Anstož for the  building in was the  wish after a additional(ly) serial
interface to my Mega ST. With it should the  MIDI -ACIA not become rebuilt.
I endschied me for the  most simple path and constructs a second MFP
a, there for it already a model available was (ATARI TT). As well can one it
Huckepack to the  already Existing aufl”ten. As Abfall place a still the  8
I/O-headings and the  Timer to the provision.
The  Adressdekodierung can natural(ly) too to other type and way result.
The  Signal /dev stands to the  GLUE pin 25 to the provision. By the building in is first
pin 34 (/IEI) on the ST-MFP to interrupt. In the  Daisy chain of the  MFP-Interrupt
lies the  new MFP in the  priority before the  old 68901, just as as in the TT.
Then will(_be) the  new 68901 to the  old aufgel”tet. It become following pin
soldered :
 1 R/W
 2 A1
 3 A2
 4 A3
 5 A4
 6 A5
 11 Vcc
 21 /reset
 32 /irq
 35 clk
 36 GND
 37 D0
 38 D1
 39 D2
 40 D3
 41 D4
 42 D5
 43 D6
 44 D7
 45 /iack
 46 /dtack
 47 /ds

All other pin have to before(hand) become hochgebogen. There the  second serial
interface only the  Xon/Xoff-protocol beherrschen should comes one with in each case
a Leitungstreiber for in-&  exit from. For the  Ausgangstreiber can
one the  ungenutzten Existingse use. For the  entrance can one a 1489
building in, simple(r) goes with a link-up with a Transistor, what for
the  wanted purpose sufficient.
The  software instals\ed the  interface in the operating system. From there should it
in the AUTO folder lie, can however too additional become started. There it in
the  Bconmap-structure included will(_be) runs it first from TOS 2.06. Tested
became it in the ROM-TOS and in the TOS as\than RAM-version.
Use can one the  interface z.B under MiNT i.e.. MultiTOS . You will(_be) as\than
U:\dev\modem2 steered. Has one a Terminal associated can one through
input of mintshel > u:\dev\modem2 < u:\dev\modem2 the  A/output of the Shell
to the  Terminal umleiten.
There RUFUS the  interfaces direct(ly) speaks to gives it unfortunately difficulties, there
orginalerweise the  interface with the  Bconmap-number7 in the SCC lies, from there
natural(ly) bombs. I hold it anyway not for favourable,that  Hardware direct(ly)
through the  program  to control, for it is the  operating system appropriate. From there
should one the  admittedly faulty routines in the TOS through Patches
correct and the  interfaces over the  GEMDOS -functions make for.
Vieleicht gives it too time(s) a RUFUS -version, what the  existence of the
interfaces self tests and (self) corresponding(ly) curbs. Over a such
version would I me please, it can to following address become sent:

On Saischowa
Hutungstraže 4
03044 Cottbus

P.S. By the Orginalnachbau please the  Selektleine $FFFFFAC0 not for other
additional(ly) Hardware use, on it depends on my Transputerlink. In the case that interest
to the  hardware-wise implementation deselben can one (to) me yes time(s) write.
The  driver is compatible to the  c`t -publication to the ALIA-Link. I
am too always to Transputersoftware interests\ed.|
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This  word-by-word   exchange   from  a   German   document, with   some
adjustments  for  German idiom,  was  made with  a  registered  version 
of Ruftrade2.                                                           
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