Re: Defective RAM on Apple IIgs

["Bryan Parkoff" <nospam@nospam.com>]

"William Garber" <willy46pa@garberstreet.com> wrote in message 
R92dnXZUZo4NwebYnZ2dnUVZ_vWtnZ2d@comcast.com">news:R92dnXZUZo4NwebYnZ2dnUVZ_vWtnZ2d@comcast.com...
>
> "Bryan Parkoff" <nospam@nospam.com> wrote in message 
> news:IQFeh.799$yC5.623@newssvr27.news.prodigy.net...
> : Folks,
> :
> :     I have experienced when I tried to copy files from DOS 3.3 to ProDOS
> : using Copy II Plus 9.1.  I compared both files on source and target.  I 
> have
> : discovered that both are not identical.  I did notice garbage data from
> : sector to sector.  I assure to be defective RAM built-in on motherboard 
> of
> : Apple IIgs (256KB).  I did diagnose using Ctrl-Open Apple-Closed
> : Apple-Reset, but it shows, "System Good".  It does not make sense.  It
> : should have scanned bank $0 through $3 to detect corrupted data in RAM.
> :     I have tested another Apple IIgs motherboard.  It is working fine 
> when
> : files are copied using Copy II Plus 9.1.  Maybe, I will need another
> : software to test defective RAM.  If it determines errors in RAM. there
> : should be a way to replace RAM chips on motherboard, but they are all
> : soldered.  Any suggestions?
> :
> : Bryan Parkoff
>
>
> Bryan,
>
> Some DOS files cannot be directly copied to ProDOS.
> There is a program on the ProDOS User's Disk that
> converts these files so that they can be copied,
> and it also copies the files for you. If I'm not
> mistaken, it is called Convert.

Bill,

    I am not sure what you are referring convert?  It is simple to copy some 
files from DOS 3.3 to ProDOS as convert.  It is an example of binary file 
and the length is 16,384 bytes.  It may be corrupted when copy is done.  Do 
you know if there is a special instruction how to avoid corrupted file?

Bryan Parkoff