From Newsgroup: rec.games.pinball

Hi All,

Working on a Stargate, Gottlieb system 3. No DMD. Here is a video on power up: https://drive.google.com/file/d/16SLt6WxaBFptazN5ogFyREKgPEXx_02_/view?usp=sharing

I believe it is the U8 GAL chip on dmd comtroller.
Let me know what you think.

The +5 volts is good. It also has the version 4 on main controller.

Thanks,

John
--- Synchronet 3.18c-Win32 NewsLink 1.113

From Newsgroup: rec.games.pinball

On 2021/03/08 11:53 a.m., Grojohn wrote:

Hi All,

Working on a Stargate, Gottlieb system 3. No DMD. Here is a video on power up:
https://drive.google.com/file/d/16SLt6WxaBFptazN5ogFyREKgPEXx_02_/view?usp=sharing

I believe it is the U8 GAL chip on dmd comtroller.
Let me know what you think.

The +5 volts is good. It also has the version 4 on main controller.

Thanks,

John

Not sure it is the GAL, have you monitored the outputs using a logic
probe? If some or all are dead and yet there are in puts then it might
be bad.

I do sell licensed copies of the GAL.

https://flippers.com/catalog_oc/index.php?route=product/product&product_id=2802&search=gal

Note that if the video board isn't working then the MPU won't fire up
either.

We also service System 3 boards using the Gottlieb test fixture and
EPROMs...

John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
--- Synchronet 3.18c-Win32 NewsLink 1.113

From Newsgroup: rec.games.pinball

On Monday, March 8, 2021 at 2:56:32 PM UTC-6, John Robertson wrote:

On 2021/03/08 11:53 a.m., Grojohn wrote:

Hi All,

Working on a Stargate, Gottlieb system 3. No DMD. Here is a video on power up:
https://drive.google.com/file/d/16SLt6WxaBFptazN5ogFyREKgPEXx_02_/view?usp=sharing

I believe it is the U8 GAL chip on dmd comtroller.
Let me know what you think.

The +5 volts is good. It also has the version 4 on main controller.

Thanks,

John

Not sure it is the GAL, have you monitored the outputs using a logic
probe? If some or all are dead and yet there are in puts then it might
be bad.

I do sell licensed copies of the GAL.

https://flippers.com/catalog_oc/index.php?route=product/product&product_id=2802&search=gal

Note that if the video board isn't working then the MPU won't fire up either.

We also service System 3 boards using the Gottlieb test fixture and EPROMs...

John :-#)#

--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

Hi John!
What output logics are you taking about? I do have a scope I can use. I have manual.
Also, all my voltages are good on DMD, DMD controller, and MPU.
I hate shotgunning a problem.
--- Synchronet 3.18c-Win32 NewsLink 1.113

From Newsgroup: rec.games.pinball

On 2021/03/08 2:59 p.m., Grojohn wrote:

On Monday, March 8, 2021 at 2:56:32 PM UTC-6, John Robertson wrote:

On 2021/03/08 11:53 a.m., Grojohn wrote:

Hi All,

Working on a Stargate, Gottlieb system 3. No DMD. Here is a video on power up:
https://drive.google.com/file/d/16SLt6WxaBFptazN5ogFyREKgPEXx_02_/view?usp=sharing

I believe it is the U8 GAL chip on dmd comtroller.
Let me know what you think.

The +5 volts is good. It also has the version 4 on main controller.

Thanks,

John

Not sure it is the GAL, have you monitored the outputs using a logic
probe? If some or all are dead and yet there are in puts then it might
be bad.

I do sell licensed copies of the GAL.

https://flippers.com/catalog_oc/index.php?route=product/product&product_id=2802&search=gal

Note that if the video board isn't working then the MPU won't fire up
either.

We also service System 3 boards using the Gottlieb test fixture and
EPROMs...

John :-#)#

--

Hi John!
What output logics are you taking about? I do have a scope I can use. I have manual.
Also, all my voltages are good on DMD, DMD controller, and MPU.
I hate shotgunning a problem.

Assuming you have the schematics check the U8 GAL outputs and inputs (as
shown on the schematics) for outputs.

Shotgunning is rarely very good, except possibly recaps on tube and
early transistor amps and the odd monitor chassis.

John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
--- Synchronet 3.18c-Win32 NewsLink 1.113

From Newsgroup: rec.games.pinball

On Monday, March 8, 2021 at 8:05:16 PM UTC-5, John Robertson wrote:

On 2021/03/08 2:59 p.m., Grojohn wrote:

On Monday, March 8, 2021 at 2:56:32 PM UTC-6, John Robertson wrote:

On 2021/03/08 11:53 a.m., Grojohn wrote:

Hi All,

Working on a Stargate, Gottlieb system 3. No DMD. Here is a video on power up:
https://drive.google.com/file/d/16SLt6WxaBFptazN5ogFyREKgPEXx_02_/view?usp=sharing

I believe it is the U8 GAL chip on dmd comtroller.
Let me know what you think.

The +5 volts is good. It also has the version 4 on main controller.

Thanks,

John

Not sure it is the GAL, have you monitored the outputs using a logic
probe? If some or all are dead and yet there are in puts then it might
be bad.

I do sell licensed copies of the GAL.

https://flippers.com/catalog_oc/index.php?route=product/product&product_id=2802&search=gal

Note that if the video board isn't working then the MPU won't fire up
either.

We also service System 3 boards using the Gottlieb test fixture and
EPROMs...

John :-#)#

--

Hi John!
What output logics are you taking about? I do have a scope I can use. I have manual.
Also, all my voltages are good on DMD, DMD controller, and MPU.
I hate shotgunning a problem.

Assuming you have the schematics check the U8 GAL outputs and inputs (as shown on the schematics) for outputs.

Shotgunning is rarely very good, except possibly recaps on tube and
early transistor amps and the odd monitor chassis.
John :-#)#

--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

The CPU board has not powered up correctly.
The LED is blinking to fast. Disconnect the DMD controller board from the CPU and see if the CPU powers up correctly.
--- Synchronet 3.18c-Win32 NewsLink 1.113

From Newsgroup: rec.games.pinball

On Tuesday, March 9, 2021 at 6:00:03 AM UTC-6, gtriley@yahoo.com wrote:

On Monday, March 8, 2021 at 8:05:16 PM UTC-5, John Robertson wrote:

On 2021/03/08 2:59 p.m., Grojohn wrote:

On Monday, March 8, 2021 at 2:56:32 PM UTC-6, John Robertson wrote:

On 2021/03/08 11:53 a.m., Grojohn wrote:

Hi All,

Working on a Stargate, Gottlieb system 3. No DMD. Here is a video on power up:
https://drive.google.com/file/d/16SLt6WxaBFptazN5ogFyREKgPEXx_02_/view?usp=sharing

I believe it is the U8 GAL chip on dmd comtroller.
Let me know what you think.

The +5 volts is good. It also has the version 4 on main controller. >>>
Thanks,

John

Not sure it is the GAL, have you monitored the outputs using a logic
probe? If some or all are dead and yet there are in puts then it might >> be bad.

I do sell licensed copies of the GAL.

https://flippers.com/catalog_oc/index.php?route=product/product&product_id=2802&search=gal

Note that if the video board isn't working then the MPU won't fire up >> either.

We also service System 3 boards using the Gottlieb test fixture and
EPROMs...

John :-#)#

--

Hi John!
What output logics are you taking about? I do have a scope I can use. I have manual.
Also, all my voltages are good on DMD, DMD controller, and MPU.
I hate shotgunning a problem.

Assuming you have the schematics check the U8 GAL outputs and inputs (as shown on the schematics) for outputs.

Shotgunning is rarely very good, except possibly recaps on tube and
early transistor amps and the odd monitor chassis.
John :-#)#

--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

The CPU board has not powered up correctly.
The LED is blinking to fast. Disconnect the DMD controller board from the CPU and see if the CPU powers up correctly.

Ok, here is LED status on mpu:

with everything hooked up: flashes 8 times real quick, pauses, then repeats with DMD board disconnected: flashes 4 times real quick, pauses, then repeats with DMD and driver board disconnected: flashes about 30 times real quick, pauses, then flashes 4 times, pauses, then repeats the 4 flashes


I'm going to look at U8 in/outputs today...
--- Synchronet 3.18c-Win32 NewsLink 1.113

From Newsgroup: rec.games.pinball

On Tuesday, March 9, 2021 at 7:44:27 AM UTC-6, Grojohn wrote:

On Tuesday, March 9, 2021 at 6:00:03 AM UTC-6, gtr...@yahoo.com wrote:

On Monday, March 8, 2021 at 8:05:16 PM UTC-5, John Robertson wrote:

On 2021/03/08 2:59 p.m., Grojohn wrote:

On Monday, March 8, 2021 at 2:56:32 PM UTC-6, John Robertson wrote:

On 2021/03/08 11:53 a.m., Grojohn wrote:

Hi All,

Working on a Stargate, Gottlieb system 3. No DMD. Here is a video on power up:
https://drive.google.com/file/d/16SLt6WxaBFptazN5ogFyREKgPEXx_02_/view?usp=sharing

I believe it is the U8 GAL chip on dmd comtroller.
Let me know what you think.

The +5 volts is good. It also has the version 4 on main controller. >>>
Thanks,

John

Not sure it is the GAL, have you monitored the outputs using a logic >> probe? If some or all are dead and yet there are in puts then it might
be bad.

I do sell licensed copies of the GAL.

https://flippers.com/catalog_oc/index.php?route=product/product&product_id=2802&search=gal

Note that if the video board isn't working then the MPU won't fire up >> either.

We also service System 3 boards using the Gottlieb test fixture and >> EPROMs...

John :-#)#

--

Hi John!
What output logics are you taking about? I do have a scope I can use. I have manual.
Also, all my voltages are good on DMD, DMD controller, and MPU.
I hate shotgunning a problem.

Assuming you have the schematics check the U8 GAL outputs and inputs (as shown on the schematics) for outputs.

Shotgunning is rarely very good, except possibly recaps on tube and early transistor amps and the odd monitor chassis.
John :-#)#

--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

The CPU board has not powered up correctly.
The LED is blinking to fast. Disconnect the DMD controller board from the CPU and see if the CPU powers up correctly.

Ok, here is LED status on mpu:

with everything hooked up: flashes 8 times real quick, pauses, then repeats with DMD board disconnected: flashes 4 times real quick, pauses, then repeats
with DMD and driver board disconnected: flashes about 30 times real quick, pauses, then flashes 4 times, pauses, then repeats the 4 flashes

I'm going to look at U8 in/outputs today...

ok, got the scope results:
pin 1- nice square wave
pin 2 - nothing
3 R/W- pulse , kinda shitty
4 not used
5 A11 shitty pulse signal
6 A12 same as above
7 A13 same as above
8 A14 same as above
9 A15 same as above


11 DE pulse shitty
12 DCLK high signal
13 A18 low signal
14 IPORT low signal
15 OPORT low signal
16 FIXED low signal
17 RAM low
18 ROM low
19 CRTC low

No pulse signals on pins 11-19.
I think the U8 GAL is bad....
--- Synchronet 3.18c-Win32 NewsLink 1.113

From Newsgroup: rec.games.pinball

On Tuesday, March 9, 2021 at 8:41:26 AM UTC-6, Grojohn wrote:

On Tuesday, March 9, 2021 at 7:44:27 AM UTC-6, Grojohn wrote:

On Tuesday, March 9, 2021 at 6:00:03 AM UTC-6, gtr...@yahoo.com wrote:

On Monday, March 8, 2021 at 8:05:16 PM UTC-5, John Robertson wrote:

On 2021/03/08 2:59 p.m., Grojohn wrote:

On Monday, March 8, 2021 at 2:56:32 PM UTC-6, John Robertson wrote:

On 2021/03/08 11:53 a.m., Grojohn wrote:

Hi All,

Working on a Stargate, Gottlieb system 3. No DMD. Here is a video on power up:
https://drive.google.com/file/d/16SLt6WxaBFptazN5ogFyREKgPEXx_02_/view?usp=sharing

I believe it is the U8 GAL chip on dmd comtroller.
Let me know what you think.

The +5 volts is good. It also has the version 4 on main controller.

Thanks,

John

Not sure it is the GAL, have you monitored the outputs using a logic
probe? If some or all are dead and yet there are in puts then it might
be bad.

I do sell licensed copies of the GAL.

https://flippers.com/catalog_oc/index.php?route=product/product&product_id=2802&search=gal

Note that if the video board isn't working then the MPU won't fire up
either.

We also service System 3 boards using the Gottlieb test fixture and >> EPROMs...

John :-#)#

--

Hi John!
What output logics are you taking about? I do have a scope I can use. I have manual.
Also, all my voltages are good on DMD, DMD controller, and MPU.
I hate shotgunning a problem.

Assuming you have the schematics check the U8 GAL outputs and inputs (as
shown on the schematics) for outputs.

Shotgunning is rarely very good, except possibly recaps on tube and early transistor amps and the odd monitor chassis.
John :-#)#

--
(Please post followups or tech inquiries to the USENET newsgroup) John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 (604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

The CPU board has not powered up correctly.
The LED is blinking to fast. Disconnect the DMD controller board from the CPU and see if the CPU powers up correctly.

Ok, here is LED status on mpu:

with everything hooked up: flashes 8 times real quick, pauses, then repeats
with DMD board disconnected: flashes 4 times real quick, pauses, then repeats
with DMD and driver board disconnected: flashes about 30 times real quick, pauses, then flashes 4 times, pauses, then repeats the 4 flashes

I'm going to look at U8 in/outputs today...

ok, got the scope results:
pin 1- nice square wave
pin 2 - nothing
3 R/W- pulse , kinda shitty
4 not used
5 A11 shitty pulse signal
6 A12 same as above
7 A13 same as above
8 A14 same as above
9 A15 same as above

11 DE pulse shitty
12 DCLK high signal
13 A18 low signal
14 IPORT low signal
15 OPORT low signal
16 FIXED low signal
17 RAM low
18 ROM low
19 CRTC low

No pulse signals on pins 11-19.
I think the U8 GAL is bad....

Repaired - U8 GAL fixed it.
--- Synchronet 3.18c-Win32 NewsLink 1.113