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Annotation of nono/vm/printer.cpp, revision 1.1.1.7

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: 
1.1.1.6   root        7: //
                      8: // プリンタポート
                      9: //
                     10: 
1.1       root       11: #include "printer.h"
1.1.1.3   root       12: #include "mpu.h"
1.1       root       13: 
1.1.1.6   root       14: // グローバル参照用
                     15: PrinterDevice *gPrinter;
1.1.1.4   root       16: 
1.1.1.6   root       17: // コンストラクタ
1.1       root       18: PrinterDevice::PrinterDevice()
1.1.1.5   root       19:        : inherited("Printer")
1.1       root       20: {
                     21:        devaddr = baseaddr;
                     22:        devlen  = 0x2000;
                     23: }
                     24: 
1.1.1.6   root       25: // デストラクタ
1.1       root       26: PrinterDevice::~PrinterDevice()
                     27: {
1.1.1.6   root       28:        gPrinter = NULL;
1.1       root       29: }
                     30: 
                     31: uint64
                     32: PrinterDevice::Read8(uint32 addr)
                     33: {
                     34:        // 書き込み専用
1.1.1.3   root       35:        gMPU->AddCycle(7);      // InsideOut p.135
1.1       root       36:        return (uint64)-1;
                     37: }
                     38: 
                     39: uint64
                     40: PrinterDevice::Read16(uint32 addr)
                     41: {
                     42:        // 書き込み専用
1.1.1.3   root       43:        gMPU->AddCycle(7);      // InsideOut p.135
1.1       root       44:        return (uint64)-1;
                     45: }
                     46: 
                     47: uint64
                     48: PrinterDevice::Write8(uint32 addr, uint32 data)
                     49: {
1.1.1.3   root       50:        gMPU->AddCycle(7);      // InsideOut p.135
                     51: 
1.1       root       52:        uint32 offset = addr - baseaddr;
                     53:        switch (offset) {
                     54:         case 0:
1.1.1.7 ! root       55:                // データ書き込み
        !            56:                putlog(0, "Write Data (NOT IMPLEMENTED)");
1.1       root       57:                break;
                     58:         case 3:
1.1.1.7 ! root       59:                // ストローブ書き込み
        !            60:                putlog(0, "Write Strobe (NOT IMPLEMENTED)");
1.1       root       61:                return 0;
                     62:         default:
                     63:                break;
                     64:        }
                     65:        return (uint64)-1;
                     66: }
                     67: 
                     68: uint64
                     69: PrinterDevice::Write16(uint32 addr, uint32 data)
                     70: {
                     71:        return Write8(addr + 1, data);
                     72: }
                     73: 
                     74: uint64
                     75: PrinterDevice::Peek8(uint32 addr)
                     76: {
                     77:        // XXX
                     78:        return 0xff;
                     79: }

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