Re: Asteroids T/S

The DVG test is a simple procedure to manually program the dvg to repeatedly
display a "+" sign in the center of the screen. You can do a lot of trouble
shooting from there, as it's a repeating pattern.

2009/12/20 Kevin Moore <talon.k@gmail.com>

> Well like I said, I'm note 100% sure what I'm doing. As for the SA, I have
> more than 1 board I'm working on, so it would be nice to know how to do for
> other failures. If I have to T/S address lines etc.
>
> As for the Vrom 5000-57ff, and the Vram 4000-47ff both those check good
> with the fluke.
>
> What is the DVG test?
>
> Kevin
>
> 2009/12/20 Mark Shostak <shostakmark@gmail.com>
>
> Kevin,
>>
>> What are you trying to accomplish at this point with SA?
>>
>> You specified you test the roms and ram, but not the vroms and vram.
>>
>> You might continue by:
>> - Testing the VROM sigs (in circuit w/ Fluke)
>> - Testing the VRAM
>> - Running the DVG test
>>
>> -Mark
>>
>>
>> 2009/12/20 Kevin Moore <talon.k@gmail.com>
>>
>> Well after comparing some Tempest Info with Peter's Asteroids SA document,
>>> It shouldn't be all that different. Ground the WGDIS, but typically on the
>>> games I've run SA on, you tie Φ0, and Φ2 together. I'm not finding Φ0. Do
>>> they need to be tied together on Asteroids, and if so, I'm not finding Φ0 on
>>> the schematics as of yet.
>>>
>>> Thanks,
>>> Kevin
>>>
>>> **
>>>
>>> On Sun, Dec 20, 2009 at 1:48 PM, Kevin Moore <talon.k@gmail.com> wrote:
>>>
>>>> I'm also looking for a catbox guide for Asteroids. I found the HP
>>>> version, but I'm guessing the setup may be a bit different.
>>>>
>>>> Thanks,
>>>> Kevin
>>>>
>>>>
>>>>
>>>> On Sun, Dec 20, 2009 at 12:04 PM, Kevin Moore <talon.k@gmail.com>wrote:
>>>>
>>>>> OK so I'm working on an Asteroids board.
>>>>> I'm still pretty new at this and learning more each day, but I would
>>>>> like some feedback/help/teaching on what I'm doing sofar
>>>>>
>>>>> First thing I do is check voltages. Good
>>>>> Next I pull all the Roms, and Check Good
>>>>> Then I use a Fluke 9010 to check the fluke sigs on the roms. Good
>>>>> I did do a Ram test from 3000-4000, with the fluke, I'm not sure if I
>>>>> this is testing all of the ram or not. But that area did check good.
>>>>> Put board in test mode, everything looks good, no beeps no errors.
>>>>> Put the board in game mode, get fast blink, and watchdog barking
>>>>> GND watchdog dis, No go.
>>>>> I pull pin 1 of L6 DMAGO watchdog still barking.
>>>>> So now it's down to MPU problem, and maybe VSM right?
>>>>>
>>>>> Ionpool has listed the following for MPU problems
>>>>> Check the ROMS, RAM and especially the 74LS245 (or AM83048) at E2 (E3
>>>>> on Asteroids).
>>>>> Well I know the roms are good, and I'm not getting beeps in test mode
>>>>> for Ram, and it appears everything that should be toggling on the AM83048 is
>>>>> toggling.
>>>>>
>>>>> But shouldn't using the fluke to run sigs on the roms eliminate the
>>>>> problems with the bus transceiver at E3?
>>>>>
>>>>> That would mean that the problem lies in the VSM right?
>>>>>
>>>>> So now I'm to the point where I'm asking for some assistance.
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Kevin
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>
>

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Received on Mon Dec 21 10:26:37 2009