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Model Electronic Railway Group

The Leading Society for Model Railway Electronics

Over 50 years of Innovation: 1967-2020

MERG DCC System - Downloads

Last updated 23 September 2019

Copyright for items on this page is retained by the authors identified.


The use or misuse for the sale, design, supply, process, installation, delivery, test, repair, servicing, and alteration of the designs, instructions, computer code, photographs, circuits, and any other information that appear on this web site is entirely at the risk of the user or visitor to the web site. The information is made available in good faith without warranty of any kind strictly on the basis that no liability will attach to the Model Electronic Railway Group (MERG), its officers and members.

These pages are a resource area for projects members are working on or have completed and wished to make publicly available. Some of these projects have resulted in MERG kits but nothing on these pages should be taken as definitive information about the kits, members should check the kit pages for up to date information on the kits.


The files in the matrix below provide the information needed to construct the MERG dcc system. For anyone having trouble downloading the source code .asm files they areincluded in .zip packages.  (The .zip includes all files for the item concerned). For more general information on MERG DCC visit the main DCC page

 

Current MERG DCC system kits

Description
Parts list
Schematic PCB layout Component layout and images Source code
Hex code
CBUS Command Station (CANcmd) Kit 91 - Full zip file
CMD_parts.xls
15-Aug-10
d>CANcmd_sch.pdf
15-Aug-10
CANcmd_pcb.pdf
15-Aug-10
Image CANcmd_j.hex
15-Aug-10
CBUS Hand Controller (CANCAB) Kit 92 - Full zip file
CAB_Insts.pdf
Cab_parts.xls
15-Aug-10
d>CAB1A_sch.pdf
15-Aug-10
CAB1F_pcb.pdf
15-Aug-10
Image CAB1u.asm
15-Aug-10
New Booster (NB1B) Kit 59
Description.pdf
23-Jan-11
Schematic.pdf
23-Jan-11
Layout.pdf
23-Jan-11
Image
17-Aug-07
n/a;
Accessory Encoder (ACE) kit 51 - ace2b.zip
ace2btxt.pdf
1-Apr-03
ace2parts.xls
1-Apr-03
ace2bsch.pdf.
1-Apr-03
ace2bpcb.pdf
1-Apr-03
Image. ace3a.asm
ace3a.hex
18-Jan-06
Accessory decoder (ACC2) Kit 52 - acc.zip
acc2btxt.pdf
1-Apr-03
acc2parts.xls
1-Apr-03
acc5txt.pdf
6-Aug-05
Software description
27-Jan-04
acc2bsch.pdf
1-Apr-03
acc2bpcb.pdf 
4-Jun-03
Image acc4.asm
acc4.hex
6-Aug-05
acc5.asm
acc5.hex
6-Aug-05
dbacc5.asm
dbacc5.hex
11-Nov-01
Accessory decoder for Tortoise etc. (ACC3) Kit 53
  acc3sch.pdf
13-Feb-03
acc3pcb.pdf
13-Feb-03
Image As above

 

Other MERG DCC Projects

Items listed here are projects that have not been produced as kits as well as earlier kits that have been replaced by the current kits above.

Click here for original MERG DCC system overview PDF

Description
Parts list
Schematic PCB layout Component layout Source code
Hex code
Combined Command Station, Booster and Power Supply (BC1A) - bc1a.zip - MERG kit 42 (discontinued)
bc1adoc.pdf
6-Jan-01

bc1apart2.xls
12-Dec-02
bc1asch-e.pdf
7-Apr-04
bc1a-epcb.pdf
7-Apr-04
  bc1a_2.asm
11-Feb-06

bc1a_2.hex
23-Feb-06
Hand Controller - Mark 2 (Available while stocks last) hs2.zip - MERG kit 43
Parts list.xls
24-Feb-03
Schematic.pdf
8-Jan-03
hs2bpcb.pdf
hs2bcut.pdf
8-Jan-03
hs2lbl1.pdf
hs2blay.pdf
8-Jan-03
 
New Booster - NB1A
Description.pdf
12-Feb-09
Schematic.pdf
11-May-10
Layout.pdf
10-May-10
Picture.jpg
17-Aug-07
 
Original Command Station - dcc8.zip
dcc81.pdf
28-Nov-99
dccstn8d.pdf
8-Jul-99
dcc8stnu.pdf
22-Nov-99
  dcc8g.asm
dcc8g.hex
29-Feb-00
Booster (Boost5) - booster.zip
booster.pdf
7-Jul-99
boost5g.pdf
7-Jul-99
b5pwrstg.pdf 
7-Jul-99
b5pcb.pdf.
7-Jul-99
boost5.pcb
   
Hand controller - Mark 1 - hsc.zip
dcc8hscl.pdf 
20-Jan-00
hsparts.xls 10-May-01
hsparts.htm 10-May-01
dcc8hsd.pdf  
29-Jan-01
dcc8hsg3.pdf.
29-Jan-01 
hsspcb.pdf
8-Jul-99
dcc8hsg6.pcb
8-Aug-02
hslbl.pdf
hslblm3.pdf
20-Jan-00
hslblkn.gif
8-Aug-02
 
Accessory Encoder PC adapter board - MERG kit 54 (Discontinued)
APC1_txt.pdf
18-Aug-08
APC1_sch.pdf
10-Nov-05
APC1_pcb.pdf
10-Nov-05
  Ace_PC1.asm
Ace_PC1.hex
18-Aug-08
Auto reverse and cutout module (ARC) arc.zip
arc.pdf
26-Jan-02
arcparts.xls
31-Jan-02
arc1sch.pdf
26-Jan-02
arc1pcb.pdf
26-Jan-02
  arc1.asm
26-Jan-02
arc1.hex
26-Jan-02
Cutout module (BCO1) - BCO1.zip
Description.pdf Schematic.pdf Circuit board.pdf   Software
Hex file,
ASM file
Cut out and detection module (BDC1)
Description .pdf Schematic.pdf Board.pdf Picture.jpg  
Block Occupancy Detector (BOD1)
Description.pdf Schematic.pdf Board.pdf Picture.jpg  
Accessory decoder (ACC6) - revised version for Fulgurex etc point motors
ACC6_txt.pdf
04-Feb-07
ACC6_sch.pdf
04-Feb-07
ACC6_pcb.pdf
04-Feb-07
  Acc6_3.asm
23-Mar-07
Acc6_3.hex
Programmer - prog.zip - MERG kit 41 (Discontinued)
Operating instructions
7-Jan-07
prognlb.pdf
15-Jul-99
progpa~1.pdf
12/12/02
dccprog1.pdf
15-Jul-99
dccprog2.pdf
15-Jul-99
progpcb.pdf 
22-Jul-99
prog.pcb
Box label and cutting template
23-Jun-08
for 16F84 (obsolete)
progg1H.asm
07-Jan-07
progg1H.hexfor 16F628A (current)
progg2K.asm
21-Sep-08
progg2K.hex

MERG DCC Locomotive Decoders

Most of these were produced as kits for a few years but needed very good soldering skills and the reducing price of commercial decoders removed the cost advantage. The dec12/13 series do give very good performance

Description
Parts list
Schematic PCB layout Component layout Source code
Hex code
Loco Decoder dec10-11.zip
decoder2.pdf
26-Apr-00
make101.pdf
26-Apr-00
INTDEC10version103.pdf
3-Feb-01
software desription
27-Jan-04
decod10b.pdf
3-Apr-00
dec10bpc.pdf
7-Apr-00
dec10pc2.pdf
7-Apr-00
decod10 image
7-Apr-00
decod10d.asm
decod10d.hex
8-Feb-01
mbint105.asm
mbint105.hex
27-Jan-04
16f628.asm
1-Apr-03
Small loco decoder - dec10-11.zip
As loco decoder above dec11sch.pdf
14-Jun-00
dec11pcb.pdf
28-Apr-00
dec11pc2.pdf,
20-Apr-00
decod11 image
20-Apr-00
As loco decoder above
Small loco decoder with feedback and stealth - dec12-13.zip
dec131tx.pdf
9-May-02
dec131~1.pdf
10-Jan-03
de12dsch.pdf
27-Apr-01
de12dpcb.pdf
27-Apr-01
 decod12 image
27-Apr-01
dec133a.asm
dec133a.hex
14-Mar-03
Loco decoder with feedback and stealth - dec12-13.zip
As small loco decoder above decod13.pdf
10-May-01
dec13pcb.pdf
10-May-01
  As small loco decoder above
Flash unit - flash.zip
flash.pdf
5-Feb-02
flashsch.pdf
5-Feb-02
flashpcb.pdf
5-Feb-02
  flash12a.asm
17-May-02
flash12a.hex

Mike Bolton