City #27 09 сентября 1999

Железо

Iron - CONTROLLER IBM-compatible keyboard and mouse for each computer type ZX-SPECTRUM (How to work and connect V 2.0).

   PLANET SHELEZYAKA ********* ***********



                  CONTROLLER

   IBM-compatible keyboard and mouse for each

       computer type ZX-SPECTRUM

   How to work and connect V 2.0


(C) Company SCORPION 'SCORPION CLUB


                   continued


   To connect the controller to the board SCORPION ZS
 should:
- Connect one to one "system connectors H3/H4
Controller Boards SCORPIONa (Table 1), given
that for the convenience of plugging in the controller slot
constructively deployed in its own plane by 180 °
compared with the connector SCORPIONa, that is, if
board computer and controller card to put on
table details the up and rotate so that the system board 
connectors looked at each other, then the top and bottom 
connectors match friend, and the numbering is the opposite. X3 
- contacts with side parts (top). X4 - contacts from the

assembly (bottom).

   When you connect the controller using a flat
cable, its length should not exceed 50mm. Better
to use the extender system connector,
produced by us and allow to connect to the system connector of 
up to 3 peripherals at the same time, in other words, it is 
slots. - Connect a separate trail connector X5 controller 
connector periphery ZS in accordance with Table 4. - Keyboard 
and mouse are connected in accordance with Table 2-5.


   When connecting the controller to the other
Spectrum-compatible computers should be
perform some simple improvements that
relate signals IORQGE, WAIT, DOS /.

   The signals DOS / and IORQGE in SCORPION'e improvements
do not need, and the WAIT may have (if this
Revised on your board yet, check out !!!).

- Signal IORQGE. The output signal controller
necessary to block circulation to the ports
I / O located on the computer's motherboard.
To organize the input into the computer to:
remove the 20 foot Z80 from all other schemes and
solder in the gap resistance 470-620 ohms. After this
Revised IORQ-a 20-pin Z80, and the signal
IORQGE-end of the resistor, the opposite conclusions 20
processor.

- Signal DOS /. The input signal of the controller. Signal
used for internal decoding and excludes
conflict with the ports of TR-DOS signal DOS / must
show which of the system ROM is selected in this
time: DOS / = 1-TR-DOS; DOS / = 0 -ZX48/128.
In fact, this signal is the output "flip-flop
DOS "floppy drive controller, which must be
bring to the system connector. If, after
connection appeared on the screen ripples, it is better
just add locking containers for food on
computer's motherboard, or submit a +5 V supply and ground for
controller card is not from your computer, directly from
power supply.

- A signal WAIT. The output signal of the controller. If the
Your computer has circuits that produce
signal WAIT, then the decoupling of internal and external
signals need to: remove the 1924 withdrawal from the Z80
all other circuits than the system connector and
solder in the gap diode type KD522, plus
processor, and solder the resistor from 5 to 15 ohms
between 24 O Z80 and +5. (NOTE: IF THE
YOUR SCORPION'E NO MODIFICATIONS OF THIS, THEN READ
Below). Diode soldered to break the wires coming from the
O 19 additional chips TURBO,
installed in the mounting box, plus the 24 conclusion
Z80, minus a 19 IMS TURBO, as required
resistor. Check to be on your board
Scorpion ZS 256 TURBO - this revision is
done).


             to be continued ...