Also, the TMS5220 requires -5V to work properly and the clock spans from
-5V to +5V I believe... so check that out.
peter jones wrote:
> -----Original Message-----
> From: Joseph Magiera <joemagiera@ameritech.net>
> To: rasterlist@vectorlist.org
> Date: Thu, 12 Feb 2009 08:19:16 -0800 (PST)
> Subject: RASTER: tech: Atari System 1 Indy Jones speech missing, music bad?
>
>
>> Testing an Atari System 1 Indiana Jones And The Temple Of Doom. Appears to play ok, but in self test, the sound CPU is reported good, but on the Speech Chip Test I get no speech. I tried it in MAME and there are speech clips played. Any idea which chip on which board at what location is bad? The other sounds appear to be fine.
>>
>> The one other thing I notice is that in MAME, the music self test appears to go much quicker and play more notes than my real game, so I might have a bad music chip too. Can anyone
>>
>>
>
> forget mame, it's not always acurate.
> the speech is generated by a 28pin texas instruments TMS5220
>
> 2 things here.
> 1: indianna was the only sys1 game with speech, so if the boards were originally something else it may be missing.
> 2: those chips have a nasty habbit of tarnishing and losing legs.
> if you find it the legs will probably look black.
> when you take it out of the socket, dont be surprised if you leave some of the legs behind.
>
> in these situations i like to replace the socket with a turned-pin type,
> then clean the legs on the chip and fit it in a second turned pin socket with small wires soldered between the socket & stubs where the legs fell off.
>
> then plug the 2 sockets together.
>
> others probably have there own methods - this problem is common in starwars boardsets.
>
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Received on Thu Feb 12 15:35:30 2009
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