[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Problems transferring DOS3.3 from PC to IIe :(



As it turns out, I think I did some bad stuff to the machine last night.  After
writing the post to usenet last night, I decided to give a shot to different
combinations of cards and at times I inserted cards while the machine was on -
then there was the smell of electronics burning.  The next time I had the thing
on, my display was split into four mini-sections of a screen filled with
characters and the drives did not spin.  I believe I did something to the a ROM
chip.  

I had plans anyway to get another machine for parts...

Any further help would be so appreciated.

Ignoring that for the time being, here are some comments...

Rubywand wrote -
>     Having a bad or missing RAM IC in the last row of 16K RAM chips (the row
>closest to the Slots) might result in the last 16K being ignored-- not sure
>about that. Just a minute ...  Okay; when (with power OFF) I pull out the
>Language Card (which also removes the left-most RAM IC on the last row) and
>turn ON the computer (no boot) and do a PRINT FRE(0), the result is 30717.

That's my number 30717.

>
>     As mentioned earlier, the LC uses an IC-type plug that needs to go into
>the left-most RAM socket in the last row.
>
>Note: The IC-type plug goes in with the cable side-- the side of the plug
>where the cable goes into the plug-- facing toward the middle of the
>motherboard. From the front of the computer, it looks something like this
>

<snip snip snip>

>
>     Since installing the LC requires pulling out the RAM chip in the
>left-most socket, a replacement RAM chip for the socket is included on the
>Language Card (which is why it has 9 RAM chips.)

The card does not have any evidence of a cable or anything missing.  I'm not
sure what the RAM chips would look like but there are not 9 of any single kind
of chip.  There are 8 NEC 8329DD192's.  This is the one board that I found that
I am not 100% positive that it can be used for a Plus and i really doesn't have
any ID of any kind on it.

>
>     The LC also substitutes its ROM for the F8 ROM on the motherboard. The
>new ROM is the "AutoStart ROM" (the one included on later model ][+'s). If
>your ][+ already has the AutoStart ROM on the motherboard, you will not
>notice any difference in operation.
>
>

I am pretty sure it has an AutoStart already.  It goes right to spinning a disk
and you need to hit Reset to get to BASIC.

>
>> 
>> For reference here are my cards, top down -
>> slot 6 - Apple disc II interface with 2 drives
>
>     Forgot to mention-- this interface must have the ROMs to support
>16-sector disks in order to use DOS 3.3 and in order to use the LC. (A
>standard LC kit included the two new ROMs for the Disk Controller card.) 
>
>     According to the Language Card manual, the two new ROMs for 16-sector
>operation are labeled ...
>
>P5A and/or 341-0027-xx
>P6A and/or 341-0028-xx

These two IC's are on the Apple card - the other card doesn't even have sockets
but IC's right on the board.


>> 2)  The RAM section on the motherboard is full, should I therefore have 48K
>> already?
>
>     As long as _all_ of the sockets (all 24) are filled, yes.
>

Yes, I have 24.  The leftmost one is seated in a higher white socket.

>
>Rubywand

Rubywand, once again thanks.  This has been much appreciated.