An implementation of the 74F269 bidirectional counter (datasheet) on a 22V10 GAL.
counter.pld is the original .pld file. You can use WinCUPL from Microchip to compile it to a JEDEC (.jed) file.
COUNTER.jed is the JEDEC file that a chip programmer reads to program the chip. It can be programmed to an ATF22V10 chip, or a Lattice 22V10 GAL.
COUNTER.txt contains the expanded, minimized logic equations, and the pinout.
This is the pinout, which DOES NOT MATCH the 74F269 due to limitations in the GAL.
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| Counter |
CLK x---|1 24|---x Vcc
D0 x---|2 23|---x Q2
D1 x---|3 22|---x Q3
D2 x---|4 21|---x Q4
D3 x---|5 20|---x Q5
D4 x---|6 19|---x Q6
D5 x---|7 18|---x Q7
D6 x---|8 17|---x Q1
D7 x---|9 16|---x Q0
!CEP x---|10 15|---x !TC
!CET x---|11 14|---x UP
GND x---|12 13|---x !PE
|______________|
