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).
While the original tool was a physical ROM cartridge, it is commonly found today as a .dsk file for use with floppy disk emulators like Gotek or modern CPC emulators . Arnold Diagnostic V5 (UK) (19xx) (Cart).dsk
: Tests the enhanced features exclusive to the Plus range, such as the expanded 4096-color palette and hardware sprites. Developed under the codename "Arnold V" (which referred
is a disk image of the official hardware diagnostic tool used by Amstrad technicians to verify the integrity of the Amstrad CPC Plus and GX4000 systems. : Tests the enhanced features exclusive to the
: Includes routines for testing DMA-driven sound and scrolling functions.
: Used to check the operation of the CPC Plus's specific expansion ports and internal circuitry.
: 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