| 1 |
#include "PanasonicMemory.hh" |
| 2 |
|
| 3 |
#include "Ram.hh" |
| 4 |
#include "Rom.hh" |
| 5 |
|
| 6 |
#include "DeviceConfig.hh" |
| 7 |
#include "HardwareConfig.hh" |
| 8 |
#include "MSXCPU.hh" |
| 9 |
#include "MSXException.hh" |
| 10 |
#include "MSXMotherBoard.hh" |
| 11 |
#include "XMLElement.hh" |
| 12 |
|
| 13 |
#include "narrow.hh" |
| 14 |
|
| 15 |
#include <memory> |
| 16 |
|
| 17 |
namespace openmsx { |
| 18 |
|
| 19 |
PanasonicMemory::PanasonicMemory(MSXMotherBoard& motherBoard) |
| 20 |
: msxcpu(motherBoard.getCPU()) |
| 21 |
, rom([&] -> std::optional<Rom> { |
| 22 |
auto* elem = motherBoard.getMachineConfig()-> |
| 23 |
getConfig().findChild("PanasonicRom"); |
| 24 |
if (!elem) return std::nullopt; |
| 25 |
|
| 26 |
HardwareConfig* hwConf = motherBoard.getMachineConfig(); |
| 27 |
assert(hwConf); |
| 28 |
DeviceConfig config(*hwConf, *elem); |
| 29 |
return std::optional<Rom>(std::in_place, |
| 30 |
"PanasonicRom", "Turbor-R main ROM", config); |
| 31 |
}()) |
| 32 |
{ |
| 33 |
} |
| 34 |
|
| 35 |
void PanasonicMemory::registerRam(Ram& ram_) |
| 36 |
{ |
| 37 |
ram = ram_.data(); |
| 38 |
ramSize = narrow<unsigned>(ram_.size()); |
| 39 |
} |
| 40 |
|
| 41 |
std::span<const uint8_t, 0x2000> PanasonicMemory::getRomBlock(unsigned block) const |
| 42 |
{ |
| 43 |
if (!rom) { |
| 44 |
throw MSXException("Missing PanasonicRom."); |
| 45 |
} |
| 46 |
if (dram && |
| 47 |
(((0x28 <= block) && (block < 0x2C)) || |
| 48 |
((0x38 <= block) && (block < 0x3C)))) { |
| 49 |
assert(ram); |
| 50 |
unsigned offset = (block & 0x03) * 0x2000; |
| 51 |
unsigned ramOffset = (block < 0x30) ? ramSize - 0x10000 : |
| 52 |
ramSize - 0x08000; |
| 53 |
return std::span<const uint8_t, 0x2000>{ram + ramOffset + offset, 0x2000}; |
| 54 |
} else { |
| 55 |
unsigned offset = block * 0x2000; |
| 56 |
if (offset >= rom->size()) { |
| 57 |
offset &= narrow<unsigned>(rom->size() - 1); |
| 58 |
} |
| 59 |
return subspan<0x2000>(*rom, offset); |
| 60 |
} |
| 61 |
} |
| 62 |
|
| 63 |
std::span<const uint8_t> PanasonicMemory::getRomRange(unsigned first, unsigned last) const |
| 64 |
{ |
| 65 |
if (!rom) { |
| 66 |
throw MSXException("Missing PanasonicRom."); |
| 67 |
} |
| 68 |
if (last < first) { |
| 69 |
throw MSXException("Error in config file: firstblock must " |
| 70 |
"be smaller than lastblock"); |
| 71 |
} |
| 72 |
unsigned start = first * 0x2000; |
| 73 |
if (start >= rom->size()) { |
| 74 |
throw MSXException("Error in config file: firstblock lies " |
| 75 |
"outside of rom image."); |
| 76 |
} |
| 77 |
unsigned stop = (last + 1) * 0x2000; |
| 78 |
if (stop > rom->size()) { |
| 79 |
throw MSXException("Error in config file: lastblock lies " |
| 80 |
"outside of rom image."); |
| 81 |
} |
| 82 |
return subspan(*rom, start, stop - start); |
| 83 |
} |
| 84 |
|
| 85 |
uint8_t* PanasonicMemory::getRamBlock(unsigned block) |
| 86 |
{ |
| 87 |
if (!ram) return nullptr; |
| 88 |
|
| 89 |
unsigned offset = block * 0x2000; |
| 90 |
if (offset >= ramSize) { |
| 91 |
offset &= ramSize - 1; |
| 92 |
} |
| 93 |
return ram + offset; |
| 94 |
} |
| 95 |
|
| 96 |
void PanasonicMemory::setDRAM(bool dram_) |
| 97 |
{ |
| 98 |
if (dram_ != dram) { |
| 99 |
dram = dram_; |
| 100 |
msxcpu.invalidateAllSlotsRWCache(0x0000, 0x10000); |
| 101 |
} |
| 102 |
} |
| 103 |
|
| 104 |
bool PanasonicMemory::isWritable(unsigned address) const |
| 105 |
{ |
| 106 |
return !dram || (address < (ramSize - 0x10000)); |
| 107 |
} |
| 108 |
|
| 109 |
} |