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Hack in some MDA text logging. Boot seems to complete?

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This commit is contained in:
Thomas Harte 2023-11-21 11:37:36 -05:00
parent acdf32e820
commit 83ca9b3af5
1 changed files with 24 additions and 2 deletions
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26
Machines/PCCompatible/PCCompatible.cpp
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@ -389,10 +389,19 @@ struct Memory {
}
// Accesses an address based on physical location.
int mda_delay = -1; // HACK.
template <typename IntT, AccessType type>
typename InstructionSet::x86::Accessor<IntT, type>::type access(uint32_t address) {
// TEMPORARY HACK.
if(mda_delay > 0) {
--mda_delay;
if(!mda_delay) {
print_mda();
}
}
if(address >= 0xb'0000 && is_writeable(type)) {
printf("MDA?\n");
mda_delay = 100;
}
// Dispense with the single-byte case trivially.
@ -466,6 +475,19 @@ struct Memory {
std::copy(data, data + length, memory.begin() + std::vector<uint8_t>::difference_type(address));
}
// TEMPORARY HACK.
void print_mda() {
uint32_t pointer = 0xb'0000;
for(int y = 0; y < 25; y++) {
for(int x = 0; x < 80; x++) {
printf("%c", memory[pointer]);
pointer += 2; // MDA goes [character, attributes]...; skip the attributes.
}
printf("\n");
}
}
private:
std::array<uint8_t, 1024*1024> memory{0xff};
Registers &registers_;
@ -708,7 +730,7 @@ class ConcreteMachine:
}
// TODO: signal interrupt.
printf("TODO: should interrupt\n");
// printf("TODO: should interrupt\n");
}
// Get the next thing to execute.