IntyBASIC Intellivoice Detect?

[First Spear]

What is the right way (or smart way) to detect if an Intellivoice is connected? That way a sound effect could be played if there is no IV plugged-in. Does VOICE INIT return a value or set any memory location that can be polled through code?

 

Thanks.

 

[intvnut]

I don't know if IntyBASIC provides a native way. But, PEEK($80) will return -1 if there's no Intellivoice.

IF PEEK($80) = -1 THEN
    PRINT AT 0 COLOR 7, "No voice"
ELSE
    PRINT AT 0 COLOR 7, "Voice"
END IF

Edited October 29, 2017 by intvnut

[intvnut]

On a related note: I'm working on another update to jzIntv, so that it will pick up "voice = 1" in your CFG file and automagically enable voice. You can make use of this from IntyBASIC by adding:

.

ASM CFGVAR "voice" = 1

.

You may still want to force voice back off for testing, though. You can specify "-v0" on the jzIntv command line to force voice off. The command line always takes precedence over the CFG file.

 

Other useful CFGVARs include:

.

' Ask for ECS to be enabled (for more PSG sounds!)
' You can override with -s0.
ASM CFGVAR "ecs" = 1

' Specify how title should appear in LTO Flash
ASM CFGVAR "name" = "Long name of game"
ASM CFGVAR "short_name" = "Short name"

.

The 'ecs' and 'voice' variable support should be in the next stable dev release, which I should post tonight or tomorrow.

[intvnut]

I've posted the new jzIntv release, finally.

[intvnut]

As I mentioned in this other thread, you can wrap the Intellivoice detect in a nice DEF FN:

 

.

DEF FN voiceon = PEEK($80) + 1

.

This returns non-zero if there's an Intellivoice present, or zero if it's absent. It's slightly smaller/faster than PEEK($80) <> -1.