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1983: Motorola
  week 04, 1983: Motorola MC6809EP
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Motorola MC6809EP
Motorola MC6809EP Top Side
Motorola MC6809EP Back Side
6809 KOREA
Comment by Joe F (coffee6809[at]
Also Used in the Tandy/Radio Shack color computer
Comment by Paul Harrison (peharri[at]
The 6809 wasn't based upon the 6800 it was a from-the-ground-up new design. The key features were a variety of addressing modes two seperate index registers and two seperate stack pointers. I`m not aware of any built-in memory. The addressing modes which included relative addressing for pretty much every situation you`d need addressing made programming for the 6809 extremely elegant. You could write position independent code with ease. While other chips already had the market by the time the `09 came out it grew a sizable fan base that resulted in operating systems like OS-9 being developed for it.
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Core Frequency:1 MHz
Board Frequency:1 MHz
Data bus (ext.):8 Bit
Address bus:8 Bit
Voltage:5 V
Manufactured:week 04/1983
Made in:Korea
Package Type:Plastik
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