How to change the marquee display between the speakers?

[jay]

Depending on what you have......
You would read the contents of the chip using a Eprom Burner (usb connected, with supplied software)
Secondly you would edit the Hex bytes using the supplied editor, then write back out to a blank chip.

[SK8US]

I did it --- I got rid of Sheila, my wife wont be suspicious now when I go into the game room. I swapped out the chips, now it says accepting 1s 5s, etc. I would like to edit it though. So where would I get the software? I would use my laptop and plug into the black box? Or do I take the chip out and put into some kind of reader?
Scott

[Railroad94]

Sheila gone but not forgotten.     As Jay said you need to get the chip in a reader and see if you can edit in some of your info.
Not knowing that type of unit but a guess on the chip might be a 29F040 maybe?

[SK8US]

Not sure about chip types but its a 24 pin chip like a S+ game chip. Scott

[stayouttadabunker]

it would good if you under the sticker paper that's stuck to the top if and
see what is written directly upon the chip.
This information should tell you three things:
 
make  >>>( ST, AM,TMS, etc, etc...)
size    >>>(64, 128, 256, 512, 1meg, etc, etc...)
speed>>>(ns)

Be sure to cover up the round glass with the sticker paper after you jot down the numbers.
I think most S+'s have 28-pins for the SS and SP chip sockets.

[brichter]

Just give the part number (should be a string like 27C512 or 27c4001, the last 4 numbers will vary due to size and format), the size may not be on the chip.

[SK8US]

Hi, It looks like
AM27C512
-90DC  
0127??DE
@ 1986 AMD

This is Sheilas chip. Hard to read

[brichter]

To attempt to change it, you'll need an eprom burner and a UV eraser. The eraser and burner together will be $125 for inexpensive ones, you can search for "eprom burner" on this site for models and prices. You also may find a thread or 2 on how to find and edit that message.

The 27C512 is a 512k eprom, the -90DC means it's a 90ms access speed. This is a very common eprom and supported by virtually all eprom burners.

Welcome to the modification addiction!  

[SK8US]

Thank you all for your help so know I can put whatever measage I want on the display and know what chip to burn. Thanks, Scott

[jay]

Where did you get the replacement NON Sheila version of the chip ?

Incidently you could explain that this is an Austrailan machine ..... and that Sheila is a generic name for any girl ...... FiddleFarter (Sharron) can chime in here anytime now.....

[SK8US]

I have an extra black box that read MGM on its chip so I exchanged them now Sheila is gone. I put Sheila in the extra box.
Thanks for explaining it all for me. Scott