[Coco] Gal Logic

[jdaggett at gate.net]

Eric

Hope this helps

james

CHIP FlipFlop PAL16RP8
  
CLK J K T PR CLR D S R GND
/OC /SRC /SRT /DC /DT /TC /TT /JKC /JKT VCC
  
EQUATIONS
  
JKT :=  J*/JKT*/CLR                     ;JK Flio-Flop
     + /K* JKT*/CLR                     ;(JKC = /Q)
     +  PR                              ;Preset Q
  
JKC := /J* K  */PR                      ;JK Flip-Flop
     + /J*/JKT*/PR                      ;(JK = /Q)
     +  K* JKT*/PR
     +  CLR                             ;Clear /Q
  
TT  :=  T*/TT*/CLR                      ;T Flip-Flop
     + /T* TT*/CLR                      ;(TT = Q)
     +  PR                              ;Preset Q
  
TC  := /T*/TT*/CLR                      ;T Flip-Flop
     +  T* TT*/PR                       ;(TC = /Q)
     +  CLR                             ;Clear /Q
  
DT  :=  D*/CLR                          ;D Flip-Flop
     +  PR                              ;Preset Q
  
DC  := /D*/PR                           ;D Flip-Flop
     +  CLR                             ;Clear /Q
  
SRT :=  S*     /CLR                     ;Set-Reset Flip-Flop
     + /R* SRT*/CLR                     ;(SRT = Q)
     +  PR                              ;Preset Q
  
SRC := /S* R  */PR                      ;Set-Reset Flip-Flop
     + /S*/SRT*/PR                      ;(SRC = /Q)
     +  CLR                             ;Clear /Q



On 29 Jan 2004 at 11:55, peak at mail.polarcomm.com wrote:

Date sent:      	Thu, 29 Jan 2004 11:55:39 -0600
From:           	peak at mail.polarcomm.com
To:             	coco at maltedmedia.com
Subject:        	[Coco] Gal Logic
Send reply to:  	CoCoList for Color Computer Enthusiasts 
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> Does anyone know how to program a coco type clock generator 
> into a GAL chip? I understand combinational logic fairly 
> well, and am able to use "boolean" logic equations. My 
> understanding of "clocked" OR "Registered" logic is a bit 
> rusty.
> What I want do do is build a dual J-K flip flop E and Q clock 
> generator in a GAL device not in TTL!
> Also is there a library somewhere of equations for flipflops 
> etc?
> Eric
> KB0LXY
> 
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