RE: [uCsimm] Fried uCSimm?

From: Stu (
Date: Tue Feb 29 2000 - 00:01:43 EST

Type 'go'.

> -----Original Message-----
> From: []On
> Behalf Of Carl_Holmberg
> Sent: Monday, February 28, 2000 4:49 PM
> To:
> Subject: [uCsimm] Fried uCSimm?
> If I've damaged the uCsimm itself, what might some symtoms be?
> When I first assembled the ugardener board, I reversed the
> polarity of the pins on
> the R Shack adjustable wall wort and killed the voltage
> regulator. To up the ante, I
> repowered the board with the uCsimm on board, and got zippo over
> the tty and
> ethernet. Power in prototyping area at ~5v. Oops. Ordered three
> replacement
> regulators from Digikey and waited.
> Two months later (yesterday) put in a new regulator, switched the
> wall wort polarity
> to negative center pin, and took the unit for a spin. Power in
> prototyping area
> ~3.2v. Power down and attach uCsimm, tty, and ethernet. Power on,
> das blinkenlights
> (not steady) on enet hub, ~3.2v in prototyping (gotta get some
> clip on probes!) and
> life on the tty...
> uCbootstrap v1.0 (c) Copyright 1999 Rt-Control All Rights Reserved
> FLASH type 2249 [AM29LV160B]
> DP|004000 DP|006000 DP|008000 DP|010000 D-|020000 D-|030000
> D-|040000 D-|050000 D-|060000 D-|070000 D-|080000 D-|090000
> D-|0a0000 D-|0b0000 D-|0c0000 D-|0d0000 D-|0e0000 D-|0f0000
> D-|100000 D-|110000 D-|120000 D-|130000 D-|140000 D-|150000
> D-|160000 D-|170000 D-|180000 D-|190000 D-|1a0000 D-|1b0000
> D-|1c0000 D-|1d0000 D-|1e0000 D-|1f0000 D-|200000
> B$
> ...which repeats for as long as it's powered up. The regulator
> still gets warm, so I
> don't leave it on for more than a minute at a time. After a
> particular boot up
> attempt, it stopped at 'B$':
> B$ ((Stops at this point, so I hit <cr>))
> B$ g ((years of Macsbug lead me to try 'g'<cr>))
> g: command not found
> B$ ls ((I know the kernel can't be up yet, but what the hell))
> ls: command not found
> B$
> uCbootstrap v1.0 (c) Copyright 1999 Rt-Control All Rights Reserved
> ((yada, yada, back to that cycle again))
> Things I haven't yet done:
> 1) set my meter to measure min/max, is voltage dip causing
> repeated resets?
> 2) see if any solder flowed thru the gardener board and is
> shorting simm holder
> pins.
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