Re: Identifying bad RAM on Amiga 1000 WCS board

2018-04-30 Thread Ethan Dicks via cctalk
On Mon, Apr 30, 2018 at 12:08 PM, Ethan Dicks wrote: > On Mon, Apr 30, 2018 at 11:24 AM, Peter Corlett via cctalk > wrote: >> On Mon, Apr 30, 2018 at 10:29:13AM -0400, Ethan Dicks via cctalk wrote: >>> [...] The exact value to write to which address is documented somewhere > >> As far as I ca

Re: Identifying bad RAM on Amiga 1000 WCS board

2018-04-30 Thread Ethan Dicks via cctalk
On Mon, Apr 30, 2018 at 11:24 AM, Peter Corlett via cctalk wrote: > On Mon, Apr 30, 2018 at 10:29:13AM -0400, Ethan Dicks via cctalk wrote: >> [...] The exact value to write to which address is documented somewhere but I >> haven't done any digging to find it. I've just been using the Fluke and >>

Re: Identifying bad RAM on Amiga 1000 WCS board

2018-04-30 Thread Peter Corlett via cctalk
On Mon, Apr 30, 2018 at 10:29:13AM -0400, Ethan Dicks via cctalk wrote: > [...] The exact value to write to which address is documented somewhere but I > haven't done any digging to find it. I've just been using the Fluke and > running the processor for a few seconds (UUT button) to let the ROMs do

Re: Identifying bad RAM on Amiga 1000 WCS board

2018-04-30 Thread Ethan Dicks via cctalk
On Mon, Apr 30, 2018 at 10:07 AM, Geoffrey Oltmans wrote: > On Sat, Apr 28, 2018 at 6:34 PM, Ethan Dicks via cctalk > wrote: >> >> Hi, All, >> >> I've been doing component-level diagnosis of a bad Amiga 1000 WCS >> board and since I was unable to find this information anywhere, I >> thought I'd p

Re: Identifying bad RAM on Amiga 1000 WCS board

2018-04-30 Thread Geoffrey Oltmans via cctalk
On Sat, Apr 28, 2018 at 6:34 PM, Ethan Dicks via cctalk < cctalk@classiccmp.org> wrote: > Hi, All, > > I've been doing component-level diagnosis of a bad Amiga 1000 WCS > board and since I was unable to find this information anywhere, I > thought I'd post it to the list so that it's in the hands o

Re: Identifying bad RAM on Amiga 1000 WCS board

2018-04-29 Thread Ethan Dicks via cctalk
On Sun, Apr 29, 2018 at 12:25 PM, Richard Sheppard via cctalk wrote: >> There are hand-drawn schematics floating around but they don't appear >> to match the production hardware > > There is a service manual - "Amiga Computer Model 1000 Preliminary Component > Level Repair PN 314038-02" which doe

Re: Identifying bad RAM on Amiga 1000 WCS board

2018-04-29 Thread Richard Sheppard via cctalk
> There are hand-drawn schematics floating around but they don't appear > to match the production hardware There is a service manual - "Amiga Computer Model 1000 Preliminary Component Level Repair PN 314038-02" which does show those PALs on page 1-25 "Amiga piggyback PCB assy #327139" Richard S

Identifying bad RAM on Amiga 1000 WCS board

2018-04-29 Thread Ethan Dicks via cctalk
Hi, All, I've been doing component-level diagnosis of a bad Amiga 1000 WCS board and since I was unable to find this information anywhere, I thought I'd post it to the list so that it's in the hands of more than one person. For an Amiga 1000 that starts up with a turquoise screen and never asks f