Name PDP_GAL0; 
Assembly 0001; 
Revision 1.0; 
PartNo U28 22V10; 
Device G22V10; 
Company S100Computers.com; 
Designer John Monahan; 
Location CA,San Ramon; 
Date 25 April 2017


property ATMEL { xor_synthesis=on }; 
property ATMEL { logic_doubling=on }; 
property ATMEL { jtag=on }; 
PROPERTY ATMEL { preassign keep }; 
PROPERTY ATMEL { TMS_pullup=on }; 
PROPERTY ATMEL { TDI_pullup=on }; 


/*
* Design to switch in PDP11 board as a slave
* Pin assignments 
* Make all data and address outputs fast slew and all chip selects slow 
*/ 

PIN 1  = PULSE_IN;            /* address lines  */
PIN 2  = LA0;
PIN 3  = LA1;
PIN 4  = LA2;
PIN 5  = LA3;
PIN 6  = LA4;
PIN 7  = LA5;
PIN 8  = LA6;
PIN 9  = LA7;
PIN 10 = LA8;
PIN 11 = LA9;
Pin 12 = GND;

Pin 13 = LA10;
Pin 14 = LA11;
Pin 15 = S100_LA12;
Pin 16 = S100_LA13;
Pin 17 = S100_LA14;
Pin 18 = S100_LA15;
Pin 19 = sINP;
Pin 20 = pDBIN;
Pin 21 = MASTER_RESET;
Pin 22 = TMAXPU;
Pin 23 = PULSE_OUT;


!PULSE_OUT   =    ((LA0 & !LA1 & LA2 & LA3 & !LA4 & LA5 & LA6 & LA7                                     
                 & !LA8 & !LA9 & !LA10 & !LA11 & !S100_LA12 & !S100_LA13 & !S100_LA14 & !S100_LA15)   
                 & (sINP & pDBIN));
TMAXPU.D     =     !TMAXPU;

TMAXPU.ar    = !MASTER_RESET;
TMAXPU.sp    = !TMAXPU;