44401B.txt

PAL16R4
JLB 12AUG86 BTIM.PAL
44401B,5D,BTIM

OSC /CC2 /CACT /CACT25 /BDRY50 /CGNT /CGNT50 /TERM /IORQ GND
/OE /EADR /EIOD /NC14 /Q2 /Q1 /Q0 /DAP /APR VCC

Q0 := CACT * /Q2 * /Q4 * /Q0 * /CACT25
    + /Q2 * /Q1 * QO
    + Q2 * Q1 * QO
    + Q2 * Q1 * /Q0

Q1 := /Q2 * Q0 * Q1
    + /Q2 * Q0 * /Q1
    + Q1 * /Q0 * Q2
    + Q1 * /Q0 * /Q2

Q2 := Q1 * /Q0 * Q2
    + Q1 * /Q0 * /Q2
    + Q2 * Q0 * Q1
    + Q2 * Q0 * /Q1

IF (VCC) APR = /Q2 * Q1 * CACT

IF (VCC) EADR = /Q2 * QO * CACT                    ; t + u
              + /Q2 * Q1 * CACT                    ; u + v
              + Q1 * /Q0 * CACT                    ; v + w
              + /Q2 * /Q1 * /Q0 * CACT * /CACT25   ; s
              + CGNT * /CGNT50                     ; address part for CPU cycle

IF (VCC) DAP = /Q2 * /Q1 * /Q0 * CACT * CACT25
             + DAP * /TERM * IORQ * CC2


IF (VCC) EIOD = IORQ * /Q2 * /Q1 * /QO * CACT * CACT2S * /BDRY50 * CC2
;STARTS WHEN THE s STATE HAS BEEN REACHED AFTER COMPLETING THE LOOP.

DESCRIPTION


;                        |<----------------------------------------------------|
;                                                                              |
;                ------<(s)000                                                 |
;               |     /                                                        |
; /CACT+CACT25  |    /   |                                                     |
;               |   /    |                                                     |
;                --/     |                                                     |
;                        |                                                     |
;                                                                              |
;                        (t)001                                                |
;                                                                              |
;                        |-----(u)-----(v)-----(w)-----(x)-----(y)-----(z)---->| 
;                             O11     010     110     111     101     100
                 
; 010387 JLB: EIOD TOO SOON, ONLY 15NS SETUP FOR BD BEFORE BIOXE.
; WOULD NOT LOAD FROM FLOPPY. EIOD FRONT FLANK DELAYED 25NS.

: SAME WITH DAP. DAP HELD FOR THE REST OF THE CYCLE UNTIL TERM
; ON IORQ.
; 060387 JLB: DAP HELD INTO ADDRESS PART OF IOX CYCLES AFTER A
; BUFFERED WRITE CYCLE. SWAPPED IOD FOR IORQ IN EIOD.
; USING CC2 (NEW INPUT) TO QUALIFY DAP AND EIOD
; STATE MACHINE
;
; 180587 M3202B
; 090887 B JLB: MAXIMIZED EQUATIONS TO MATCH CLOCK SKEW.