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Imported the ZX80 and 81 system ROMs (though not publicly), added enough code to post their contents into C++ world.

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This commit is contained in:
Thomas Harte
2017-06-04 18:08:35 -04:00
parent b0a7c58287
commit c485c460f7
5 changed files with 43 additions and 2 deletions
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Processors/Z80/Z80.hpp
+5 -2
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@@ -775,7 +775,10 @@ template <class T> class Processor {
while(bus_request_line_) {
static MachineCycle bus_acknowledge_cycle = {BusOperation::BusAcknowledge, 1};
number_of_cycles_ -= static_cast<T *>(this)->perform_machine_cycle(bus_acknowledge_cycle) + 1;
if(!number_of_cycles_) return;
if(!number_of_cycles_) {
flush();
return;
}
}
while(!bus_request_line_) {
@@ -790,7 +793,7 @@ template <class T> class Processor {
switch(operation->type) {
case MicroOp::BusOperation:
if(number_of_cycles_ < operation->machine_cycle.length) { scheduled_program_counter_--; return; }
if(number_of_cycles_ < operation->machine_cycle.length) { scheduled_program_counter_--; flush(); return; }
number_of_cycles_ -= operation->machine_cycle.length;
last_request_status_ = request_status_;
number_of_cycles_ -= static_cast<T *>(this)->perform_machine_cycle(operation->machine_cycle);