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Adds preliminary, non-error-checking wiring in of MSX parser alternatives to TAPION and TAPIN.

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As both a prototype of the pending fast tape loading, and to provide for exact behaviour comparison.
This commit is contained in:
Thomas Harte 2017-12-26 22:31:34 -05:00
parent c4950574ea
commit 11b73a9c0b
1 changed files with 26 additions and 0 deletions
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26
Machines/MSX/MSX.cpp
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@ -17,6 +17,7 @@
#include "../../Components/8255/i8255.hpp"
#include "../../Components/AY38910/AY38910.hpp"
#include "../../Storage/Tape/Parsers/MSX.hpp"
#include "../../Storage/Tape/Tape.hpp"
#include "../CRTMachine.hpp"
@ -178,6 +179,31 @@ class ConcreteMachine:
uint16_t address = cycle.address ? *cycle.address : 0x0000;
switch(cycle.operation) {
case CPU::Z80::PartialMachineCycle::ReadOpcode:
if(address == 0x1a63) {
// TAPION
tape_player_.set_motor_control(true);
using Parser = Storage::Tape::MSX::Parser;
std::unique_ptr<Parser::FileSpeed> new_speed = Parser::find_header(tape_player_);
ram_[0xFCA4] = new_speed->minimum_start_bit_duration;
ram_[0xFCA5] = new_speed->low_high_disrimination_duration;
*cycle.value = 0xc9;
break;
}
if(address == 0x1abc) {
// TAPIN
using Parser = Storage::Tape::MSX::Parser;
Parser::FileSpeed tape_speed;
tape_speed.minimum_start_bit_duration = ram_[0xFCA4];
tape_speed.low_high_disrimination_duration = ram_[0xFCA5];
// printf("Low lim: %02x / win wid: %02x\n", ram_[0xFCA4], ram_[0xFCA5]);
int next_byte = Parser::get_byte(tape_speed, tape_player_);
z80_.set_value_of_register(CPU::Z80::Register::A, static_cast<uint16_t>(next_byte));
*cycle.value = 0xc9;
break;
}
case CPU::Z80::PartialMachineCycle::Read:
*cycle.value = read_pointers_[address >> 14][address & 16383];
break;