PAL16R8
ADGD 13/8/86
44902A,6F,RAMC (RAM CONTROL)

OSC /RGNT /CGNT /BGNT /BDAP50 /MR /BGNT25 /CGNT25 /BDRY50 GND
/OE /HIEN /LOEN CAS RAS /QD /QC /QB /QA VCC

                                ; 0)1110 IDLE UNIT NEXT GNT OF ANY TYPE
QA := /QD * /QC * /QB *  QA     ; 1)1010
    + /QD * /QC * /QB * /QA
    +  QD * /QC *  QB *  QA     ; 2)1011 PAUSE UNTIL BDAP OCCURS (ONLY ON
    +  QD * /QC *  QB * /QA
                                ; NO WAIT STATE ON CPU TO MEMORY WRITE

QB := QC * QB * QD                          ; 3) 1001
    + QC * QB * /QD
    + QC * /QB * QD
    + QC * /QB * /QD
    + QB * /QA * QC                         ; 4) 1000
    + QB * /QA * /QC
    + /QD * QA                              ; 5) 0000
    + QB * BGNT25 * /BDAP50 * /MR * /BDRY50 ; 6) 0001
                                            ; 7) 0011
QC := /QD * QC * QB                         ; 8) 0010
    + /QD * QC * /QB
    + QC * /QB * QA                         ; OTHER STATES WILL GO TO IDLE AFTER 1
    + QC * /QB * /QA
    + QC * QA * QD
    + QC * QA * /QD
    + /QD * QB * /QA 
    + QC * /RGNT * /CGNT25 * /BGNT25

QD := QC * QD * QB
    + QC * /QD * QB
    + QC * QD * /QB
    + QC * /QD * /QB
    + QB * /QA * QC
    + QB * /QA * /QC
    + QD * QA * QB
    + QD * QA * /QB

/RAS := QC * QA * QB                        ; RAS=1,2,3,4,5,6
      + QC * /QA * QB
      + QC * QA * /QB
      + QC * /QA * /QB
      + /QD * QA * QD
      + /QD * QA * /QD
      + /QD * QB * QC
      + /QD * QB * /QC

LOEN := /QC * /QB * /QA * QD                ; LOEN=3,4,5,6
      + /QC * /QB * /QA * /QD
      + QD * /QC * QA * QB
      + QD * /QC * QA * /QB

HIEN := QD * QB * /QA * QC                  ; HIEN=0,1,2,8
      + QD * QB * /QA * /QC
      + /QD * /QC * QB * QA
      + /QD * /QC * QB * /QA

/CAS := QB * /QA * /RGNT                    ; CAS=4,5,6,7,8
      + QD * QB * /RGNT                     ; CAS ON REFRESH=1,2,3,4,5
      + QC * /QB * QA
      + QC * /QB * /QA
      + QC * QA * QD
      + QC * QA * /QD
      + /QD * RGNT

DESCRIPTION

; 190387 JLB: RAS & CAS INVERTED.
; 190387 JLB: BGNT25 NEW INPUT. USED TO DELAY STATE MACHINE TURN ON 25NS ON
; BUS CYCLES.
; 230387 CJTC: CGNT25 NEW INPUT. USED TO DELAY STATE MACHINE TURN ON 25NS ON
; CPU CYCLES.
; 020487 JLB: BDRY50 WILL GET US OUT OF THE WAIT STATE ON TIMEOUT.
; 180587 M3202B
; 060887 JLB: MAXIMIZE EQUATIONS WITH INTERNAL FEEDBACK TO MATCH CLOCK SKEW.