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Text File  |  1998-10-24  |  4KB  |  85 lines
  1. DESKTOP ⑧x1k1
  2.                                 חללללללללללללללללל†
  3.                                 ´  GI AY-3-8910   ´
  4.                                 ´ bit assignments ´
  5.                                 זללללללללללללללללל¶
  6.                                  General Instruments AY-3-8910
  7.                                  Programmable Sound Generator
  8.            םגגגגגגגגגגגגגגגגגגגג™
  9.            ø Selection Register ø b11-b8=[b3-b0]=selected register
  10.            ijגגגגגגגגגגגגגגגגגגגגך
  11.       םגגגגגגגגגגגגגגגגגגגגגגגגג™
  12.       ø PERiod of channel A/B/C ø[b11-b0]=period of channel A/B/C
  13.       ø                         ø         unit=8 µs
  14.       ijגגגגגגגגגגגגגגגגגגגגגגגגגך
  15.               םגגגגגגגגגגגגגגגגג™
  16.               ø PERiod of NOISE ø b12-b8=[b4-b0]=period of noise
  17.               ø                 ø                unit=8 µs
  18.               ijגגגגגגגגגגגגגגגגגך
  19.                     םגגגגגגגגגגג™
  20.                     ø SELECTion ø    b15=port B
  21.                     ø           ø        0:input
  22.                     ø           ø        1:output
  23.                     ø           ø    b14=port A
  24.                     ø           ø        0:input
  25.                     ø           ø        1:output
  26.                     ø           ø    b13=noise on channel C
  27.                     ø           ø        0:yes
  28.                     ø           ø        1:no
  29.                     ø           ø    b12=noise on channel B
  30.                     ø           ø        0:yes
  31.                     ø           ø        1:no
  32.                     ø           ø    b11=noise on channel A
  33.                     ø           ø        0:yes
  34.                     ø           ø        1:no
  35.                     ø           ø    b10=channel C
  36.                     ø           ø        0:selected
  37.                     ø           ø        1:unselected
  38.                     ø           ø     b9=channel B
  39.                     ø           ø        0:selected
  40.                     ø           ø        1:unselected
  41.                     ø           ø     b8=channel A
  42.                     ø           ø        0:selected
  43.                     ø           ø        1:unselected
  44.                     ijגגגגגגגגגגגך
  45.    םגגגגגגגגגגגגגגגגגגגגגגגגגגגג™
  46.    ø AMPlitude of channel A/B/C ø    b12=envelope
  47.    ø                            ø        0:no
  48.    ø                            ø        1:yes
  49.    ø                            ø b11-b8=[b3-b0]=amplitude of channel A/B/C
  50.    ø                            ø                logarithmic law: n+1=SQR(2)*n
  51.    ijגגגגגגגגגגגגגגגגגגגגגגגגגגגגך
  52.            םגגגגגגגגגגגגגגגגגגגג™
  53.            ø PERiod of ENVelope ø[b15-b0]=period of envelope
  54.            ø                    ø         unit=128 µs
  55.            ijגגגגגגגגגגגגגגגגגגגגך
  56.                      םגגגגגגגגגג™
  57.                      ø ENVelope ø b10-b8=[b2-b0]=envelope
  58.                      ø          ø                000:\\\\\\\\
  59.                      ø          ø                001:\_______
  60.                      ø          ø                010:\/\/\/\/
  61.                      ø          ø                011:\-------
  62.                      ø          ø                100:////////
  63.                      ø          ø                101:/-------
  64.                      ø          ø                110:/\/\/\/\
  65.                      ø          ø                111:/_______
  66.                      ijגגגגגגגגגגך
  67.                        םגגגגגגגג™
  68.                        ø PORT A ø    b14=general purpose output            (NOT)
  69.                        ø        ø    b13=parallel port strobe              (NOT)
  70.                        ø        ø    b12=serial port data terminal ready   (NOT)
  71.                        ø        ø    b11=serial port request to send       (NOT)
  72.                        ø        ø    b10=disk B
  73.                        ø        ø        0:selected
  74.                        ø        ø        1:unselected
  75.                        ø        ø     b9=disk A
  76.                        ø        ø        0:selected
  77.                        ø        ø        1:unselected
  78.                        ø        ø     b8=disk side
  79.                        ø        ø        0:side 1
  80.                        ø        ø        1:side 0
  81.                        ijגגגגגגגגך
  82.                        םגגגגגגגג™
  83.                        ø PORT B ø  b7-b0=parallel port data
  84.                        ijגגגגגגגגך
  85.