Identifying a Mystery ISA Card

[Fred Cisin]

On Thu, 15 Oct 2020, Sean Ellis via cctalk wrote:
> I got this (currently exploded) mystery RAM, RTC, and I/O board out of
> a dead Sanyo luggable the other night, and once I replace the burned
> up tantalums I'd like to put it in my 5150 so I can get a full 640k of
> RAM.
> Question is, does anyone know what this board is? It's a completely
> anonymous board with not even an FCC ID to go off of. I'm assuming the
> RAM is at least strapped right; all the banks are full which should be
> 384k, and the Sanyo was a 256k machine = 640k.
> Here's a couple pictures; one's an actual picture of the card and the
> other is a simplified TULARC/TH99-esque vector of what's on the board.
> https://i.imgur.com/WhO4cco.jpg
> https://i.imgur.com/uBCkv5G.png

It resembles, although doesn't match, the AST Six-Pack.
But the AST Six-pack had a clock circuit.