Re: Turbo232 UART Cart HDL

From: Jim Brain <>
Date: Tue, 10 Dec 2013 02:20:19 -0600
Message-ID: <>
On 12/10/2013 1:40 AM, Baltissen, GJPAA (Ruud) wrote:
> I don't have any datasheets of the 6551 at hand right now but isn't the 16450/16550 able to archive higher speeds?  With a CPLD you can now easily generate the Intel signals needed for this IC.
Yes, but all of the SW out there for uart carts is designed to use the 
6551 (well, there might be some SW for the ide64 shortbus uart 
expansion, but I've not heard of many apps for it).  I suppose one could 
emulate the 6551 registers and convert them to a 16550, but the T232 can 
do 230400 bps, so speed is not an issue (FIFOs are a value add for the 
16550 and higher ICs, though).

I appreciate the "clean sheet" approach to hardware design, but my 
philosophy trends to the "make it compatible" side.


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Received on 2013-12-10 09:00:06

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