</gallery>
=== X-Modul (RS-232 232C Interface) ===
The "X-Modul" adds a RS-232 232C interface to -X drives. They are suspected to be at least partially compatible with Amstrad/Pace interfaces.
==== I/O Ports ====
{| class="wikitable"
|-
! Port Address !! UsageRead !! Write
|-
| FADC, FADD || Serial Channel A data || Channel A data and control
|-
| FBDC, FBDD, FBDF FADD || Counter 0/1/ModeChannel A control || Channel A control
|-
| FADE, || Channel B data || Channel B data|-| FADF, FBDE || Channel B ports (unused)control || Channel B control|-| FBDC || Load counter 0 || Read counter 0|-| FBDD || Load counter 1 || Read counter 1|-| FBDE || Load counter 2 || Read counter 2|-| FBDF || Write mode word || -
|}