RCA RMB-167 - Manual (Page 20)

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6.1.2 U2 Equations
; U2 Memory Decode Logic
;----------------- PIN Declarations ---------------
; --- inputs ---
PIN 1 A0
COMBINATORIAL ;
PIN 2 A14 COMBINATORIAL ;
PIN 3 A15
COMBINATORIAL ;
PIN 4 A16 COMBINATORIAL ;
PIN 5 A17 COMBINATORIAL ;
PIN 6 BHE_ COMBINATORIAL ;
PIN 7 MON COMBINATORIAL ;
PIN 8 HISEG COMBINATORIAL ;
PIN 9 RESET COMBINATORIAL ;
PIN 11 AUX0 COMBINATORIAL ;
PIN 19 AUX1 COMBINATORIAL ;
; --- outputs ---
PIN 12 RAMSELL_
COMBINATORIAL ;
PIN 13 RAMSELH_ COMBINATORIAL ;
PIN 14 ROMSEL_ COMBINATORIAL ;
PIN 15 MA14 COMBINATORIAL ;
PIN 16 MA15 COMBINATORIAL ;
PIN 17 MA16 COMBINATORIAL ;
PIN 18 MA17 COMBINATORIAL ;
;----------------- Boolean Equation Segment ------
EQUATIONS
RAMSELL_ = A0
RAMSELH_ = BHE_
ROMSEL_ = 1
MA14 = A14
MA15 = A15
MA16 = 0
MA17 = 0
6.2 Alternate GAL Equations
6.2.1 U1 Equations For EPROM In Low Memory
;PALASM Design Description
; EPROM/RAM selected by CFG0 and CFG1
;
;
; jumper at low 32K high 32K
; ----------- ------- --------
; NONE RAM RAM
; CFG0 EPROM RAM
; CFG1 RAM EPROM
;CFG0 and CFG1 EPROM EPROM
; --- Declaration Segment ----------------------------
TITLE RMB-167 Memory Decode Logic -- RAM/EPROM
PATTERN
REVISION
AUTHOR