which s CLirrfrfitly addressed ta appear on irw PSG CPU bui. OA7 DAO 3re in the Ouipul made LATCH ADDRESS. See 111 INTAK'i belosv INACTIVE. See 01 3 IAS above WRITE 10 PSG Th s signal indicates that the hu contains register d.H i wlrch should be Ifiichi.KJ iriio the currenliy fiddr ssed eg gt...
A a r f
A t Since the AY-3-B910 6912 PSG must be used with support compo-. nents, in te rfac i ng lo I he circ uit i s an obv ious req u i reme nt Th e PSG i s IntrOdllGtlOn designed to be controlled by a microprocessor or microcomputer, and drive directly into analog audio circuitry It provides 1he link between the computer and a speaker to provide sounds or sound effects derived from digital inputs. The following paragraphs provide examples and illustrations showing the ease with which an AY-3-B910...
Organ Envelope Generation
The envelope generation diagram shown in Fig. 25illusirateshowi an AY-3-3910 can be configured to produce envelopes for organ voicing. All functions are controlled by a microcomputer. The basis of this system consists of a master frequency generator with a string of dividers. This produces all frequencies for the keyboard The mtcrocomputer and the AY-3-3910 are actually used lo replace Ihe usual components 01 voicing filters that would ordinarily be used in an electronic organ. The m i croco...