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Parker Bros paging is back.

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This commit is contained in:
Thomas Harte 2017-03-18 18:21:01 -04:00
parent a4cd12394e
commit df6861c9dc
3 changed files with 60 additions and 61 deletions
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73
Machines/Atari2600/Atari2600.cpp
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@ -15,6 +15,7 @@
#include "CartridgeAtari32k.hpp"
#include "CartridgeActivisionStack.hpp"
#include "CartridgeCommaVid.hpp"
#include "CartridgeParkerBros.hpp"
#include "CartridgeUnpaged.hpp"
using namespace Atari2600;
@ -77,18 +78,15 @@ void Machine::set_switch_is_enabled(Atari2600Switch input, bool state) {
}
void Machine::configure_as_target(const StaticAnalyser::Target &target) {
const std::vector<uint8_t> &rom = target.cartridges.front()->get_segments().front().data;
switch(target.atari.paging_model) {
case StaticAnalyser::Atari2600PagingModel::None:
bus_.reset(new CartridgeUnpaged(target.cartridges.front()->get_segments().front().data));
break;
case StaticAnalyser::Atari2600PagingModel::CommaVid:
bus_.reset(new CartridgeCommaVid(target.cartridges.front()->get_segments().front().data));
break;
case StaticAnalyser::Atari2600PagingModel::None: bus_.reset(new CartridgeUnpaged(rom)); break;
case StaticAnalyser::Atari2600PagingModel::CommaVid: bus_.reset(new CartridgeCommaVid(rom)); break;
case StaticAnalyser::Atari2600PagingModel::Atari8k:
if(target.atari.uses_superchip) {
bus_.reset(new CartridgeAtari8kSuperChip(target.cartridges.front()->get_segments().front().data));
bus_.reset(new CartridgeAtari8kSuperChip(rom));
} else {
bus_.reset(new CartridgeAtari8k(target.cartridges.front()->get_segments().front().data));
bus_.reset(new CartridgeAtari8k(rom));
}
break;
case StaticAnalyser::Atari2600PagingModel::Atari16k:
@ -108,49 +106,12 @@ void Machine::configure_as_target(const StaticAnalyser::Target &target) {
case StaticAnalyser::Atari2600PagingModel::ActivisionStack:
bus_.reset(new CartridgeActivisionStack(target.cartridges.front()->get_segments().front().data));
break;
}
/* if(!target.cartridges.front()->get_segments().size()) return;
Storage::Cartridge::Cartridge::Segment segment = target.cartridges.front()->get_segments().front();
size_t length = segment.data.size();
rom_size_ = length;
delete[] rom_;
rom_ = new uint8_t[rom_size_];
size_t offset = 0;
const size_t copy_step = std::min(rom_size_, length);
while(offset < rom_size_) {
size_t copy_length = std::min(copy_step, rom_size_ - offset);
memcpy(&rom_[offset], &segment.data[0], copy_length);
offset += copy_length;
}
// On a real paged cartridge, any page may initially be visible. Various homebrew authors appear to have
// decided the last page will always be initially visible. So do that.
size_t rom_mask = rom_size_ - 1;
uint8_t *rom_base = rom_;
if(rom_size_ > 4096) rom_base = &rom_[rom_size_ - 4096];
rom_pages_[0] = rom_base;
rom_pages_[1] = &rom_base[1024 & rom_mask];
rom_pages_[2] = &rom_base[2048 & rom_mask];
rom_pages_[3] = &rom_base[3072 & rom_mask];
// By default, throw all stores away, and don't ever read from RAM
for(int c = 0; c < sizeof(ram_write_targets_) / sizeof(*ram_write_targets_); c++) {
ram_write_targets_[c] = throwaway_ram_;
ram_read_targets_[c] = nullptr;
}
switch(target.atari.paging_model) {
default:
if(target.atari.uses_superchip) {
// allocate 128 bytes of RAM; allow writing from 0x1000, reading from 0x1080
ram_.resize(128);
ram_write_targets_[0] = ram_.data();
ram_read_targets_[1] = ram_write_targets_[0];
}
case StaticAnalyser::Atari2600PagingModel::ParkerBros:
bus_.reset(new CartridgeParkerBros(rom));
break;
}
/* switch(target.atari.paging_model) {
case StaticAnalyser::Atari2600PagingModel::CBSRamPlus:
// allocate 256 bytes of RAM; allow writing from 0x1000, reading from 0x1100
ram_.resize(256);
@ -159,14 +120,6 @@ void Machine::configure_as_target(const StaticAnalyser::Target &target) {
ram_read_targets_[2] = ram_write_targets_[0];
ram_read_targets_[3] = ram_write_targets_[1];
break;
case StaticAnalyser::Atari2600PagingModel::CommaVid:
// allocate 1kb of RAM; allow reading from 0x1000, writing from 0x1400
ram_.resize(1024);
for(int c = 0; c < 8; c++) {
ram_read_targets_[c] = ram_.data() + 128 * c;
ram_write_targets_[c + 8] = ram_.data() + 128 * c;
}
break;
case StaticAnalyser::Atari2600PagingModel::MegaBoy:
mega_boy_page_ = 15;
break;
@ -183,9 +136,7 @@ void Machine::configure_as_target(const StaticAnalyser::Target &target) {
rom_pages_[2] = rom_pages_[0] + 2048;
rom_pages_[3] = rom_pages_[0] + 3072;
break;
}
paging_model_ = target.atari.paging_model;*/
}*/
}
#pragma mark - CRT delegate

46
Machines/Atari2600/CartridgeParkerBros.hpp Normal file
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@ -0,0 +1,46 @@
//
// CartridgeParkerBros.h
// Clock Signal
//
// Created by Thomas Harte on 18/03/2017.
// Copyright © 2017 Thomas Harte. All rights reserved.
//
#ifndef Atari2600_CartridgeParkerBros_hpp
#define Atari2600_CartridgeParkerBros_hpp
#include "Cartridge.hpp"
namespace Atari2600 {
class CartridgeParkerBros: public Cartridge<CartridgeParkerBros> {
public:
CartridgeParkerBros(const std::vector<uint8_t> &rom) :
Cartridge(rom) {
rom_ptr_[0] = rom_.data() + 4096;
rom_ptr_[1] = rom_ptr_[0] + 1024;
rom_ptr_[2] = rom_ptr_[1] + 1024;
rom_ptr_[3] = rom_ptr_[2] + 1024;
}
void perform_bus_operation(CPU6502::BusOperation operation, uint16_t address, uint8_t *value) {
address &= 0x1fff;
if(!(address & 0x1000)) return;
if(address >= 0x1fe0 && address < 0x1ff8) {
int slot = (address >> 3)&3;
rom_ptr_[slot] = rom_.data() + ((address & 7) * 1024);
}
if(isReadOperation(operation)) {
*value = rom_ptr_[(address >> 10)&3][address & 1023];
}
}
private:
uint8_t *rom_ptr_[4];
};
}
#endif /* Atari2600_CartridgeParkerBros_hpp */

2
OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
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@ -947,6 +947,7 @@
4BEAC0781E7DD86E00EE56B2 /* CartridgeAtari16k.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = CartridgeAtari16k.hpp; sourceTree = "<group>"; };
4BEAC0791E7DD86E00EE56B2 /* CartridgeAtari32k.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = CartridgeAtari32k.hpp; sourceTree = "<group>"; };
4BEAC07A1E7DDFDA00EE56B2 /* CartridgeActivisionStack.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = CartridgeActivisionStack.hpp; sourceTree = "<group>"; };
4BEAC07B1E7DE74200EE56B2 /* CartridgeParkerBros.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = CartridgeParkerBros.hpp; sourceTree = "<group>"; };
4BEE0A6A1D72496600532C7B /* Cartridge.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = Cartridge.cpp; sourceTree = "<group>"; };
4BEE0A6B1D72496600532C7B /* Cartridge.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = Cartridge.hpp; sourceTree = "<group>"; };
4BEE0A6D1D72496600532C7B /* PRG.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = PRG.cpp; sourceTree = "<group>"; };
@ -1120,6 +1121,7 @@
4BEAC0781E7DD86E00EE56B2 /* CartridgeAtari16k.hpp */,
4BEAC0791E7DD86E00EE56B2 /* CartridgeAtari32k.hpp */,
4BA443E71E7DB54700C86749 /* CartridgeCommaVid.hpp */,
4BEAC07B1E7DE74200EE56B2 /* CartridgeParkerBros.hpp */,
4BE0699A1E7C9C5A00DD379F /* CartridgeUnpaged.hpp */,
4BEA52671DF34909007E74F2 /* PIA.hpp */,
4BEA52651DF3472B007E74F2 /* Speaker.hpp */,