X-ROM
From CPCWiki - THE Amstrad CPC encyclopedia!
A ROM board and EPROM burner by (Timatic Systems).
I (Arnoldemu) contacted Timatic many years ago, unfortunately they lost all their CPC information when the had a fire at their offices.
User manual: File:Xrom.pdf
Source code to EPROM (has burning code on it): File:Xrom src.zip