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164 lines (148 loc) · 2.61 KB
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#include "11.h"
#include "kl11.h"
int
dati_kl11(Bus *bus, void *dev)
{
KL11 *kl = dev;
if(bus->addr >= 0777560 && bus->addr < 0777570){
switch(bus->addr&6){
/* Receive */
case 0:
bus->data = kl->rcd_int_enab<<6 |
kl->rcd_int<<7 |
kl->rcd_busy<<1;
break;
case 2:
bus->data = kl->rcd_b;
kl->rcd_b = 0;
kl->rcd_da = 0;
kl->rcd_int = 0;
break;
/* Transmit */
case 4:
bus->data = kl->xmit_maint<<2 |
kl->xmit_int_enab<<6 |
kl->xmit_int<<7;
break;
case 6:
/* write only */
bus->data = 0;
break;
default: assert(0); /* can't happen */
}
return 0;
}
return 1;
}
int
dato_kl11(Bus *bus, void *dev)
{
KL11 *kl = dev;
if(bus->addr >= 0777560 && bus->addr < 0777570){
switch(bus->addr&7){
/* Receive */
case 0:
// TODO: RDR ENAB
kl->rcd_rdr_enab = bus->data & 1;
if(!kl->rcd_int_enab && bus->data&0100 && kl->rcd_da)
kl->rcd_int = 1;
kl->rcd_int_enab = bus->data>>6 & 1;
break;
case 2:
/* read only */
break;
/* Transmit */
case 4:
// TODO: MAINT
kl->xmit_maint = bus->data>>2 & 1;
if(!kl->xmit_int_enab && bus->data&0100 && kl->xmit_tbmt)
kl->xmit_int = 1;
kl->xmit_int_enab = bus->data>>6 & 1;
break;
case 6:
kl->xmit_b = bus->data;
kl->xmit_tbmt = 0;
kl->xmit_int = 0;
break;
/* respond but don't do anything */
case 1:
case 3:
case 5:
case 7:
break;
default: assert(0); /* can't happen */
}
return 0;
}
return 1;
}
int
datob_kl11(Bus *bus, void *dev)
{
return dato_kl11(bus, dev);
}
int NNN;
int
svc_kl11(Bus *bus, void *dev)
{
KL11 *kl = dev;
NNN++;
// if(NNN == 20){
if(NNN == 20000){
/* transmit */
if(!kl->xmit_tbmt){
uint8 c = kl->xmit_b & 0177;
write(kl->ttyfd, &c, 1);
#ifdef AUTODIAG
extern int diagpassed;
if(c == '\a')
diagpassed = 1;
#endif
kl->xmit_tbmt = 1;
kl->xmit_int = 1;
}
/* receive */
if(hasinput(kl->ttyfd)){
kl->rcd_busy = 1;
kl->rcd_rdr_enab = 0;
read(kl->ttyfd, &kl->rcd_b, 1);
kl->rcd_da = 1;
kl->rcd_busy = 0;
kl->rcd_int = 1;
}
NNN = 0;
}
return kl->rcd_int && kl->rcd_int_enab ||
kl->xmit_int && kl->xmit_int_enab ? 4 : 0;
}
int
bg_kl11(void *dev)
{
KL11 *kl = dev;
if(kl->rcd_int && kl->rcd_int_enab){
kl->rcd_int = 0;
return 060;
}
if(kl->xmit_int && kl->xmit_int_enab){
kl->xmit_int = 0;
return 064;
}
assert(0); // can't happen
return 0;
}
void
reset_kl11(void *dev)
{
KL11 *kl = dev;
kl->rcd_busy = 0;
kl->rcd_rdr_enab = 0;
kl->rcd_int_enab = 0;
kl->rcd_int = 0;
kl->rcd_da = 0;
kl->rcd_b = 0;
kl->xmit_int_enab = 0;
kl->xmit_maint = 0;
kl->xmit_int = 1;
kl->xmit_tbmt = 1;
kl->xmit_b = 0;
}