Jump to content
Zak

GEMINI repair E4002 / TIA full pinout comparation

Recommended Posts

Hi! I am repairing a COLECO GEMINI and apparently the E4002 chip (TIA clone) is damaged. I think about the possibility of replacing it with an ATARI TIA remapping the legs, the problem is that I cannot clearly find how I would have to redirect the legs. I found the pinout of each chip but they are named differently. maybe you know about the subject and can help me to achieve a comparison of pins E4002 GEMINI / TIA Atari

e4002 pinout: https://console5.com/wiki/E4002
TIA pinout: https://console5.com/wiki/TIA

 

E4002 GEMINI : TIA Atari

 

pin 1 : 1  (GND)

pin 2 :  ??????

pin 3 : 3 (RDY)

pin 4 : 2 (SYNC)  ??

pin 5 : ?????

pin 6 : ?????

pin 7 : ?????

pin 8 : ?????

pin 9 : ?????

pin 10 : 10 (Color Adjust)

pin 11 : 11 (OSC input)

pin 12 : 14 (DB0)

pin 13 : 15 (DB1)

pin 14 : 16 (DB2)

pin 15 : 17 (DB3)

pin 16 : 18 (DB4)

pin 17 : 19 (DB5)

pin 18 : 33 (DB6)

pin 19 : 34 (DB7)

pin 20 : 20 (Vcc)

pin 21 : 24 (CS0)

pin 22 : 23 (CS1)

pin 23 : 22 (CS2)

pin 24 : 21 (CS3)

pin 25 : 25 (R/W)

pin 26 : 26 (Φ2)

pin 27 : 13 (Sound B)

pin 28 : 12 (Sound A)

pin 29 : 27 (A5)

pin 30 : 28 (A4)

pin 31 : 29 (A3)

pin 32 : 30 (A2)

pin 33 : 31 (A1)

pin 34 : 32 (A0)

pin 35 : 35 (Trigger 1)

pin 36 : 36 (Trigger 0)

pin 37 : 37 (Pot 3)

pin 38 : 38 (Pot 2)

pin 39 : 39 (Pot 1)

pin 40 : 40 (Pot 0)


thank you very much for the help

cc @ChildOfCv

Share this post


Link to post
Share on other sites
2 hours ago, Zak said:

E4002 GEMINI : TIA Atari

pin 1 : 1  (GND)

pin 2 : 4  (Φ0)

pin 3 : 3 (RDY)

pin 4 : 2 (C.SYNC)

pin 5 : 7 (LUMA OUT 2)

pin 6 : 5 (LUMA OUT 1)

pin 7 : 8 (LUMA OUT 0)

pin 8 : 6 (V. Blank)

pin 9 : 9 (COLOR OUTPUT)

pin 10 : 10 (Color Adjust)

pin 11 : 11 (OSC input)

pin 12 : 14 (DB0)

pin 13 : 15 (DB1)

pin 14 : 16 (DB2)

pin 15 : 17 (DB3)

pin 16 : 18 (DB4)

pin 17 : 19 (DB5)

pin 18 : 33 (DB6)

pin 19 : 34 (DB7)

pin 20 : 20 (Vcc)

pin 21 : 21 (/CS3)

pin 22 : 22 (/CS2)

pin 23 : 23 (CS1)

pin 24 : 24 (/CS0)

pin 25 : 25 (R/W)

pin 26 : 26 (Φ2)

pin 27 : 13 (Sound B)

pin 28 : 12 (Sound A)

pin 29 : 27 (A5)

pin 30 : 28 (A4)

pin 31 : 29 (A3)

pin 32 : 30 (A2)

pin 33 : 31 (A1)

pin 34 : 32 (A0)

pin 35 : 35 (Trigger 1)

pin 36 : 36 (Trigger 0)

pin 37 : 37 (Pot 3)

pin 38 : 38 (Pot 2)

pin 39 : 39 (Pot 1)

pin 40 : 40 (Pot 0)

 

Double check using the attached pdf: see pages 31-32 for a descriptions of the pins, and the diagram on page 35 for the active state of the "chip select" pins.

ColecoVision_Expansion_Module_1_Tech_Specs.pdf

  • Thanks 1

Share this post


Link to post
Share on other sites

Thank you very much @alex_79, in these days I will be testing the adaptation. I already have a replacement TIA.

Share this post


Link to post
Share on other sites

i believe you may be able to harvest a replacement one from a coleco expansion module 1.  That is how I repaired mine.

Share this post


Link to post
Share on other sites

Thanks @ArcadeJunkie.  Here in Argentina is more dificult to get an Expansion Module #1 than another Gemini. But, it's not a bad idea to keep in mind that you can get a replacement from there.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...