What problem does it solve? Building C or assembly programs for the modular RC2014 hardware family with z88dk requires choosing the correct C library (classic vs newlib), CPU subtype (Z80 vs 8085), serial CRT variant, and ROM packaging format. This Skill encodes those target-specific defaults and recipes so compilations for +rc2014 succeed without trial and error. ## Core Features & Use Cases - CLIB and subtype mapping: Documents the default sdcc_iy newlib configuration, classic -clib=default builds, and 8085 subtypes (acia85, uart85, basic85) that force -m8085 -clib=rc2014-8085. - Ready-made build recipes: Provides copy-paste zcc +rc2014 command lines for newlib, classic, 8085, and CP/M-style startups with -create-app ROM/ihex packaging. - Boundary guidance: Clarifies that +rc2014 is distinct from +cpm and +hbios targets, preventing misconfigured builds. - Use Case: A developer writing a serial-monitor program for an RC2014 with an 8085 CPU card uses the acia85 subtype recipe to produce a correct ihex ROM image on the first attempt. ## Quick Start Ask the assistant to compile a C file for the RC2014 target with z88dk, for example by requesting a newlib build with the default basic subtype or an 8085 build using the acia85 subtype with ROM output.