Sound

Sound emulation volume can be changed by dragging the volume slider (as shown below), sound can be turned off by dragging the slider to the far left.

Equalization can be change via the main below (yellow ellipse). Default 'TV Speaker' is selected.

The different sound emulation and for which computers they are valid is described in the following sub-chapters.

Beeper (hardware oscillator)

This is a very basic sound emulation for just one tone frequency. The Emulated frequency is changeable via the Beeper field (orange ellipse). The tone will be heard when the Q flag is set by 1.

Supported for: Cosmac Elf, Cosmac VIP, Telmac 1800, Netronics Elf II and Quest Super Elf.

Note: for the Cosmac VIP to support this, the sound GUI should be set to 'Beeper' (yellow ellipse):

Note: for all Elf computers to support this, the Q Sound should be set to 'Hardware' (yellow ellipse) and no Video Terminal should be configured:

Beeper (software oscillator)

This is a very basic sound emulation where the changing of the Q flag generates the tone oscillator. The speed of changing the Q flag in software determines the frequency.

Supported for: Oscom Nano, Cosmicos, Cosmac Elf 2000, Cosmac Elf, FRED 1, FRED 1.5, Netronics Elf II and Quest Super Elf.

Note: for all Elf computers to support this, the Q Sound should be set to 'Software' (yellow ellipse) and no Video Terminal should be configured:

Note: for the Oscom Nano to support this, 'Sound' should be set to 'Q' (yellow ellipse):

Note: for the Cosmicos to support this, NO 'CDP 1864' should be selected as video option (yellow ellipse):

Beeper (warpy)

This is a very basic sound emulation for just one tone with a decaying frequency. The tone will be heard when the Q flag is set by 1. This variant does not generate a fixed tone, instead the tone starts at 480 Hz and decays to 240 Hz quickly causing a warpy effect.

Supported for: RCA Studio II, Visicom COM-100.

CDP 1863 or 1864 Sound

Sound emulation for the 1863 (Cosmac VIP) or 1864, one OUT instruction controls the sound features of the CDP 1863/1864 to set the frequency and the Q flag to turn the defined tone on or off.

Supported for: Cosmac VIP, Cosmac VIP II, Cosmicos, ETI 660, Oscom Nano, RCA Studio III / Victory MPT-02, Studio IV and Telmac 2000.

Note: for the Cosmac VIP to support this, the sound GUI should be set to 'VP595 Simple Sound Board' (yellow ellipse):

Note: for the Oscom Nano to support this, 'Sound' should be set to 'CDP 1864' (yellow ellipse):

Note: for the Cosmicos to support this, the 'CDP 1864' should be selected as video option (yellow ellipse):

VP550 Super Sound System

The VP550 uses 2 CDP 1863 chips for sound output. As such 2 simultaneous channels can be used. Frequency can be set by writing to address @8001 for channel A and @8002 for channel B. The Super Sound System has additional HW to set the octave (2 to 5) of channel A or B by writing to address @8003. Bit 0 and 1 define the octave (0: octave 2, 3: octave 5) and bit 2 defines the channel (0: A and 1: B).

Supported for: Cosmac VIP

Note: for the Cosmac VIP to support this, the sound GUI should be set to 'VP550 Super Sound' (yellow ellipse):

VP551 Super Sound 4-channel Expander Package

The VP551 package consists of 2 VP550 boards and one VP576 to connect both sound systems. The VP550 boards work the same as described for the VP550 system above, except that the second board uses different addresses for the 3rd and 4th channel (channel C and D) as described below.

Frequency can be set by writing to address @4001 for channel C and @4002 for channel D. To set the octave (2 to 5) of channel C or D address @4003 is used. Bit 0 and 1 define the octave (0: octave 2, 3: octave 5) and bit 2 defines the channel (0: C and 1: D). Control of the amplitude (volume) is in 16 steps (0 to 15) by either writing address @4010 (channel C) or @4020 (D). Tempo and interrupt control is only performed by one of the VP550 boards. Tempo can be changed by moving the tempo slider (orange ellipse).

Supported for: Cosmac VIP

Note: for the Cosmac VIP to support this, the sound GUI should be set to 'VP551 Super Sound' (yellow ellipse):

CDP 1869 Sound

The CDP1869 address and sound generator (which is part of the RCA Video Interface System is used for audio. 2 channels are available, one for tone generation with a span of 8 octaves, and 1 for white noise with a span of 8 frequencies. Volume of both channels is programmable independently in 16 steps.

Supported for: COMX-35, Cidelsa, TMC-600 and Pecom 64.