A short but interesting interview of Stefan Walker who did the conversion of the game Pirates ! (Micropose) on Amstrad CPC in 1987. He even worked in the united states for 6 months with Sid Meier himself !
Not stated in the interview but in the CPCWiki's thread, the program was written in BASIC with RSX, which did ease the port to the X-Mass.
There is a longplay (very long at 6 hours) made by Amstrad Maniaque of Pirates !.