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Zombie Protocol

for the Tandy Color Computer

This is a attempt at a UDP debugging/monitor/startup code (in MC6809 assembler)

  • UDP/IP stack
  • DHCP client
  • DNS look ups
  • ARP for Ethernet
  • Zombie protocol for Color Computer
  • TCP (wip)

Requirements for building

  • lwtools - William Astle's assembler, etc. for the 6809
  • xxd - a binary dumper that produces .h file for the master
  • make - builds everything.
  • gcc - Gnu's Compiler
  • toolshed - (decb,makewav command) Color Computer toolkit

To build

$ make

out will pop:

  • zombie.dsk - A disk image containing a DECB loadable zombie client
  • zombie.bin - zombie client executable
  • master/zombie - a Linux master with CLI interface

To Run:

  1. setup tap interface (forward and NAT it)
  2. start lwwire a w/ packet interface b might as well have zombie.dsk presented
  3. run zombie master on a LAN connected computer
  4. run "zombie.bin" on your color computer.

After loading/exec'ing your zombie.bin will go TSR, mooching on the 60hz timer interrupt. It will listen on port UDP port 6999 for command packets from a master.

Doing something like this should be close:

# Set up tap interface
ip tuntap add dev tap0 mode tap
ip addr add 192.168.42.1/24 dev tap0
ip link set tap0 up
# Enable NAT and forwarding on the tap
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o wlp18s0b1 -j MASQUERADE
iptables -A FORWARD -i tap0 -o wlp18s0b1 -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i tap0 -o eth0 -j ACCEPT
# Run a dhcp server on the tap
dhcpd -f -cf zombie/dhcpd.test