RE: ST Speech

Tod Miller wrote:
>
> We know the speech is there, it's documented and
> there are wav files for MAME so someone had to
> sample them. Is it possible that a component failure
> either on the speech board or CPU board would prevent
> these phrases from being triggered or is it possible to
> force the speech board to say these (for testing purposes) ?
>

It is possible to test the board outside of the cage. You
would need to hook up a power supply capable of +5V and -5V
to the appropriate points (across C49 and C48 respectively)
and you'd need a scope to 'see' the output. The opamp, U8,
might be able to drive high impedance headphone speakers,
maybe, but I'd use a scope. To exercise a phrase you'd
need to set it's 5 bit code on D0 thru D4, the inputs to
the latch U21 (74LS273) then toggle U21's CLK input, by
quickly grounding then releasing the CLK pin (pin 11).
The codes for the phrases are shown below. Review the
schematics before you try this. Good Luck.

00 = no phrase
01 = "COMMAND THE ENTERPRISE"
02 = "PLAY STAR TREK"
03 = "WELCOME ABOARD, CAPTAIN" (SPOCK)
04 = "CONGRATULATIONS"
05 = "HIGH SCORE"
06 = "PRESS PLAYER ONE"
07 = "OR PLAYER TWO"
08 = "START"
09 = "BE THE CAPTAIN OF THE STARSHIP ENTERPRISE" (SCOTTY)
0A = "DAMAGE REPAIRED, SIR" (SCOTTY)
0B = "SECTOR SECURED" (CHECKOV)
0C = "ENTERING SECTOR" (SPOCK)
0D = "ZERO"
0E = "ONE"
0F = "TWO"
10 = "THREE"
11 = "FOUR"
12 = "FIVE"
13 = "SIX"
14 = "SEVEN"
15 = "EIGHT"
16 = "NINE"
17 = "POINT"
18 = "POINT" (HIGHER PITCH)
19 = "RED ALERT"

Dave
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Received on Wed Mar 1 15:08:48 2000