Switch settings: Facit 4070 tape punch

[Dennis Boone]

 > This is clearly not the same serial interface that i have in one of my
 > Facits. Mine has no switches (just soldered jumpers) and half the PCB
 > etch is text explaining how to set them (!).

 > Can you give the labels on the switches on your board? And what are the
 > main chips on it (is it a 1602/6402 type of UART, or a
 > microprocessor-based circuit, or what?)

Tony,

Here's a rough list of what's on the board:

Part no 1140 68 10-00

AY-5-1013 40 pin dip (cpu?)
MC14411P 24 pin dip (uart?)
1489 line driver
27 assorted 7400 series
Various discretes, including 17 large transistors/regulators
8 wire jumpers labelled 1-8
Wire jumper labelled ERR
Place for wire jumper labelled TL
Large chrome toggle switch labelled SER/PAR/SERIAL WITH ERROR CODE on
    card edge (missed the labeling on this earlier)
DB25 on card edge
8-switch dip pack labelled bit1-bit8 error code
4-switch dip pack unlabelled
5-switch dip pack labelled with baud rates 75-600
8-switch dip pack labelled as follows:
   1. PARITY
   2. 1STOP
   3. NB 2
   4. NB 1
   5. ODD CH
   6. BIT 8
   7.    / EVEN
      GEN
   8.    \ ODD

Chip dates are mostly 1978.

The toggle switch, error code and baud rate stuff is all obvious.  I can
figure out parity and 1stop by trial and error.  For the rest I could
use some clues.

Thanks,

De