MAMEWorld Forums - EmuChat

> States this:
>
> Main processor(s)- seems the main processOr is made by Texas Instruments but does
> have Williams Electronics on it. 5410-12862-00
>
> Only other notable processor is Texas Instruments TMS34010FNL-50 Use is still unknown
> due to lack of Schematics.
>
>
> The 5410-12862-00 chip was used in other Williams boards and is listed in the T Unit
> CPU Addendum as being a DMA2 (Direct Memory Access) controller.
>
> If you look at the T unit schematics on page 3-14, CPU Sheet 8/22, or page 50/74 as
> listed in Adobe Acrobat, you'll see the pinout for the chip.
>
> I have had a board on my bench with graphic corruption which was caused by popped
> solder connections on the pins of this DMA2 controller. It did not cause any crashes.
>
> Also, check page 43/74, CPU Sheet 1/22, to see how they used the 34010 chip on the T
> unit. Data sheets on the TMS34010 can be found out at http://www.datasheetarchive.com
>
> RJ

Thanks.

Actually, I think this is one of those cases where the knowledge of the system and how it worked outpaced comments in the source: in other words, that is actually known, just not commented upon.

Still, I'll prod someone to update the sourcecode comments

- Stiletto