''Not 100% sure if above describes the original PC/CPC interfaces - or if that are homebrew remakes (?)''
---- Disassembling games == Another Version (see list below?), gives confliction port addresses (unclear which are correct, might be also an older or newer PDS hardware version),==
There seems to be also another version, using Port FBEC-FBEF, too. But assigning different meanings to that ports - using different hardware without Z80 PIO chip.
FBEC - unknown (maybe configuration, or maybe REQUEST to PC)
FBED - data to PC (used in Last V8)
FBEE - bit0 = CLK signal from PC
FBEF - data from PC
== CPC Games that contain PDS code == Normally, the PDS related debug/transfer code wasnisn't included in release versions, however, some CPC release versions do still contain some (unused) code fragments that access some Ports at FBEC-FBEF(in non-Z80 PIO fashion):
* Gremlins (spanish version)
* Last V8
* Robin of Sherwood
* Seablood
The code fragments seem to be related to data transfers - whether or not they are Unclear if these games were made using an alternate (older or newer) version of the official PDS hardware, or other if they were using a similar hardware isndevkit from another company. Note: The handshake/timing used in the above games seems to be less stable than in the Z80 PIO version (seem to be working only if the PC software disables interrupts during transfer), so the four games may have been using an 't confirmed'older'' PDS version (or a poor third-party remake).
== Pictures ==
