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68B09 CPU
A Motorola or second source compatible 6809 CPU (this is not to be confused with the 6809E or EP )
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SIP-9 (BUS Type) 10k Resistor networks
these tie each 10k path through pin 1
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10k Resistor
5% or better 1/4 or 1/2 Watt Footprint uses 1/2 watt but they are not required
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1k Resistor
5% or better, 1 is for optional power module mod, 2 for the optional serial card and may be omitted (1/2 or 1/4 Watt)
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SN74HCT00N
Logic ICs / Gates and Inverters
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SN74HCT138N
Logic ICs / Decoders, Encoders, Multiplexers, Demultiplexers
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1 |
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Tactile Push button
A 6x6 will fit, but you may have to splay the legs out a bit.
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1 |
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Latching DPDT switch
a 7x7 will fit, but you may have to splay the legs out a bit.
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1 |
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DC005 5.5x2.1mm Barrel Jack
Standard layout barrel jack, whatever fits your supply
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1 |
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LED 5mm
The Drop resistor is 1K which may need to be ajusted depending on your part but should be good enough for most standard 5mm leds
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Sockets
Various sizes -- The EPROM Silkscreen and bypass cap are positioned for even a large ZIF socket if desired
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1 |
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Buck Converter Module
LM2596 DC to DC Converter module, optional if you intend to build your own power supply.
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2.54mm 2x20 40-Pin Female Pin Header
Expansion slot connector
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2.54mm 2x20 40-Pin Male Right Angle Header
For the Serial expansion card (if desired)
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1 |
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68B50 (6850 ACIA) Sierial Chip (highest speed grade)
For the Serial Expansion card (if desired)
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100pF bypass capacitors
Regular Ceramic Disk is fine
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4.7 uF Capacitor
I used an electrolytic, a tantalum or ceramic would be better.
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47 uF Electrolytic capacitors
These are source caps for the card edge connectors. 10 or 25v fit well in this footprint.
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1 |
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1N4148 Diode
Silicon Switching diode
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1 |
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HB6809 PCB
Main PCB
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1 |
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HB6809 Minimal ACIA Serial Module PCB
optional, but required for serial output and highly recommended
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1 |
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62256 compatible SRAM
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27128 compatible EEPROM / EPROM
You can use my instructions found on the Hack a day Page to use a compatible 32k ROM as well.
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1 |
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7.3728 Mhz Crystal
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2 |
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22pf Ceramic disk capacitors
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1 |
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8 position dip switch
ACIA Adapter needs a dip switch block for picking which interrupt line to route the signal down.
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