[Coco] 32K carts?

[Joe]

32K full external CARTRIDGES not the internal rom.
BTW thats not the number on the Rampage rom.
As a matter of fact I've googled every number on the cart rom with no 
results.

----- Original Message ----- 
From: <jdaggett at gate.net>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Tuesday, October 23, 2007 12:44 PM
Subject: Re: [Coco] 32K carts?


> Joe
>
> per the service manual IC2 is:
>
> uPD27C256D-20 or uPD23C256EC
>
>
> james
>
>
> On 23 Oct 2007 at 12:35, Joe wrote:
>
>> Any first hand info on 32K carts? I would assume they are the same but
>> you know what happens when you ass u me! Worst case is I'll have to
>> trace the pins and make sure they go to where I think they should.
>>
>> ----- Original Message ----- 
>> From: <jdaggett at gate.net>
>> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
>> Sent: Tuesday, October 23, 2007 11:48 AM Subject: Re: [Coco] 32K
>> carts?
>>
>>
>> > The internal ROM in the Coco 3 is a 27256.
>> >
>> > james
>> >
>> > On 23 Oct 2007 at 10:48, Joe wrote:
>> >
>> >> That is interesting. I wonder now if all the 32K images floating
>> >> around the net are backward like that. When I was working on
>> >> getting these running I jut assumed the images were correct and my
>> >> MMU emulation was off. now I'm not sure. I've got a real Rampage!
>> >> cart. Does anyone know if the chip inside it is pin compatible with
>> >> a 27256. I'll try to pry it out and read it on an external Eprom
>> >> programmer.
>> >>
>> >>
>> >> ----- Original Message ----- 
>> >> From: "Mark McDougall" <msmcdoug at iinet.net.au>
>> >> To: "CoCoList for Color Computer Enthusiasts"
>> >> <coco at maltedmedia.com> Sent: Tuesday, October 23, 2007 5:37 AM
>> >> Subject: Re: [Coco] 32K carts?
>> >>
>> >>
>> >> > Joe wrote:
>> >> >
>> >> >> When you switch to 32K External it gets wierd.
>> >> >> $C001 to Whatever is mapped to the first 16K of the ROM and
>> >> >> $8000 to $C000 maps to the last 16K of the ROM. This makes sense
>> >> >> as any code running from rom say at $C??? would need to turn on
>> >> >> 32K External mode, but when that happens if it was a liner map
>> >> >> the code that was executing would "jump up" 16K.
>> >> >
>> >> > Thanks Joe - that's done the trick. I had to swap the upper and
>> >> > lower 16KB in Arkanoid and it runs now! Presumably Rampage has
>> >> > the same issue.
>> >> >
>> >> > I need to order a couple of more passives now to be able to test
>> >> > the flash option and the "Flash2" cart.
>> >> >
>> >> > For those few interested, I'll do some pricing very soon. I've
>> >> > been ultra-busy the last few weeks and have only been able to
>> >> > devote the odd minute here-or-there to this project...
>> >> >
>> >> > Regards,
>> >> >
>> >> > -- 
>> >> > |              Mark McDougall                | "Electrical
>> >> > Engineers do it |  <http://members.iinet.net.au/~msmcdoug>   |
>> >> > with less resistance!"
>> >> >
>> >> > --
>> >> > Coco mailing list
>> >> > Coco at maltedmedia.com
>> >> > http://five.pairlist.net/mailman/listinfo/coco
>> >>
>> >>
>> >> --
>> >> Coco mailing list
>> >> Coco at maltedmedia.com
>> >> http://five.pairlist.net/mailman/listinfo/coco
>> >>
>> >>
>> >> -- 
>> >> No virus found in this incoming message.
>> >> Checked by AVG Free Edition.
>> >> Version: 7.5.488 / Virus Database: 269.15.6/1086 - Release Date:
>> >> 10/22/2007 7:57 PM
>> >>
>> >
>> >
>> >
>> > --
>> > Coco mailing list
>> > Coco at maltedmedia.com
>> > http://five.pairlist.net/mailman/listinfo/coco
>>
>>
>> --
>> Coco mailing list
>> Coco at maltedmedia.com
>> http://five.pairlist.net/mailman/listinfo/coco
>>
>>
>> -- 
>> No virus found in this incoming message.
>> Checked by AVG Free Edition.
>> Version: 7.5.488 / Virus Database: 269.15.6/1086 - Release Date:
>> 10/22/2007 7:57 PM
>>
>
>
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco