Re: Apple II 4k Memory Select Jumper Blocks for MB Rev. 0

["spacealbum" <dbackenkoehler@t-online.de>]

Linards Ticmanis schrieb:

> spacealbum wrote:
> > Does anybody know how the 4k Memory Select Jumper Bocks look like (if I
> > am not mistaken only the Rev. 0 motherboard had the possibility to
> > change various jumper block tytes. The later Rev. 1 boards had 4
> > 16/16/16 blocks soldered to the board).
>
> Are you sure? I thought their removal came only with the II+ in 1979,
> and the switch to Rev. 1 was before that?
>
> --
> Linards Ticmanis

Rev. 0 820-0001-00 has three sockets to plup in the memory select
jumpers,
Rev. 1 820-0001-02 to 04 have three 16/16/16 jumpers soldered to the
board which can't be changed
Rev. 7 820-0001-07 and RFI have no jumpers at all

The earliest IIplus I have seen so far had a 820-0001-03 main board ->
is there anybody out there with an early Sn. IIplus with an earlier
board??

The earlies europlus I have seen so far had a 820-0001-07 main board
which is the first board that had the two solderpoints to allow the
video signals to reach slot 7 (to my knowledge)