IDE Card with SD Storage (SD35VC0)

This pairing turns the MicroFox IDE Host Adapter into a modern solid-state storage solution for the Coleco ADAM. The green IDE Host Adapter (© 2012 MicroFox Technologies, distributed exclusively by ANN) seats in expansion slot #1 and connects through a 40-pin IDE ribbon cable to a black SD35VC0 SD-to-IDE adapter, which presents an SD card to the ADAM as a standard IDE hard drive.

The SD35VC0 is a later-generation adapter in a 3.5" hard-drive form factor: a consolidated FPGA/MCU performs the full IDE-to-SD protocol translation in firmware, with dual power inputs (4-pin Molex and floppy-style FDD), labeled status LEDs (Card Detect, Active, Power), and standard drive mounting holes for clean installation. It supersedes the earlier bare CompactFlash/SD carrier boards that relied on minimal passive logic.

The IDE boot-cart ROM scans device IDs $04–$08, mapping the first five to hard-disk partitions and activating Coleco's dormant 4-drive expansion IDs ($06/$07) via boot-time EOS hot-patches. A typical power-user layout splits the partitioned SD card between EOS partitions (for ADAM SmartBASIC and native software) and TDOS partitions (for the CP/M environment) — for example, 10 EOS + 4 TDOS.