Developed under the codename "Arnold V" (which referred to the Plus range development), this utility was never intended for public release. It is specifically designed to test the unique capabilities of the Amstrad ASIC (Application-Specific Integrated Circuit).
: Tests the enhanced features exclusive to the Plus range, such as the expanded 4096-color palette and hardware sprites. Arnold Diagnostic V5 (UK) (19xx) (Cart).dsk
: Configured to work with the official Amstrad CM14 (Color) and MM12 (Monochrome) monitors. Technical Context Release Year Developer C.J. Lawson for Amstrad plc Target Hardware Amstrad 464 Plus, 6128 Plus, and GX4000 console Origin UK / Service Center internal use Developed under the codename "Arnold V" (which referred