Re: [stella] FE, 3F, Bankswitching, and Data lines

Subject: Re: [stella] FE, 3F, Bankswitching, and Data lines
From: mickey_m@xxxxxxxxx
Date: Wed, 18 Dec 2002 12:11:20 +0000
To late now, already done.  I dont know Verilog or VHDL, I liked using Xilix's 
schematics editor, all I had to do was draw my circuit and its done.  Sure the 
simple bankswitching could just be done with basic logic chip at RadioShack 
but, I wanted to support all bank switching types.  I am up to the XC95144, 
which has a ton of gates, but not all are dedicated to bank switching.  I also 
want to work in Pitfall II and Starpath, maybe someday.

> I don't think you really need a full blown FPGA like the mentioned Xilinx
> XC9500 to do bank-switch emulation in hardware. Some of the simple schemes
> (F6, F8, FA) can easily be implemented using a cheap Programmable Gate Array
> like a PAL20V16. I haven't tried though, but you can try yourself. Get
> yourself some VHDL compiler and select a PAL20V16 or GAL20V16 as target
> architecture and check if your code can be synthesized in one of these.
> Shouldn't be too hard.
> With kind regards,
> Matthias
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