Mdkarm Version 474 [2021] -

: Bundled with CMSIS 4.0 , including updated versions of CMSIS-CORE (3.30), CMSIS-DSP (1.4.2), and the RTOS-API (1.02).

: Added native support for Atmel SAMG and SAM4 series microcontrollers. mdkarm version 474

If you saw it in a log file, a boot screen, or a document, that context would help narrow it down significantly. : Bundled with CMSIS 4

The question was poetic. No code ever asked a question like that. : Bundled with CMSIS 4.0

or to review code written years ago that may not be fully compatible with the latest MDK-ARM versions. Download Availability : Finding a trustworthy download source