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made transistor state into a real bitfield

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This commit is contained in:
Michael Steil 2010-09-22 23:14:18 +00:00
parent 7114c787af
commit 5af952121c
2 changed files with 22 additions and 14 deletions
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1
Makefile
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@ -1,5 +1,6 @@
OBJS=runtime.o plugin.o perfect6502.o console.o
CFLAGS=-Wall -O3
CC=clang
all: cbmbasic

35
perfect6502.c
View File

@ -61,13 +61,28 @@ node_t nodes[NODES];
typedef struct {
transnum_t name;
BOOL on;
nodenum_t gate;
nodenum_t c1;
nodenum_t c2;
} transistor_t;
transistor_t transistors[TRANSISTORS];
int transistors_on[TRANSISTORS/sizeof(int)];
void
set_transistors_on(transnum_t t, BOOL state)
{
if (state)
transistors_on[t>>5] |= 1 << (t & 31);
else
transistors_on[t>>5] &= ~(1 << (t & 31));
}
BOOL
get_transistors_on(transnum_t t)
{
return (transistors_on[t>>5] >> (t & 31)) & 1;
}
uint8_t memory[65536];
int cycle;
@ -97,20 +112,12 @@ setupTransistors()
nodenum_t c1 = transdefs[i].c1;
nodenum_t c2 = transdefs[i].c2;
transistors[i].name = i;
transistors[i].on = NO;
transistors[i].gate = gate;
transistors[i].c1 = c1;
transistors[i].c2 = c2;
// printf("1 gate=%d, gatecount=%d\n", gate, nodes[gate].gatecount);
nodes[gate].gates[nodes[gate].gatecount++] = i;
// printf("2 gate=%d, gatecount=%d\n", gate, nodes[gate].gatecount);
if (nodes[gate].gatecount > NODES)
printf("0BIG\n");
nodes[c1].c1c2s[nodes[c1].c1c2count++] = i;
nodes[c2].c1c2s[nodes[c2].c1c2count++] = i;
// printf("3 gate=%d, c1c2count=%d\n", gate, nodes[gate].c1c2count);
if (nodes[gate].c1c2count > 2*NODES)
printf("1BIG\n");
}
}
@ -175,7 +182,7 @@ addNodeTransistor(nodenum_t node, transnum_t t)
printf("%s n=%d, t=%d, group=", __func__, node, t);
printarray(group, groupcount);
#endif
if (!transistors[t].on)
if (!get_transistors_on(t))
return;
nodenum_t other;
if (transistors[t].c1 == node)
@ -285,9 +292,9 @@ recalcTransistor(transnum_t tn)
#endif
transistor_t *t = &transistors[tn];
BOOL on = isNodeHigh(t->gate);
if (on == t->on)
if (on == get_transistors_on(tn))
return;
t->on = on;
set_transistors_on(tn, on);
if (!on) {
floatnode(t->c1);
floatnode(t->c2);
@ -806,7 +813,7 @@ initChip()
nodes[npwr].state = STATE_VCC;
transnum_t tn;
for (tn = 0; tn < TRANSISTORS; tn++)
transistors[tn].on = NO;
set_transistors_on(tn, NO);
setLow(res);
setLow(clk0);
setHigh(rdy);
@ -824,7 +831,7 @@ initChip()
string = '';
for (var i in transistors) {
string += ' '+transistors[i].on;
string += ' '+transistors_on[i];
}
console.log(string);
#endif