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

About the Schematics


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)

'gamma' logic board, sheet 1, rev. E4 'gamma' logic board, sheet 1, rev. E3
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.
'gamma' logic board, component diagram
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)

'gamma' logic board, sheet 2, rev. E4? 'gamma' logic board, sheet 2, rev. E3?
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)

'delta' game board, rev. D4 'delta' game board, rev. D3
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.
'delta' game board, component diagram
Component Location/Identification Drawing, Revision D3 (unrestored).
Source: scan from The ADAM Technical Manual (Rich Drushel).
Size: 300K.

Gamma-Delta Buffer/Interconnect Board

interconnect board, rev. E interconnect board, component diagram
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)

power supply, rev. E power supply, rev. D
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.
power supply component diagram power supply sub-assembly diagram
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)

printer, rev. A1, production version printer, rev. K, tooling only
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)

keyboard controller
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

tape drive servo board, Coleco final version with stall circuit tape drive servo board, Coleco initial version
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.
tape drive servo board, H&R version tape drive servo board, V&CN version
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

tape drive read/write board, rev. XX tape drive read/write board, H&R version
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.
tape drive read/write board, V&CN version
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)

Coleco 160K floppy disk drive controller MPI 160K floppy disk drive controller
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

64K RAM 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)

prototype ADAMnet serial/parallel interface
Schematic, Prototype (unrestored).
Source: scan of letter-sized photocopy (Rich Drushel).
Size: 332K.

Orphanware Real-Time Clock Board

Orphanware clock
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.