[Coco] Sneak peek

[Roger Taylor]

At 04:51 PM 2/14/2009, you wrote:
>Roger,
>
>Didn't mean to hit a nerve. You did ask the public to design and 
>build a while back and had some offers.
>That is all.
>No need to over explain.......
>:) Back at ya!
>Regards,
>Mark


It didn't quite work that way, though.  :)



Btw, getting back to quality chit-chat here... :)  while it's on my 
mind, I'm looking at that 6551 replacement chip I mentioned a few 
weeks ago here and was wondering if it has improvements over the 
Rockwell 6551 that you are aware of.  I've got 2 of these now that 
I'm about to try in my pak but just typing back and forth won't prove 
much.  If by chance it has a bigger FIFO it would be nice but the 
price of these chips I think is over twice the cost of the Rockwell 
chips I've obtained.  I'm trying to keep the pak cost as low as 
possible but then everything is socketed, so anyone would have the 
option of customizing the boogers to their liking, even preset 
jumpers for 6551 tastes.

here's the 6551 replacment chip page
http://www.westerndesigncenter.com/wdc/w65c51s-chip.cfm

Features of the W65C51S
    * Full duplex operation with buffered receiver and transmitter
    * Data set/modem control functions
    * Internal baud rate generator with 15 programmable baud rates 
(50 to 19,200)
    * Program selectable internally or externally controlled receiver rate
    * Programmable word lengths, number of stop bits and parity bit 
generation and detection
    * Programmable interrupt control
    * Program reset
    * Program selectable serial echo mode
    * 2 Chip Selects
    * 14 MHz Operating Bus Speed
    * 5V Power Supply
    * Full TTL compatibility
    * Bus compatible with 14 MHz W65C02S and W65C816S
    * Bus Compatible with 65xx and 68xx microprocessors
    * Replacement for CMD / GTE Harris / MOS Technology / GE / RCA / 
Synertek / Motorola / Freescale / Rockwell R6551, 65SC51, 65C51, 
6551, CPD65C51, 6551, 6850

-- 
Roger Taylor

http://www.wordofthedayonline.com