Previous Thread
Next Thread
Print Thread
#1067509 - 08/03/20 05:38 PM ADS Super Chip - Reverse Engineered  
Joined: Jun 2004
Posts: 365
Bitflipper Offline
15+ Year
Bitflipper  Offline
15+ Year

Joined: Jun 2004
Posts: 365
Las Vegas, NV
A member on this forum who purchased a L69/ZZ4 Hybrid PROM from me was previously running the once coveted ADS Super Chip. He was curious to see if I could read the ADS Super Chip to see what was behind it. Easier said than done. First, two pins snapped off during removal from the PROM carrier and dremel'ing was required to expose enough metal to solder on make-shift pins. Then beyond that, ADS used 82S181 1Kx8 single write PROMs. The modern GQ-4X EPROM burner needs two pins bent up and redirected in order to read the 82S181 as a MOSTEK MK2716. Procedure here:

82S181 as MK2716

Turns out that the ADS Super Chip is a close match to the original L69 chip with a few modest modifications. It doesn't compare nearly as closely to the ZZ4 chip.

Here is a link to my findings

ADS Super Chip

If you want to burn it to a TMS2532JL, you can take ADS_1K.bin and build it into a 4K file according to the procedure posted by Plaz many years ago.

There is a jpg in that folder of the hacks required to read the 82S181.

Two text files are in that folder to show the differences between L69/ADS and ZZ4/ADS. Where the line starts with a bunch of asterisks, there is no change. Where the line looks something like this:

3003: 8C -> BC - 3003: BC FCB $BC ; INSTALLED EQUIPMENT 3

It means ADS changed the original value to 0xBC in this case.

For the ZZ4 comparison I used by Hybrid binary, not the original ZZ4 binary. Worth noting in this case - ADS did NOT delete the spark advance that gets added when you plug in an ALDL scanner, unlike my Hybrid. smile

302F: 00 -> 17 - 302F: 17 FCB $17

Maybe someone will find this interesting, if really just academic at this point. I recommend the ZZ4 chip over the ADS chip for sure.

[Linked Image]
#1067519 - 08/03/20 11:08 PM Re: ADS Super Chip - Reverse Engineered [Re: Bitflipper]  
Joined: May 2007
Posts: 114
1988SS Offline
10+ Year
1988SS  Offline
10+ Year

Joined: May 2007
Posts: 114
Georgetown, TX
Dylan, Thanks for taking the time to read the chip and share the info. I had run that chip in my car since Dec 1988.


1988 Monte Carlo SS

Random Images
by Billdo38
by Robb77
by kpetry
by MY FYN 79
by 87/88 SS's

Recent Contributors
Authorized Vendors
Tell them you saw it
Dixie Monte Carlo Depot
GSI Interiors
Mikes Montes
Savitske Classic & Custom
Powered by UBB.threads™ PHP Forum Software 7.6.0