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Annotation of nono/vm/areaset.cpp, revision 1.1.1.4

1.1       root        1: //
                      2: // nono
1.1.1.2   root        3: // Copyright (C) 2020 nono project
                      4: // Licensed under nono-license.txt
1.1       root        5: //
                      6: 
                      7: #include "areaset.h"
1.1.1.3   root        8: #include "mpu.h"
1.1       root        9: 
1.1.1.4 ! root       10: std::unique_ptr<AreaSetDevice> gAreaSet;
        !            11: 
1.1       root       12: AreaSetDevice::AreaSetDevice()
                     13: {
                     14:        logname = "area";
                     15:        devname = "AreaSet";
                     16:        devaddr = baseaddr;
                     17:        devlen  = 0x2000;
                     18: }
                     19: 
                     20: AreaSetDevice::~AreaSetDevice()
                     21: {
                     22: }
                     23: 
1.1.1.3   root       24: void
                     25: AreaSetDevice::ResetHard()
                     26: {
                     27:        limit = 0;
                     28: }
                     29: 
1.1       root       30: uint64
                     31: AreaSetDevice::Read8(uint32 addr)
                     32: {
                     33:        switch (addr) {
                     34:         case 0xe86001:
                     35:                return limit;
                     36:        }
                     37:        return (uint64)-1;
                     38: }
                     39: 
                     40: uint64
                     41: AreaSetDevice::Read16(uint32 addr)
                     42: {
                     43:        return 0xff00 | Read8(addr + 1);
                     44: }
                     45: 
                     46: uint64
                     47: AreaSetDevice::Write8(uint32 addr, uint32 data)
                     48: {
1.1.1.3   root       49:        gMPU->AddCycle(7);      // InsideOut p.135
                     50: 
1.1       root       51:        switch (addr) {
                     52:         case 0xe86001:
                     53:                putlog(0, "未実装エリアセット書き込み $%02x", data);
                     54:                limit = data;
                     55:                return 0;
                     56:         default:
                     57:                break;
                     58:        }
                     59:        return (uint64)-1;
                     60: }
                     61: 
                     62: uint64
                     63: AreaSetDevice::Write16(uint32 addr, uint32 data)
                     64: {
                     65:        return Write8(addr + 1, data);
                     66: }
                     67: 
                     68: uint64
                     69: AreaSetDevice::Peek8(uint32 addr)
                     70: {
                     71:        switch (addr) {
                     72:         case 0xe86001:
                     73:                return limit;
                     74:         default:
                     75:                return 0xff;
                     76:        }
                     77: }

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