Figure A-1. IOPLD1 Equations Contd | Intel 386 instruction

LOCAL BUS CONTROL PLD DESCRIPTIONS

"io state machine

state_diagram (iord,iowr,eprd,inta,iordy,recv1; state idle:

case na & !buscyc & pa31 & !wr & clk: epreadl;

na & !buscyc & !pa31 & !mio & dc & wr & clk: iowritel;

na & !buscyc & !pa31 & !mio & dc & !wr & elk: ioreadl;

na & !buscyc & !pa31 & !mio & !dc & !wr & clk: intakl;

na & !buscyc & mio & !dc & wr & clk: iowrite2; "halt endcase;

state epreadl: if (!timedly & clk) then epread2 else epreadl;

state epread2: if (clk) then idle else epread2;

state iowritel: if (!timedly & clk) then iowrite2 else iowritel;

state	iowrite2: if		(!mio & clk) then	recover
		else if (mio & clk) then idle
		else iowrite2;
state	ioreadl:	if	(!timedly & clk)	then	ioread2 else	ioreadl;
state	ioread2:	if (clk) then recover else ioread2;
state	intakl:	if	(!timedly & clk)	then	intak2 else	intakl;
state	intak2:	if (clk) then recover else intak2;
state	recover:	if	(!timedly & clk)	then	idle else recover;

test_vectors ([clk2,clk,na,mio,wr,dc,pa31,timedly,buscyc,oe1 ->[iord,iowr,eprd,inta,iordy,recv1);

[c,h,h,h,h,h,h,h,h,ll ->[h,h,h,h,h,h1; [c,h,h,h,h,h,h,h,h,ll ->[h,h,h,h,h,h1; {c,h,h,h,h,h,h,h,h,ll ->[h,h,h,h,h,h1;

[c,h,h,h,l,l,h,h,l,ll ->(h,h, 1,h,h,h1; (c,h,h,h,l,l,h,h,l.ll ->(h,h, 1 ,h,h,h1; [c,h,h,h,l,l,h,h,l,ll ->[h,h, 1 ,h,h,h1; [c,h,h,h,l,l,h,h,l,ll ->[h,h, 1,h,h,h1; [c,h,h,h,l,l,h,l,l,ll ->[h,h,1,h,1,h1; [c,h,h,h,h,h,h,h, h, 11 ->[h,h,h,h,h,h1;

[c,h,h,l,l,h,l,h,l,ll ->[1 ,h,h,h,h,h1; [c,h,h,l,l,h,l,h,l,ll ->[1 ,h,h,h,h,h1; [c,h,h,l,l,h,l,h,l,ll ->[l,h,h,h,h,h1; [c,h,h,l,l,h,l,h,l,ll ->[1,h,h,h,h,h1; [c,h,h,l,l,h,l,l,l,lJ ->[l,h,h,h,1,h1; [c,h,h,h,h,h,h,h,h,ll ->[h,h,h,h,h,ll; [c,h,h,h,h,h,h,h ,h, 11 ->[h,h,h,h,h,lJ ; (c,h,h,h,h,h,h,l,h,ll ->[h,h,h,h,h,h1;

[c,h,h,l,h,h,l,h,l,ll ->[h,1,h,h,h,h1; [c,h,h,l,h,h,l,h,l,ll ->[h,1,h,h,h,h1; [c,h,h,l,h,h,l,h,l,ll ->[h,1,h,h,h,h1; [c,h,h,l,h,h,l,h,l,ll ->(h,1,h,h,h,h1; [c,h,h,l,h,h,l,l,l,ll ->[h,h,h,h,1,h1; [c,h,h,l,h,h,h,h,h,ll ->[h,h,h,h,h,ll; [c,h,h,h,h,h,h,h,h,ll ->[h,h,h,h,h,ll; [c,h,h,h,h,h,h,l,h,ll ->[h,h,h,h,h,h1;

[c,h,h,l,l,l,l,h,l,ll ->[h,h,h,1,h,h1; [c,h,h,l,l,l,l,h,l,ll ->[h,h,h, 1,h,h1; [c,h,h,l,l,l,l,h,l,lJ ->[h,h,h,1,h,h1; [c,h,h,l,l,l,l,h,l,ll ->[h,h,h,1,h,h1; [c,h,h,l,l,l,l,l,l,ll ->[h,h,h,1,1,h1; [c,h,h,h,h,h,h,h,h,ll ->[h,h,h,h,h,lJ ; [c,h,h,h,h,h,h,h,h,ll ->[h,h,h,h,h,ll; [c,h,h,h,h,h,h,l,h,ll ->[h,h,h,h,h,h1;

[c,h,h,h,h,l,l,h,l,ll ->[h,h,h,h,1,h1;

,'idle

I 'eprom read

,'eprom read

,I eprom read

,'eprom read

,'idle

,'io read

,, i a read

,'io read

,'recovery

,I io write

,'io write

l' io write

,'io write "io write

,'recovery

"interrupt ack "interrupt ack

,'interrupt ack

,'interrupt ack "interrupt ack "recovery

"recovery

,'recovery

"ha lt or shutdown

Figure A-1. IOPLD1 Equations (Contd.)

A-4

Intel 386 manual Figure A-1. IOPLD1 Equations Contd

Models: 386

Figure A-1. IOPLD1 Equations (Contd.)