Oberheim Prommer Service Manual.pdf - Fdiskc

f = 16,000,000 / (65536 – N)Where N is the decimal equivalent of the value loaded into the Sample RateCounter Data latches.1001 0xxx xx00 0x10 EPROM Address LSB1001 0xxx xx00 0x11 EPROM Address MSBThe EPROM address is applied to the EPROM under test.1001 0xxx xx00 1xxx Rockwell 10937 display controlleraccess register (write-only)Control characters are: A0H through AFH – data buffer pointer control, C0Hthrough CFH – Number of digits to be displayed (C0H for 16 digits), E0H throughFFH – Duty cycle control (brightness). Upper case ASCII characters (000Hthrough 7FH) written to this register will be displayed.1001 0xxx xx01 0xxx Audio output FIFO registerData written to this register will be shifted out to the output DAC at the samplerate if ADC/DAC is low.1001 0xxx xx01 1xxx EPROM Data latchLatch for EPROM data. Output is in tri-state mode when OE* is low.1001 0xxx xx10 0xxx D7 Input filter selectWrite 0 to select 16KHz filter, 80H to select 8kHz filter.Analog Control Sample/Holds(Write Only)1001 0xxx xx10 1x00 Output VCF frequency S/H1001 0xxx xx10 1x01 (N) VPP reference voltage S/H:Vpp = N * 0.1061001 0xxx xx10 1x10 (N) VCC reference voltage S/H:Vcc = N * 0.0321001 0xxx xx10 1x11 ADC/DAC reference (VCA) S/HPrommer Service Manual 17