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bradgrantham-apple2e
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Better textport output and timing 

Only output the textport every 16ms, and only if it's changed.
Be more consistent with throttling to ~1.023MHz by using a constant.
Fix bug where timeslice wasn't reduce when # of instructions was reduced
This commit is contained in:
Brad Grantham 2016-11-14 13:41:57 -08:00
parent 97f1091881
commit d74e6f4f5d
1 changed files with 34 additions and 10 deletions
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44
apple2e.cpp
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@ -84,15 +84,16 @@ const int textport_row_base_addresses[] =
0x7D0,
};
void textport_change(unsigned char *textport)
bool textport_changed = false;
unsigned char textport[24][40];
void textport_display()
{
printf("TEXTPORT:\n");
printf("------------------------------------------\n");
for(int row = 0; row < 24; row++) {
printf("|");
for(int col = 0; col < 40; col++) {
int addr = textport_row_base_addresses[row] - 0x400 + col;
int ch = textport[addr] & 0x7F;
int ch = textport[row][col];
printf("%c", isprint(ch) ? ch : '?');
}
printf("|\n");
@ -100,6 +101,18 @@ void textport_change(unsigned char *textport)
printf("------------------------------------------\n");
}
void textport_change(unsigned char *region)
{
for(int row = 0; row < 24; row++) {
for(int col = 0; col < 40; col++) {
int addr = textport_row_base_addresses[row] - 0x400 + col;
int ch = region[addr] & 0x7F;
textport[row][col] = ch;
}
}
textport_changed = true;
}
struct region
{
string name;
@ -1420,6 +1433,8 @@ string read_bus_and_disassemble(bus_controller &bus, int pc)
return dis;
}
int millis_per_slice = 16;
int main(int argc, char **argv)
{
char *progname = argv[0];
@ -1497,10 +1512,10 @@ int main(int argc, char **argv)
if(have_key) {
if(key == '') {
debugging = true;
clear_strobe();
stop_keyboard();
continue;
debugging = true;
clear_strobe();
stop_keyboard();
continue;
} else {
mainboard->enqueue_key(key);
clear_strobe();
@ -1508,7 +1523,8 @@ int main(int argc, char **argv)
}
chrono::time_point<chrono::system_clock> then;
for(int i = 0; i < 25575; i++) { // ~ 1/10th second
const int inst_per_slice = 255750 * millis_per_slice / 1000;
for(int i = 0; i < inst_per_slice; i++) {
string dis = read_bus_and_disassemble(bus, cpu.pc);
if(debug & DEBUG_DECODE)
printf("%s\n", dis.c_str());
@ -1517,10 +1533,14 @@ int main(int argc, char **argv)
else
cpu.cycle(bus);
}
if(textport_changed) {
textport_display();
textport_changed = false;
}
chrono::time_point<chrono::system_clock> now;
auto elapsed_millis = chrono::duration_cast<chrono::milliseconds>(now - then);
this_thread::sleep_for(chrono::milliseconds(100) - elapsed_millis);
this_thread::sleep_for(chrono::milliseconds(millis_per_slice) - elapsed_millis);
} else {
@ -1552,6 +1572,10 @@ int main(int argc, char **argv)
step6502();
else
cpu.cycle(bus);
if(textport_changed) {
textport_display();
textport_changed = false;
}
}
}
}