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Old 11 April 2003, 15:41   #1
Tony Landais
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Plus/4 and C16 troubles

I know it's an amiga board but I have to others commodore machines in trouble...
I hope codyjarret will not kill me for that

I have 2 plus/4 "black screen" and a C16 "yellow screen".
I checked the mother board redo all weld... but nothing change.

Is anybody already meet the problem and resolved it ?
or just a clue
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Old 11 April 2003, 21:04   #2
Akira
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No problem posting about other old compies, just post the stuff in the Retrogaming forum

As for your problem, it c ould be many things. Probably a dead TED in the black screen ones!}

have you tried asking in the http://plus4.emucamp.com forums?
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Old 12 April 2003, 00:12   #3
Overdoc
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I am not sure, but I think C16 and Plus 4 apart from differences in Ram have the same chips in them Also I blieve bigger chips are socketed in these. Then you could try swapping chips from one to another. Best would be if you have another working unit, because then you can check each chip of the dead computers one by one in the working one and find out which chip is broken.
Unfortunately these machines often have a dead TED chip, which is almost impossible to find spare ones for....
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Old 12 April 2003, 00:22   #4
Tony Landais
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What is the TED?
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Old 12 April 2003, 12:50   #5
Mr Creosote
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Quote:
I am not sure, but I think C16 and Plus 4 apart from differences in Ram have the same chips in them
Not all of them. The Plus/4 has all these 'business applications' built in its ROM and I think it also has a newer Basic version. Don't know about the rest.
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Old 12 April 2003, 18:57   #6
Phiber
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Quote:
Originally posted by Tony Landais
What is the TED?
TED is the equivalent of C64's SID and VIC-II chips combined..

Graphics:
MOS 8360R2 TED ('Text Editing Device')
Max.Res.: 320x200
Max. Colors: 128 (121 with 7 shades of black)
Text: 40x25 characters with graphical charset
the MOS 8360 is both PAL-B and NTSC-M version, but there were a PAL-N (8365) and a PAL-M (8366) version

Sound:
2 sound-generators integrated in TED
sound generator #1 can produce sound only, while #2 can also create distortion effects
sound output is done via SOUND-command, volume controlled via VOL
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Old 13 April 2003, 00:05   #7
Overdoc
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Quote:
Originally posted by Mr Creosote
Not all of them. The Plus/4 has all these 'business applications' built in its ROM and I think it also has a newer Basic version. Don't know about the rest.
Ahh, yes, sure, you are right - forgot about this.
But anyway, if these were bad then that wouldn't be a big problem since they could at least be replaced by Eproms easily
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