Re: Apple ][+ gravely ill - seeking assistance :(

["N.N. Thayer" <nnthayer@hotmail.com>]

On Jun 1, 9:19 am, "N.N. Thayer" <nntha...@hotmail.com> wrote:
> On Jun 1, 8:53 am, schmidtd <schmi...@my-deja.com> wrote:
>
> > On Jun 1, 9:22 am, "N.N. Thayer" <nntha...@hotmail.com> wrote:> Hmmm.  Well, now I can get to a prompt and work there indefinitely,
> > > but if I try to load anything off a disk, including ones that I know
> > > are self-bootable, I get garbage characters and the drive simply
> > > spins.
>
> > > I've swapped disk controller cards, and tested the drives on another
> > > machine, so I know it's not either of those.
>
> > Have you swapped power supplies?  Failures might be occurring because
> > voltages drop too low to sustain life while the drive draws its power
> > to spin up...
>
> I've got another power supply coming in the mail, a //e model.

Hmm!  Further testing:

1. Swapping power supplies has no effect.

2. If I boot a known good disk with a full onboard bank of RAM, I get
garbage and a constantly spinning drive.

3. If I do the same after having removed RAM E3 through E10, I get a
beep and it drops me into the monitor.  The drive spins down.

4. If I replace E3 through E10 with RAM retrieved from a known working
Language Card, and boot the disk, I get the same result as in #3.