Re: Major Havoc fluke 9010a rom testing

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
>
> Do a write to 1740 = 01
>
> Rom 2000-3FFF still get 2057
>
> So then I did a Read at 1740 and it's showing FF no matter what I write to
> it.
>
> This is a known working board that I'm trying to do this on. I should be
> able to do this right?
>
> Kevin
>
>
> On Tue, Jan 22, 2013 at 6:16 PM, Jess Askey <jess@askey.org> wrote:
>
>> Yes, page 0 and 1 are in one ROM and page 2 and 3 in the other. I
>> didn’t think about that. J
>>
>>
>>
>> *From:* owner-vectorlist@vectorlist.org [mailto:
>> owner-vectorlist@vectorlist.org] *On Behalf Of *Kevin Moore
>> *Sent:* Tuesday, January 22, 2013 5:26 PM
>>
>> *To:* vectorlist@vectorlist.org
>> *Subject:* Re: VECTOR: Major Havoc fluke 9010a rom testing
>>
>>
>>
>> That's what I was thinking.
>>
>> But the sigs are for the two roms.. will I need to split the roms, and
>> run sig calc on the halves to get the right sigs?
>>
>> Kevin
>>
>> On Tue, Jan 22, 2013 at 6:05 PM, Jess Askey <jess@askey.org> wrote:
>>
>> The 2 ROM’s are broken down into 4 pages… so in order to access them….
>>
>>
>>
>> Page 0: Write 00 to 0x1740 then read 0x2000-3fff
>>
>> Page 1: Write 01 to 0x1740 then read 0x2000-3fff
>>
>> Page 2: Write 02 to 0x1740 then read 0x2000-3fff
>>
>> Page 3: Write 03 to 0x1740 then read 0x2000-3fff
>>
>>
>>
>> That should do it for you!
>>
>>
>>
>> *From:* owner-vectorlist@vectorlist.org [mailto:
>> owner-vectorlist@vectorlist.org] *On Behalf Of *Kevin Moore
>> *Sent:* Tuesday, January 22, 2013 4:05 PM
>> *To:* vectorlist@vectorlist.org
>> *Subject:* Re: VECTOR: Major Havoc fluke 9010a rom testing
>>
>>
>>
>> I believe you are correct about FFFF being the range of the 6502, which
>> makes it all the more odd that Quarter Arcade has such a high address
>> listed.
>>
>> http://tech.quarterarcade.com/tech/VM.aspx?g=1669&set=mhavoc
>>
>> Probably just a mistake.
>>
>> The Memory map on the MH Schematics show the Range, and for the Rom/s in
>> question the range should be 2000-3FFF but you have to page between the two
>> somehow, and that's were I'm failing.
>>
>> It looks like the address 1740 is used to page between the two roms, but
>> since I've never had to do that, I'm unable to verify the roms.
>>
>> The Rom at 8000-BFFF and C000-FFFF are not paged and I can check just
>> fine. Mind you that this is all on the Alpha processor. Not the Gamma I
>> haven't gotten that far as of yet.
>>
>> Kevin
>>
>> On Tue, Jan 22, 2013 at 3:55 PM, Andre Huijts <a.huijts@upcmail.nl>
>> wrote:
>>
>> Its not outside the Fluke's range, it's outside the 6502 range....8 bit
>> processor is FFFF max.
>> Or am I missing something ?
>>
>>
>>
>> Op 22 jan. 2013 om 21:54 heeft Kevin Moore <talon.k@gmail.com> het
>> volgende geschreven:
>>
>>
>> > So I'm trying to work on a major havoc, but I'm not to clear on how to
>> run rom checks on the paged roms..
>> >
>> > Quarter Arcades site has the rom range 10000-13FFF for 136025-215, but
>> the address range is outside the flukes range. Looks like to me the
>> actually address should start at 2000-3FFF. I'm not at all familiar with
>> the MMUPAGE0 addressing.
>> >
>> > Any pointers, or information I can read?
>> >
>> > Thanks,
>> >
>> > Kevin
>> >
>>
>>
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>>
>>
>>
>
>
>

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Received on Tue Jan 22 23:39:47 2013