Re: Crystal Castles ROM Address Range

David Shoemaker wrote:
> Hey Clay great description of the issue on this one.
>
> Now do you have any F#(*)$#ing idea how to do that with Williams "classic"
> hardware? Been pulling my hair out for way to long trying to figure out how
> to do it on them. And while I am at it MCR III :)
>
> David
>

If I'm not mistaken Sean Riddle covered bank selecting for Defender and
Stargate (plus later games) on his Williams info. I used that info to do
RAM checks on that hardware.

Not sure of the link, but should be easy to find...

John :-#)#
> -----Original Message-----
> From: techtoolslist-bounces@flippers.com
> [mailto:techtoolslist-bounces@flippers.com] On Behalf Of Clay Cowgill
> Sent: Tuesday, November 20, 2012 8:16 PM
> To: 'Technical Tools Mail List'
> Subject: Re: [Techtoolslist] Crystal Castles ROM Address Range
>
> Crystal Castles uses so-called bank selected memory, meaning that only a
> portion of the total ROM is visible at any given time from a particular
> address range.
>
> >From a quick glance at the schematic, it looks like writing either a
>
>> 0x00 or
>>
> 0x01 to address 0x9E87 will switch banks of ROM. Put another way .1f and
> .1h will appear in memory *or* .1k and .1l. 0xA000 (.1k and .1h) and 0xC000
> (.1l and .1f)
>
> You can write 0x9E87 with 0x00 or 0x01 from the 9010 controls to manually
> switch banks and view/checksum ROM contents.
>
> -Clay
>
>
>> -----Original Message-----
>> From: techtoolslist-bounces@flippers.com
>> [mailto:techtoolslist-bounces@flippers.com] On Behalf Of Justin
>> Johnson
>> Sent: Tuesday, November 20, 2012 7:06 PM
>> To: techtoolslist@flippers.com
>> Subject: [Techtoolslist] Crystal Castles ROM Address Range
>>
>> This is my first post. I'm learning how to use my Fluke 9010 and ran
>> into a problem doing a CRC check on some of the ROMS.
>> Looking in the
>> MAME source code I found the address ranges for each ROM(see
>> below).
>> ROMs 304 to 305 work fine but the address appears to be out of range
>> for ROMs 101 and 102. ROM 101 according to the source code should
>> start at 10000-11FFF. What address should I be using? Where am I
>> going wrong here??
>>
>
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Received on Wed Nov 21 01:16:03 2012