KBCZ-VSP1
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KBCZ-VSP1 Schematic

The KBCZ-VSP1 is a VipStick Monitor and debugging tool.  The primary purpose of the board was to prove the Vipstick concept and design.  It exercises the Vipstick circuit and shows the the hardware works as designed.  But, it is also a very valuable tool in it's own right.

 It was designed to facilitate the development of the VipStick specification and hardware design.  Included is the VipStick common Address Match Logic and Signal Connection Logic as well as displays useful in debugging VipStick designs.

Look at the Schematic.

The Address lines PAD0 - PAD2 are fed into a 74LS247 BCD - 7 segment decoder which connects through a 330 ohm resistor pack to a common anode display.  This will display the address on the bus.  The PSEL signal is fed through a resistor into the decimal point pin of the display. 

LEDs on board indicate the status of the switched signals.

The 7 segment display shows the status of the address lines.  The PSEL line is shown on the decimal point.  The other signals are displayed on the LEDs only when the address match is made with the address set on the dip switch of the board and the PSEL is true.

Here is the board in the DT001 programmer along with the DT101 and the KBCZ-203.  And, the back side of the board.

The Vipstick circuit works to address 8 serial peripherals on the SimmStick bus using just 9 lines.  And, 8 of these lines may be used for other purposes as long as PSEL is is left low.  Below is a schematic that shows the wiring.

Note that for other Vipstick boards, only the Dip switch, 74LS85 and 4066 are required.  Be sure to read the Introduction.