Re: Major Havoc fluke 9010a rom testing

This is the first time I've ever had to disable the watchdog to read a rom,
but then it's the first time I've had to do a write to an address to read
rom too.

Kevin

On Wed, Jan 23, 2013 at 12:13 AM, David Shoemaker <davids@oz.net> wrote:

> In general when trying to run memory ir rom tests I find I always need
> to wd disable.
> ------------------------------
> From: Kevin Moore <talon.k@gmail.com>
> Sent: 1/22/2013 8:52 PM
>
> To: vectorlist@vectorlist.org
> Subject: Re: VECTOR: Major Havoc fluke 9010a rom testing
>
> Success..
>
> After splitting the roms, and running Calcsig on them, then tying the WD
> Dis to ground. I was then able to write 00 01 02 etc to 1740 and get the
> MMUPAGE0 1 to toggle..
>
> I'm now able to read the paged roms and get the correct sigs.
>
> Just needed to tie the Watchdog to ground..
>
> Guess someone should let quarterarcade know their script is wrong :)
>
> Solved that problem.
>
> Thanks for all the help.
>
> Kevin
>
>
> On Tue, Jan 22, 2013 at 10:41 PM, Rodger Boots <rlboots2@gmail.com> wrote:
>
>> Make real sure the reset line isn't doing anything. Make sure other
>> processor is off board.
>>
>>
>>
>> On Tue, Jan 22, 2013 at 10:39 PM, Kevin Moore <talon.k@gmail.com> wrote:
>>
>>> Yes it is plugged into the alpha socket. You are correct that 1740 is
>>> write only.. As of yet, trying to use the fluke to write 00 01 02 etc..
>>> hasn't changed the states of the MMUPAGE0 or MMUPAGE1
>>>
>>> Kevin
>>>
>>>
>>>
>>> On Tue, Jan 22, 2013 at 9:21 PM, vectorlist-steve <
>>> vectorlist@arcadehacking.com> wrote:
>>>
>>>> Hey Kevin, you do have the fluke plugged into the "Alpha" (primary)
>>>> processor socket right????
>>>>
>>>> 0x1740 address should be WRITE ONLY according to the mame source and
>>>> only latches the two LSB bits.
>>>>
>>>> http://mamedev.org/source/src/mame/drivers/mhavoc.c.html
>>>>
>>>> If I have time later I will check one of my MH boards and post the
>>>> results.
>>>>
>>>>
>>>>
>>>> On 1/22/2013 5:51 PM, Kevin Moore wrote:
>>>>
>>>> Well, I must be doing something wrong..
>>>>
>>>> I do a write to 1740 = 00
>>>> then do a rom 2000-3FFF
>>>>
>>>> I come up with a 2057
>>>>
>>>>
> [The entire original message is not included.]
>

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Received on Wed Jan 23 06:32:01 2013