+OLD CS1 Posted January 23, 2018 Share Posted January 23, 2018 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. Quote Link to comment Share on other sites More sharing options...
Pheonix Posted August 25, 2019 Share Posted August 25, 2019 I'm currently searching for that information as well. Did you ever find anything? Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted August 26, 2019 Author Share Posted August 26, 2019 No. It wound up being a passing curiosity for me and not practical to my purposes. I lingered on it for a couple of days then it fell off my desk. Quote Link to comment Share on other sites More sharing options...
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