| From: | Colin Wenzel |
| Date: | 10 Apr 00 at 14:43:33 |
| Subject: | Re: Timing Problems on A1200 Rev 1D4, 2B MB's? |
On 10-Apr-00, Kevin Bewley wrote:
> Hi,
> I have a A1200 Motherboard Rev. 1D4. I read in an Eyetech
> advert that I have 'timing' problems. Can anyone tell me what these
> timing problems relate to, I suspect the IDE interface. Also can
> anyone tell me if they know how to perform this 'upgrade'?
>
> Thank you,
> Kevin
>
================A1200 MODS===================
Rev.1D.4 Budgie Chip Rev -01 (only) Remove E123C & E125C from
underside A1200 Board (under Alice)
Rev.1D.4 Budgie Chip Rev -02 Rem E123C & E125C also Remove
XR358 470 ohm pull-up resistor.
Rev.1D.4 Budgie Chip Rev -02 also add 470 ohm pull-up
resistor to at pin 43 of U2 ALICE .
Rev .2B Budgie Chip Rev -01 & -02 Remove E123C & E125C
from underside A1200 Board (under Alice)
Rev .2B Budgie Chip Rev -01 & -02 Add 470 ~ 560 ohm pull-up
resistor at pin 43 U2 ALICE .
Rev .2B Budgie Chip Rev -01 & -02 change R118 from 470 ohm
to a lower value of 220 ohms.
-------------------------------------
Colin Wenzel. Australia.
EMAIL: mailto:colstv@hotkey.net.au
URL: http://www.hotkey.net.au/~colstv/
ICQ: 17608330
AMIGA: 4000T, 68060/50, 150Mb RAM,
OS 3.5, EGS Spectrum.
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