Drive talkin'....

[polderarcade]

Interesting
Compact does that mean upright?
Are the board the same? than really interesting
Don’t have enough posts at jamma plus to look in the for sale section

[level42]

Great tip Béla, thanks !

Mmmm, interesting enough for that price. The sound and ADSP boards from a HD compact should also work on a HD cockpit board set.

Polder, your call if you want to give them a go. If the ADSP works you solved your problem.....

[level42]

There were two versions of Hard Drivin'. First came the Cockpit version like ours. Later a kind of upright cab with a small bench was introduced which is know as the Compact.

The Cockpit has a medium resolution monitor. ut the Compact has low res. This is why the Main board is different and not compatible.
Another difference is that the shifter is "digital" so with switches, unlike the cockpit which has a potmeter for the shifter.

The ADSP was used in early Hard Drivin's. The ADSP II board is used in the Compact AND in later cockpits, so for that reason I thin they are compatible.

There wer more diferent boards between "drivin'" games, since there was also Race Drivin and Airborne.

However, the sound board was the same for ALL Drivin' games.

There is good info here :
http://www.system16.com/hardware.php?id=770

[level42]

I knew I had read it on Jed Margolin's website and is confirms that it is 100% compatible:

quote:

    The ADSP Board uses an Analog Devices ADSP-2100 in a Pin-Grid Array (PGA) package.

    The ADSP II Board is identical to the ADSP Board except it uses the ADSP-2100 in the Plastic-Quad-Flat-Pack (PQFP) package.

    ADSP and ADSP II Boards are electrically and mechanically equivalent.
 
 

[level42]

PM sent to the seller on Jamma+ !

[level42]

So a somewhat belated report.....

Well, it was another night with mixed feelings....

First we tried the chassis that still had the working fly-back. First we had some problems with the HV connection to the tube audibly leaking (sparkly sound). We cleaned the area around the hole in the tube (yes, was pretty dusty...) and that solved it mostly.
However the picture on screen showed still a vertical collapse. We only had a horizontal line and occasionally a couple of lines jumping up and down of that line. At least everything else seems to work
Vertical collapse is reported to be a pretty common problem on the K4900 (The 25K5515 is basically a K4900 adapted for med-res). So...gonna have to do some more research on that one.

Next Bart soldered in a fresh fly-back on the 2nd chassis. Installed it and.......YES we have a working picture and no fire-works on the fly-back
I checked the HV voltage with my trusty vintage Zenith HV meter (also very handy for discharging the tube between sessions) and it was exactly 25kV.
However, the picture was somewhat dim. The canopy over the monitor made that we could make out the picture, but it was sure not as bright as you normally expect.
Turning up the Screen pot on the fly-back made the screen white tinted and show retrace lines (was nice to be able to explain some stuff to Bart ). So....there had to be another issue...

Well, checked the manual (gotta love the iPad) and there are no brightness or contrast controls. However, there is a pot called "Black level".
Turning it showed absolutely zero effect. We took out the chassis and measured the pot while turning it and got the same value at every setting. We verified it on the other chassis and there we did see the resistance values vary as expected when adjusting the pot...

We were somewhat tempted to solder the good pot over, but cold, hunger and time had got the better part of us and so we decided to call it a day.

The next step is replacing all the pots. With hindsight, I had already said that I didn't trust them anymore from the first tests and I should have replaced them right away....
O well, never too late. Investigating what values I need and then ordering them for both chassis.

Tomorrow we will pick up 1 cab anyway, this will also help so I can test the chassis at home...

I have arranged a stylish US kind transport for tomorrow

To be continued...

[Belike]

Any news on those parts from the UK.?

[level42]

Yeah, the seller already put a message on JAMMA+ forum that they are reserved and he sent Polderarcade an e-mail so this looks like it's going to happen !

If the boards work it would solve the problems in one go, let's hope !!

Once again, a golden find by you Béla ! Thanks !!

I just desoldered the suspicious pot and sure enough it is completely bad ! It's funny, you can already feel it when turning the pot there is this grinding feeling, where you expect a smooth feeling (OK, this sounds weird ) but anyway, it immediately tells you there must be something wrong inside.
I measured values way in the 2 Mega Ohms instead of 2K Ohms, whatever I turned the pot to. This is EOL for this pot.
Since they are all of the same type, I suggest we replace them all...I've seen bad pots cause jittery pictures on too many monitors. Maybe a pot-kit is even more important on monitors than a cap-kit

I wouldn't be surprised that the pots that control vertical size etc. are also bad on the other chassis....gonna check now....

[level42]

Today it was home coming day for the Hard Drivin' cockpit !!

I decided we needed some fitting transport for this cab, so I'd called my brother-in-law and ask if he could help me out 



A classic pulling another classic. In fact, the van is OLDER than the Hard Drivin' !!!


If anyone would wonder why Polderarcade's name is POLDER arcade......:


Entering the location we see a familiar bike. The beer-bike !:

[level42]

But we're here on a mission. Eeny-meeny-miny-moo.....


The left one goes in.....it's pretty damn heavy at about 350 kg. !!!! My brother in law tells me his bike (a Harley of course) is about the same weight (!!!)


Better set-it up tightly, it's very windy the last week....


Dog-inspection  :


Although it was dry on the trip to Bart, we didn't trust it and wrapped it with a tarp. Sadly no rubber necking by-passer but hey, the cab is more important than that.....


And off we go.....:


Polder's place maybe showing Holland in it's most essential form:




Where else on earth do you see rivers that are HIGHER than the surrounding grounds ?


Due to lots of rain the past weeks, water levels are really high and a couple of dikes in the North of the Netherlands were actually at danger and people had to be evacuated., you can see the water on the lands....a lonely biker struggles against the wind...


Yesterday they showed video shot from a helicopter to show all the water and when you see that it seems that our country is mostly water with a lot of green patches (like islands) in between....

I learned a good lesson after Eurocade: ALWAYS remove toppers and stuff like that before transport. The HD topper would be a real wind catcher, so we removed it of course:


My brother-in-law is a (half) retired truck driver and so we had a smooth and safe trip home. He's used to much larger stuff
Crossing the Brienenoordbrug at Rotterdam:


....and there it is at it's final destination !:


I was very happy that the Van is powered with LPG as a V8 does drink quite a bit, especially with a trailer behind it.
Only 37 Euro's at the gas-station, that would have been around 100 Euro's with normal petrol 

Anyway, it's home safe and sound !

[Belike]

That car looks like a hearse.
Nice to hear that you finally have HD at home, can't wait to see it running.

[Etienne MacGyver]

Looks like i can pass with the scanner soon 

Great that its on location !

[Superully]

very cool report, andré, love the style of this pickup! nice to see it on location finally, but man, this barely fits in (or can you move the other cabs further to the left?)!

[polderarcade]

Good to see it is on location, leafing space at an other location.
Do you have space to move the cab around to work on it?

When you open up the floor (under the seed let me know )
Need lots of pics of the wiring on that location.
Also can you sent the manuals you have on your ipad by mail to me?

[level42]

very cool report, andré, love the style of this pickup! nice to see it on location finally, but man, this barely fits in (or can you move the other cabs further to the left?)!

The HD is not wider than an upright cab so I had measured it before moving the cabs to the left. The Puckman of course had left and there already was some space left over space on that side. I can indeed still move the cabs to the left enough to make it fit better. However on the other far side is my SW cockpit and because I still have to work on a number of Amplifone boards and a WG6100 I ned to be able to reach the back so I cant put the cabs tightly to that one. However, Im sure I can move them enough and still be able to reach it.
The small problem with the HD is that you cant put it straight to a wall on the right side because the chair (and the metal support) move outside of the right side to get "into" it.
Thats why it is now a bit angled to the wall...

to work on it I will have to move it into the path between the cabs (or outside with good weather).

I have been thinking of moving two uprights i to the space the HD needs now and move the HD there so that it is along the smaller wall which would make it easier to work on.....we'll see...

It isnt ideal, but I will have to live with it, and I dont regret getting it all, Its going to be one of the highlights in the gameroom.

I think there should even be room for the Lunar Lander but thats when I will "never" have to reach behind the SW cockpit anymore (ie. I need a vector signal generator.... and a serious workplace which will be realised this summer !)