RCA RMB-167 - Manual (Page 19)

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6 GAL EQUATIONS
Two PALCE16V8 are used. The first (U1) is responsible for the reset logic and auxiliary options,
and the second (U2), for the memory decode logic. Refer to the circuit diagrams for more
information.
6.1 Default GAL Equations
6.1.1 U1 Equations
;U1 Bootstrap Loader Logic
;----------------- PIN Declarations ---------------
; --- inputs ---
PIN 1 A18
COMBINATORIAL ;
PIN 2 A19 COMBINATORIAL ;
PIN 3 A20 COMBINATORIAL ;
PIN 4 A21 COMBINATORIAL ;
PIN 5 A22 COMBINATORIAL ;
PIN 6 A23 COMBINATORIAL ;
PIN 7 RSTIN_ COMBINATORIAL ;
PIN 8 RSTOUT_ COMBINATORIAL ;
PIN 9 CFG0 COMBINATORIAL ;
PIN 11 CFG1 COMBINATORIAL ;
; --- outputs ---
PIN 12 HISEG
COMBINATORIAL ;
PIN 13 RSTCYC COMBINATORIAL ;
PIN 14 RSTCYC_ COMBINATORIAL ;
PIN 15 AUX0 COMBINATORIAL ;
PIN 16 AUX1 COMBINATORIAL ;
PIN 17 DUMMY COMBINATORIAL ;
PIN 18 LEDRST_ COMBINATORIAL ;
PIN 19 LEDAUX_ COMBINATORIAL ;
;----------------- Boolean Equation Segment ------
EQUATIONS
RSTCYC = /( RSTIN_ * RSTCYC_ )
RSTCYC_ = /( /RSTOUT_ * RSTCYC )
HISEG = A18 * A19 * A20 * A21 * A22 * A23
AUX0 = 1
AUX1 = 1
DUMMY = 1
LEDRST_ = RSTCYC
LEDAUX_ = RSTCYC_