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Attempts to fix BBC.

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But thereby stops all ADB output.
This commit is contained in:
Thomas Harte 2021-01-25 22:34:03 -05:00
parent fc4bda0047
commit 413e42e1b6
1 changed files with 10 additions and 8 deletions
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18
InstructionSets/M50740/Executor.cpp
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@ -165,7 +165,7 @@ template<bool is_brk> inline void Executor::perform_interrupt() {
}
template <Operation operation, AddressingMode addressing_mode> void Executor::perform() {
// printf("%04x\t%02x\t%d %d\t[x:%02x s:%02x]\t(%s)\n", program_counter_ & 0x1fff, memory_[program_counter_ & 0x1fff], int(operation), int(addressing_mode), x_, s_, __PRETTY_FUNCTION__ );
// printf("%04x\t%02x\t%d %d\t[a:%02x x:%02x y:%02x p:%02x s:%02x]\t(%s)\n", program_counter_ & 0x1fff, memory_[program_counter_ & 0x1fff], int(operation), int(addressing_mode), a_, x_, y_, flags(), s_, __PRETTY_FUNCTION__ );
// Post cycle cost; this emulation _does not provide accurate timing_.
#define TLength(mode, base) case AddressingMode::mode: subtract_duration(base + t_lengths[index_mode_]); break;
@ -366,23 +366,25 @@ template <Operation operation, AddressingMode addressing_mode> void Executor::pe
program_counter_ += 1 + size(addressing_mode);
switch(operation) {
case Operation::BBS0: case Operation::BBS1: case Operation::BBS2: case Operation::BBS3:
case Operation::BBS4: case Operation::BBS5: case Operation::BBS6: case Operation::BBS7:
case Operation::BBS4: case Operation::BBS5: case Operation::BBS6: case Operation::BBS7: {
if constexpr (operation >= Operation::BBS0 && operation <= Operation::BBS7) {
if(value & (1 << (int(operation) - int(Operation::BBS0)))) {
constexpr uint8_t mask = 1 << (int(operation) - int(Operation::BBS0));
if(value & mask) {
set_program_counter(uint16_t(address));
subtract_duration(2);
}
}
return;
} return;
case Operation::BBC0: case Operation::BBC1: case Operation::BBC2: case Operation::BBC3:
case Operation::BBC4: case Operation::BBC5: case Operation::BBC6: case Operation::BBC7:
if constexpr (operation >= Operation::BBC0 && operation <= Operation::BBS7) {
if(value & (1 << (int(operation) - int(Operation::BBC0)))) {
case Operation::BBC4: case Operation::BBC5: case Operation::BBC6: case Operation::BBC7: {
if constexpr (operation >= Operation::BBC0 && operation <= Operation::BBC7) {
constexpr uint8_t mask = 1 << (int(operation) - int(Operation::BBC0));
if(!(value & mask)) {
set_program_counter(uint16_t(address));
subtract_duration(2);
}
}
return;
} return;
default: assert(false);
}
} break;