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TheHeadFL · 01-19-2006, 10:25 PM

OK that is most likely what is called a "PLA" (Programmable Logic Array) which you need to buy specifically, and you also need a machine that would allow you to 'burn' it.

You would probably be able to simulate this kind of design in a program like Logic Works (google this) and play with it. Depending on how low level you want to get, you can write it in a synthesis language like Verilog (some programs can burn verilog to prototyping chips) or you can actually work out the logic at the gate/mux level itself.

I would guess that if you had a PLA to store the writing to display (7 x 30 or whatever it specified) and then a multiplexer and a clock to select the appropriate line from the PLA to activate the LEDs which would be switched by AND gates connected to the outputs of the multiplexer and PLA.

01-19-2006, 10:25 PM	#10 (permalink)
TheHeadFL Ultra Techie Join Date: Jul 2005 Posts: 530	OK that is most likely what is called a "PLA" (Programmable Logic Array) which you need to buy specifically, and you also need a machine that would allow you to 'burn' it. You would probably be able to simulate this kind of design in a program like Logic Works (google this) and play with it. Depending on how low level you want to get, you can write it in a synthesis language like Verilog (some programs can burn verilog to prototyping chips) or you can actually work out the logic at the gate/mux level itself. I would guess that if you had a PLA to store the writing to display (7 x 30 or whatever it specified) and then a multiplexer and a clock to select the appropriate line from the PLA to activate the LEDs which would be switched by AND gates connected to the outputs of the multiplexer and PLA. __________________ Desktop machine: 2 x Opteron 246, Asus K8N-DL, 2GB PC3200 ECC Reg., XFX GeForce 6600GT, 74gb WD Raptor, 2 x 19\" LCDs, Windows XP x64 Server machine: Intel P4 3.0GHz 2MB EM64T, ECS i865pe, 1GB PC3200, 36gb WD Raptor, Windows Server 2003 Laptop: Dell Inspiron 9100 (Intel P4 3.2GHz 1MB Prescott, i865pe, 512MB PC3200, Mobility Radeon 9700, DVD+R/DL Burner), Windows XP Linux: P3 450Mhz, 386MB ram, Slackware 10.1 (Running mySQL/Apache)