Coleco ADAM Schematics (in PDF format)
Restored by Richard F. Drushel

About the Schematics

• The unrestored versions of most of these schematics and component ID drawings are in quite bad shape. I will work as I can on restoring the best available copy of each drawing. Some parts are so illegible that they may not be restorable without recourse to the actual circuit boards, disassembly of ADAMnet 6801 microcontroller firmware, research of IC pinouts from data books, etc.

• Even for "unrestored" images, I have usually removed photocopy noise spots and corrected the rotation.

• Feel free to pick one of the unrestored ones to work on yourself! Adobe Photoshop 7.0 and a fast machine with hundreds of MB of RAM and tens of GB of HD space recommended!

• Some schematics are available in alternate versions. In such cases, the most-legible ones are given first.

• If you have any additional schematics, or better starting copies than the ones I'm using as the basis for restoration, please contact me!

Click on the thumbnails to download the hi-res (1200 dpi) PDFs.

Last updated Tuesday, 12 November 2002, 7:57 A.M., by RFD

ADAM "Gamma" Logic Board, Sheet 1
(64K RAM, EOS and SmartWriter ROMs, ADAMnet Master 6801, Memory I/O Controller, Expansion Slots)

Schematic, Revision E4 (unrestored). Source: 6-part scan of full-sized blueprint photocopy (Richard Clee). Size: 620K.	Schematic, Revision E3 (unrestored). Source: scan from The ADAM Technical Manual (Rich Drushel). Size: 408K.
Component Location/Identification Drawing, Revision E4 (unrestored). Source: scan from The ADAM Technical Manual (Rich Drushel). Size: 288K.

ADAM "Gamma" Logic Board, Sheet 2
(Digital Data Drive, ADAMnet Interface)

Schematic, Revision E4? (unrestored). Source: 6-part scan of full-sized blueprint photocopy (Richard Clee). Size: 224K.	Schematic, Revision E3? (unrestored). Source: scan from The ADAM Technical Manual (Rich Drushel). Size: 204K.

ADAM "Delta" Game Board
(Z80 CPU, TMS-9928A VDP, 16K VRAM, TV/Monitor Output, ColecoVision ROM, Game Controller Ports)

Schematic, Revision D4 (some broken lines and text repaired, but mostly unrestored). Source: 6-part scan of full-sized blueprint photocopy (Richard Clee), plus missing rightmost edge scanned from The Hacker's Guide To ADAM Volume II (Rich Drushel). Size: 456K.	Schematic, Revision D3 (unrestored). Source: scan from The ADAM Technical Manual (Rich Drushel). Size: 404K.
Component Location/Identification Drawing, Revision D3 (unrestored). Source: scan from The ADAM Technical Manual (Rich Drushel). Size: 300K.

Gamma-Delta Buffer/Interconnect Board

Schematic, Revision E (unrestored). Source: scan from The ADAM Technical Manual (Rich Drushel). Size: 316K.	Component Location/Identification Drawing, Revision E (unrestored). Source: scan from The ADAM Technical Manual (Rich Drushel). Size: 148K.

Linear Power Supply (Printer)

Schematic, Revision E (unrestored). Source: 6-part scan of full-sized blueprint photocopy (Richard Clee). Size: 304K.	Schematic, Revision D (unrestored). Source: scan from The ADAM Technical Manual (Rich Drushel). Size: 252K.
Component Location/Identification Drawing, Revision C (unrestored). Source: scan from The ADAM Technical Manual (Rich Drushel). Size: 200K.	Sub-Assembly Drawing, Revision D1 (unrestored). Source: scan from The ADAM Technical Manual (Rich Drushel). Size: 272K.

SmartWriter Printer Controller (ADAMnet)

Schematic, Revision A1, production release (unrestored). Source: 6-part scan of full-sized blueprint photocopy (Richard Clee). Size: 316K.	Schematic, Revision K, for tooling only (unrestored). Source: 6-part scan of full-sized blueprint photocopy (Richard Clee). Size: 368K.

Keyboard Controller (ADAMnet)

Schematic, Revision D (info boxes partially restored). Source: scan of legal-sized photocopy included with surplus keyboard purchased in early 1990s from American Design Components (Rich Drushel). Size: 236K.

Digital Data Drive, Servo Board

Schematic, Coleco final version with stall circuit, 1984 Revision A (unrestored). Source: 6-part scan of full-sized blueprint photocopy (Richard Clee). Size: 292K.	Schematic, Coleco initial version, 1983 Revision D (unrestored). Source: composite of scans of 2 letter-sized photocopies (Rich Drushel). Size: 344K.
Schematic, H&R version, equivalent to Coleco 1983 Revision D (unrestored). Source: scan of letter-sized photocopy, page 1 of 2 (Rich Drushel). Size: 232K.	Schematic, Videogaming & Computer News version, equivalent to Coleco 1983 Revision D (unrestored). Source: scan of page 28, March/April 1988 issue (Rich Drushel). Size: 312K.

Digital Data Drive, Read-Write Board

Schematic, Coleco version, Revision C (unrestored). Source: composite of scans of 2 letter-sized photocopies (Rich Drushel). Size: 316K.	Schematic, H&R version, equivalent to Coleco Revision C (unrestored). Source: scan of letter-sized photocopy, page 2 of 2 (Rich Drushel). Size: 264K.
Schematic, Videogaming & Computer News version, equivalent to Coleco Revision C (unrestored). Source: scan of page 27, March/April 1988 issue (Rich Drushel). Size: 304K.

160K SS-DD Floppy Disk Drive Controller (ADAMnet)

Schematic, Coleco version, Revision A2 (fully restored). Source: 6-part scan of full-sized blueprint photocopy (Richard Clee). Size: 388K.	Schematic, MPI version, equivalent to Coleco Revision A (unrestored). Source: scan of letter-sized photocopy (Geoff Oltmans). Size: 280K.

64K Memory Expander

Schematic, Reverse-Engineered from "Gamma" Logic Board Schematic (fully restored). Source: scan of schematic made with MacPaint 1.0 on 22 February 1991 (Rich Drushel). Size: 284K.

Prototype Serial/Parallel Interface (ADAMnet)

Schematic, Prototype (unrestored). Source: scan of letter-sized photocopy (Rich Drushel). Size: 332K.

Orphanware Real-Time Clock Board

Schematic, Revision F (fully restored). Source: converted from CLOCK.PRN, a Panasonic-compatible printer dump file, which was part of the CLOCK14.ARC Orphanware clock software archive (Rich Drushel). Size: 84K.