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line number calculation

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This commit is contained in:
folkert van heusden 2024-04-30 10:28:46 +02:00
parent ac6c10f349
commit 22b43f25b3
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
1 changed files with 23 additions and 7 deletions
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30
dc11.cpp
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@ -33,7 +33,8 @@ dc11::~dc11()
void dc11::trigger_interrupt(const int line_nr)
{
b->getCpu()->queue_interrupt(4, 0300 + line_nr * 4);
printf("Interrupt %d\r\n", line_nr);
b->getCpu()->queue_interrupt(5, 0300 + line_nr * 4);
}
void dc11::operator()()
@ -116,7 +117,7 @@ void dc11::operator()()
char buffer[32] { };
int rc = read(pfds[i].fd, buffer, sizeof buffer);
if (rc <= 0) { // closed or error?
DOLOG(info, false, "Failed reading on port %d", base_port + i + 1);
DOLOG(info, false, "Failed reading on port %d", i - dc11_n_lines + 1);
close(pfds[i].fd);
pfds[i].fd = -1;
}
@ -134,6 +135,19 @@ void dc11::operator()()
trigger_interrupt(line_nr);
}
}
// emulate DTR, CTS & READY
for(int i=0; i<dc11_n_lines; i++) {
registers[i * 4 + 0] &= ~1; // DTR: bit 0
registers[i * 4 + 2] &= ~2; // CTS: bit 1
registers[i * 4 + 2] &= ~128; // READY: bit 7
if (pfds[i + dc11_n_lines].fd != -1) {
registers[i * 4 + 0] |= 1;
registers[i * 4 + 2] |= 2;
registers[i * 4 + 2] |= 128;
}
}
}
DOLOG(info, true, "DC11 thread terminating");
@ -161,7 +175,7 @@ uint8_t dc11::read_byte(const uint16_t addr)
uint16_t dc11::read_word(const uint16_t addr)
{
int reg = (addr - DC11_BASE) / 2;
int line_nr = reg / 8;
int line_nr = reg / 4;
uint16_t vtemp = registers[reg];
@ -180,7 +194,8 @@ uint16_t dc11::read_word(const uint16_t addr)
}
}
DOLOG(debug, false, "DC11: read register %06o (%d): %06o", addr, reg, vtemp);
DOLOG(debug, true, "DC11: read register %06o (%d): %06o", addr, reg, vtemp);
printf("DC11: read register %06o (%d): %06o\r\n", addr, reg, vtemp);
return vtemp;
}
@ -204,15 +219,16 @@ void dc11::write_byte(const uint16_t addr, const uint8_t v)
void dc11::write_word(const uint16_t addr, uint16_t v)
{
int reg = (addr - DC11_BASE) / 2;
int line_nr = reg / 8;
int line_nr = reg / 4;
DOLOG(debug, false, "DC11: write register %06o (%d) to %o", addr, reg, v);
DOLOG(debug, true, "DC11: write register %06o (%d) to %06o", addr, reg, v);
printf("DC11: write register %06o (%d) to %06o\r\n", addr, reg, v);
if ((reg & 3) == 3) { // transmit buffer
char c = v;
// TODO handle failed transmit
(void)write(pfds[dc11_n_lines + line_nr].fd, &c, 1);
printf("%ld\r\n", write(pfds[dc11_n_lines + line_nr].fd, &c, 1));
if (registers[line_nr * 4 + 2] & 64)
trigger_interrupt(line_nr);