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[OLD CS1]

Zimmers has the 1581 Update-5 and -6 ROMs by TFSS with a little information but not complete.  Specifically, Update-5 says:

 

Using 8K SRAM Expansion $2000-$3FFE, And MOSTECH 6529B PIO $3FFF for parallel data transfer routine from BARD'S TALE III.

 

The is pretty self-descriptive but is there an accompanying documentation showing how to perform the installations of the additional hardware?  What about this parallel transfer routine in Bard's Tale III?

 

On a side note, Zimmers has what looks like the source code for the original 1581 ROM.  I have mused upon the notion of an HD version or a dual-drive version of the 1581.  Just because.  Could be fun but not sure I want another "fun" project on my desk right now.