Date   : Fri, 17 Aug 2007 19:02:36 +0100
From   : robert@... (Rob)
Subject: Homebrew TUBE ULAs

On 17/08/07, Jules Richardson <julesrichardsonuk@...> wrote:
>
> I was wondering whether anyone's ever tried bodging [1] their own TUBE ULA
> which plugs into the relevant 40-pin socket on a copro and appears to the
> system just like one of the original ULA parts?
>
> I presume the complexity's not that high by modern standards - but is enough
> known about the pin functions and internal workings for it to be possible?
>

It's not much more than a set of FIFO buffers isn't it?  But I presume
enough details is known somewhere since Sprow managed to replicate it
in the ARM7 co-pro, although I imagine in that design it's integrated
in with the rest of the support circuitry in the FPGA.   I'd imagine
it's possible (for him, not me!) to create a standalone unit that
would perform just the ULA functions, mounted on a suitable board to
act as a plug in replacement... How practical it is from an
engineering, and cost, point of view I can't say.