Hard Drivin GSP time out error

I didn't make any notes when i fixed the one i have here. It was giving some kind of time out error in test mode. IIRC, it would boot ok, but reboot when you coined it up.
Now, having said that, i do remember it was a bad ram. Again, going from memory, the ram was marked ti 4464, which i couldn't find anywhere. I think i ended up matching it to a 41464. Pulled and socketed them and replaced them until the error went away. YMMV.
 
Thanks, yeah I did check the manual but it didn't mention this specific error, or did I overlook it ?

Are the RAMs socketed by any chance (probably not).
 
rams aren't socketed. I think i determined it was the ram by running through the self tests.
 
if your thinking a 28 pin .6" wide 6264, no dice. These are .3" 18 pin. I had a hard time crossing the 4464 number on them. IIRC, they were tm4464s. They crossed to a 41464, not a 6264. I'm not even sure though that i had the same error. Have you run the self tests?
 
But I could last sunday....

You guys were obviously right...3 bad VRAMs.

Now, are the 41464 pin-compatible replacements ? And if so, where do I get them ?

[Edit] Found some on e-bay....
 

Attachments

  • IMG_0072.jpg
    IMG_0072.jpg
    60.4 KB · Views: 52
  • IMG_0073.jpg
    IMG_0073.jpg
    85.3 KB · Views: 91
Last edited:
OK I found the RAMs are available on E-bay.

I've been looking for the 2nd HD today, and it's cosmetically in a MUCH better condition.
However, the monitor only showed some undefinable stuff.
When I credited it, I could hear the "ping" sound fine. When started the game, there is NO sounds.
Fiddled with the potmeter but that's not it (or else I wouldn't hear the "ping"..)

The steering wheel DID move around sometimes (attract) though...

Looked at the main PCB, and the 4 led's that are next to each other were ALL lit.

Does that mean that the board-set is working ?
 
yes the 41464's are pin compatible replacements. I really think that atari had those intentionally misprinted to confuse bootleggers.
I would double check though to be sure those are actually the correct rams that need replacing - i'm going from memory and while those are the correct ram replacements for 4464's, i'm not sure that the rams you have bad are even on the same pcb.
The ones i got came from Jameco, fwiw. I went and dug my pcb out and took a look a it. There are a total of 4 4464's on the pcb. The ones showing bad on the pics are tms4461-15's - which are a whole different animal - those are 24 pin .4" wide chips. Here's some of them on ebay -
http://www.ebay.com/itm/ONE-TI-TMS4...659?pt=LH_DefaultDomain_0&hash=item5635a4749b
 
Last edited:
Thanks CDJUMP, Excellent info !!!

Do you have an idea about how the row of 4 LED's on the main PCB are behaving when the games runs normally ?

Should all 4 be lit ?

It's such a shame that both the monitor AND the sound were dead on the 2nd cab, I have a feeling the board-set was actually running...
 
Worked with some friends on the HD's today.

Because both HD's had monitor issues (one was happily burning away it's HVT, the other has bad sync problems) we first hooked up a VGA monitor using one of those cheap Chinese CGA/EGA to VGA converter boards. Excellent little things, worth every cent !

web.jpg


We got picture with self test screens OK on it. Although it chopped off the left-most part of the picture, it was definitely workable. (Probably could have fixed it if we had tinkered with the settings, but we decided to spend the time on getting some HD boards running.

We first ran the tests and sure enough 3 of the VRAMs were indicated as bad. We then piggybacked all three and ran the test again, to our own slight amazement, we were left with only one bad ram, so the other two were successfully piggy-backed.
For the third one we assumed there had to be a short in that one, preventing the piggy backed RAM to work, so with snapped out the body of the old IC and then piggy-backed the new one again, and we had a 100% success !! All VRAMs working !

Not this HD still had some sound problems indicated which we will need to investigate further, but at least we could start up the game, see attract mode running fine, credit it and start a game by turning the key. The gas-pedal didn't seem to work though as the car never moved from it's spot. The steering wheel does weird things to, but that's all for later.

The 2nd HD had more problems on the PCB's. It also had four VRAMs indicated as bad. Again, the piggy-back trick helped and again we had to snap off one body to get it to pass the tests.

However, this set also gave errors on the ADP board. I made a picture:

web.jpg


All the red one's are supposedly dead RAMs.
However this type of RAM seems completely unfamiliar to me.
On the chip it says: hm3-65768m-5
In the schematics (From Jed Margolin) it says that these are 8168D45 RAMs.

Any idea where to get these or what chips are equivalent ?
 
OK I found a pretty cheap source for HM3-65768BK-5 RAMs in Germany, checked the data sheet and the K means that it's faster than the M version. Don't know what the B stands for though...but I guess they will be OK.
 
Nice pic of the two "brothers":

web.jpg


Some random video stuff:



I replaced 3 RAM chips on the main board of this PCB set and then it worked fine:



The other PCB board set also had 4 defective RAMs on the main board. Replaced those and now it passes the tests fine. However, it also had 4 defective RAMs on the ADSP board. Replaced those and they show fine in the test, however, 3 more have gone bad in the couple of time I powered it up....will be worked on by the new owner of the second HD....

The monitors I examined all caps with my Russian ESR meter and replaced all the bad one's (not that many, 5 on one chassis, 3 on the other.

Stupidly I forgot that the HOTs need a mica insulator. I had removed the old thermal grease on chassis and transistors and stupidly mounted them back without mica's (there was some weeks time between removing and re-installing). Naturally the fuse blew when we tried one chassis....duh !!! Need to replace fuse and install micas and give it another try....

Anyway, there is good progress :)
 
Last edited:
Where is the "like" button? :)

And thanks for posting pics and logs. I will bookmark this for when my Hard Drivin' (running Race Drivin' board set) compact eventually fails.
 
Back
Top Bottom