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invalid page access

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This commit is contained in:
folkert van heusden 2022-03-30 14:44:10 +02:00
parent 39535989be
commit 22ef613d91
1 changed files with 22 additions and 16 deletions
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38
bus.cpp
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@ -63,6 +63,9 @@ uint16_t bus::read(const uint16_t a, const bool word_mode, const bool use_prev)
int run_mode = c->getPSW() >> 14;
if (a >= 0160000) {
if (word_mode)
fprintf(stderr, "READ I/O %06o in byte mode\n", a);
if (a == 0177750) { // MAINT
D(fprintf(stderr, "read MAINT\n");)
return 1; // POWER OK
@ -85,6 +88,7 @@ uint16_t bus::read(const uint16_t a, const bool word_mode, const bool use_prev)
if (a == 0177546) { // line frequency clock and status register
D(fprintf(stderr, "read line freq clock\n");)
CSR |= 128;
return CSR;
}
@ -318,17 +322,18 @@ uint16_t bus::read(const uint16_t a, const bool word_mode, const bool use_prev)
bool direction = pages[run_mode][apf].pdr & 8;
if ((p_offset >= pdr_len && direction == false) || (p_offset < pdr_len && direction == true)) {
D(fprintf(stderr, "bus::read::p_offset %o >= %o\n", p_offset, pdr_len);)
c->schedule_trap(0250); // invalid access
if (m_offset >= n_pages * 8192) {
D(fprintf(stderr, "bus::read %o >= %o\n", m_offset, n_pages * 8192);)
c->schedule_trap(04); // invalid address
pages[run_mode][apf].pdr |= 1 << 7;
throw 1;
}
else if (m_offset >= n_pages * 8192) {
D(fprintf(stderr, "bus::read %o >= %o\n", m_offset, n_pages * 8192);)
c->schedule_trap(04); // invalid address
if ((p_offset >= pdr_len && direction == false) || (p_offset < pdr_len && direction == true)) {
D(fprintf(stderr, "bus::read::p_offset %o >= %o\n", p_offset, pdr_len);)
c->schedule_trap(0250); // invalid access
pages[run_mode][apf].pdr |= 1 << 7;
@ -341,7 +346,7 @@ uint16_t bus::read(const uint16_t a, const bool word_mode, const bool use_prev)
else
temp = m -> readWord(m_offset);
D(fprintf(stderr, "BUS read from %o (pages: %o/%o/%o, run mode %d, apf %d, PDR: %06o, b22: %d): %06o\n", m_offset, pages[run_mode][apf].par, pages[run_mode][apf].par * 64, n_pages * 8192, run_mode, apf, pages[run_mode][apf].pdr, MMR3 & 16, temp);)
// D(fprintf(stderr, "BUS read from %o (pages: %o/%o/%o, run mode %d, apf %d, PDR: %06o, b22: %d): %06o\n", m_offset, pages[run_mode][apf].par, pages[run_mode][apf].par * 64, n_pages * 8192, run_mode, apf, pages[run_mode][apf].pdr, MMR3 & 16, temp);)
return temp;
}
@ -609,25 +614,26 @@ uint16_t bus::write(const uint16_t a, const bool word_mode, uint16_t value, cons
bool direction = pages[run_mode][apf].pdr & 8;
if (m_offset >= n_pages * 8192) {
D(fprintf(stderr, "bus::write %o >= %o\n", m_offset, n_pages * 8192);)
c->schedule_trap(04); // invalid address
pages[run_mode][apf].pdr |= 1 << 7;
throw 1;
}
if ((p_offset >= pdr_len && direction == false) || (p_offset < pdr_len && direction == true)) {
D(fprintf(stderr, "bus::write::p_offset %o >= %o\n", p_offset, pdr_len);)
c->schedule_trap(0250); // invalid access
pages[run_mode][apf].pdr |= 1 << 7;
throw 1;
}
else if (m_offset >= n_pages * 8192) {
D(fprintf(stderr, "bus::write %o >= %o\n", m_offset, n_pages * 8192);)
c->schedule_trap(04); // invalid address
pages[run_mode][apf].pdr |= 1 << 7;
throw 1;
}
}
D(fprintf(stderr, "BUS write to %o (pages: %o/%o/%o, run mode %d, apf %d, PDR: %06o, b22: %d): %06o\n", m_offset, pages[run_mode][apf].par, pages[run_mode][apf].par * 64, n_pages * 8192, run_mode, apf, pages[run_mode][apf].pdr, MMR3 & 16, value);)
// D(fprintf(stderr, "BUS write to %o (pages: %o/%o/%o, run mode %d, apf %d, PDR: %06o, b22: %d): %06o\n", m_offset, pages[run_mode][apf].par, pages[run_mode][apf].par * 64, n_pages * 8192, run_mode, apf, pages[run_mode][apf].pdr, MMR3 & 16, value);)
if (word_mode)
m->writeByte(m_offset, value);