Jump to content

  2. View New Content
  3.  
  2. → Viewing Profile: Posts: mega-hz


mega-hz's Photo

  • Overview
  • Profile Feed
  • Likes
  • Friends
  • Topics
  • Recent Activity
  • Gallery
  • Blog
  • Issues
  • Stats

mega-hz

Member Since 10 Sep 2007
OFFLINE Last Active Mar 25 2012 8:34 AM

Posts I've Made

In Topic: SIO2SD v.3 Questions

Wed Mar 21, 2012 4:57 PM

no, i meant DATA-IN on ATARI Side!

In Topic: SIO2SD v.3 Questions

Sat Mar 17, 2012 11:08 AM

Hi,
the 4k7 resistor shapes the weak signal to better ttl-levels, on sio-highspeeds it is very recommend!
Because the SD-Cards are mostly 3.3V types there must be a level-conversation from TTL (5V) to 3.3V.
That is what the 74LVC125 does!
The earlier used 74HC245 runs the sd-card with overvoltage, about 4.2V instead of 3.3V.
deeply measurements brought me to that result, to use a level-shifter and make the sio2sd a little bit better :-)

regards,
Wolfram

In Topic: SIO2SD3 PCB released

Mon Sep 19, 2011 6:38 PM

Please notice: only orders to my email adress with "SIO2SD3" can be accepted!

mega-hz(at)t-online.de

Thanks,
Wolfram

In Topic: SIO2SD3 PCB released

Wed Sep 14, 2011 1:47 PM

View PostPhilsan, on Wed Sep 14, 2011 1:21 PM, said:

View PostAtariGeezer, on Wed Sep 14, 2011 1:06 PM, said:

Can the firmware be upgraded to disable the high speed SIO so that v3.x firmware works on an 800 ?

Thanks,
Jay
I am not a SIO2SD expert but two v3.x firmware loader versions exist, normal and turbo.

No problem, the sio2sd3 can not ONLY the sio high speed!
Of course it can make the 1050 speed too!
So no roblem with 400/800 or XLOS!

In Topic: SIO2SD3 PCB released

Wed Sep 14, 2011 12:49 PM

.

  1. AtariAge Forums
  2. → Viewing Profile: Posts: mega-hz
  3. Guidelines