Re: VIC-20 Cartridge combinations

Hi Mia,

You mentioned some other ML cartridge, is there any existing snapshot image
of that VIC20 ML Cartridge.

I do have the HesMon cartridge but I believe it only supports the
unexpanded memory, the ML cartridge you mention does it support expanded
Memory?

Terry Raymond

On Jul 18, 2017 12:11 PM, "Jim Brain" <brain@jbrain.com> wrote:

> On 7/18/2017 2:37 AM, Mia Magnusson wrote:
>
>> Hi
>>
>> I'm thinking about making a home made multi cartridge for VIC 20. (Yes,
>> I know that there are quite a few already but making the hardware is a
>> hobby for me).
>>
> As Marko Makela notes, Ultimem sounds a lot like your idea.  The project
> is open source (I should ensure all the files are online), so you are free
> to use it to create your design, or you can grab one, and rewrite the HDL
> to suit your needs.  It uses a xc95144xl, 1MiB SRAM, and 8MiB FLASH ROM.
>
> I'm thinking about a design whith four software writable registers for
>> freely selecting rom images for 6000, 7000, A000, B000 and some
>>
> I chose 8kB boundaries, and used a single register for RAM1/2/3 and IO2/IO3
>
>> Or should I go all the way with registers for each 4k block
>> 2/3/4/5/6/7/A/B000 and for each 1k I/O block?
>>
> I found that creating that much granularity for the 1kB chunks was of
> little use.
>
>>
>> Combined with on/off for ROM and RAM for each 4k block would probably
>> make it possible to have any desireable configuration.
>>
> I have the following options:
>
> OFF
> RAM R/W
> ROM R/W
> RAM R/O
>
>> Or am I just feature creeping it so it might never be buildt?
>>
> Well, I can attest at least one person built a similar unit.
>
> Jim
>
>
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>


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