The TF0040IOC Arrives

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terriblefire
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The TF0040IOC Arrives

Post by terriblefire »

As my first dabble into arcade board work I decided to repro a chip that seems to be pretty easy to kill and impossible to replace. The TC0040IOC in my Chase HQ.... Prototype board design is done, manufactured and installed in my 3rd Chase HQ Board.

Its really simple. A XC95144-T100 chip very tightly packaged into that SDIP64 space.

I have finished the Watchdog timer code for the CPLD. I just need to get the 68K bus timings right. A the moment i get "DIPSW A INITIAL ERROR!" which I presume means its reading garbage from the chip. But there we go i will keep everyone updated with progress

TF0040IOC.jpg
TF0040IOC.jpg (325.11 KiB) Viewed 2266 times

Its designed to be assembled as cheap as possible. The CPLD came preassembled for example.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
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Re: The TF0040IOC Arrives

Post by PaulJ_2.0 »

I love this kind of thing, a noble quest.
Following :)
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PhilC
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Re: The TF0040IOC Arrives

Post by PhilC »

Cool project, will be watching with interest
If it ain't broke, test it to Destruction.
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Icky
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Re: The TF0040IOC Arrives

Post by Icky »

terriblefire wrote: Sat Sep 18, 2021 8:03 pm Its really simple. A XC95144-T100 chip very tightly packaged into that SDIP64 space.
That is really tight. Nice work :thumbup:
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arkadiusz.makarenko
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Re: The TF0040IOC Arrives

Post by arkadiusz.makarenko »

May I ask what this chip do exactly?
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stephen_usher
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Re: The TF0040IOC Arrives

Post by stephen_usher »

Trying to work out and reproduce old chips can be fun but also frustrating work.

Once you've finished this I have a nice LSI custom chip I need looking at... the "DECODE1" chip in my Sun 3/80 workstation. It's only a 40 pin PLCC. :lol: ;)

Anyway, good luck with the investigation.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
terriblefire
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Re: The TF0040IOC Arrives

Post by terriblefire »

stephen_usher wrote: Sat Sep 18, 2021 10:03 pm Trying to work out and reproduce old chips can be fun but also frustrating work.

Once you've finished this I have a nice LSI custom chip I need looking at... the "DECODE1" chip in my Sun 3/80 workstation. It's only a 40 pin PLCC. :lol: ;)

Anyway, good luck with the investigation.
Really the only way anything like this gets done is out of necessity.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
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