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Annotation of nono/vm/printer.cpp, revision 1.1.1.5

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 "printer.h"
1.1.1.3   root        8: #include "mpu.h"
1.1       root        9: 
1.1.1.4   root       10: std::unique_ptr<PrinterDevice> gPrinter;
                     11: 
1.1       root       12: PrinterDevice::PrinterDevice()
1.1.1.5 ! root       13:        : inherited("Printer")
1.1       root       14: {
                     15:        devaddr = baseaddr;
                     16:        devlen  = 0x2000;
                     17: }
                     18: 
                     19: PrinterDevice::~PrinterDevice()
                     20: {
                     21: }
                     22: 
                     23: uint64
                     24: PrinterDevice::Read8(uint32 addr)
                     25: {
                     26:        // 書き込み専用
1.1.1.3   root       27:        gMPU->AddCycle(7);      // InsideOut p.135
1.1       root       28:        return (uint64)-1;
                     29: }
                     30: 
                     31: uint64
                     32: PrinterDevice::Read16(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::Write8(uint32 addr, uint32 data)
                     41: {
1.1.1.3   root       42:        gMPU->AddCycle(7);      // InsideOut p.135
                     43: 
1.1       root       44:        uint32 offset = addr - baseaddr;
                     45:        switch (offset) {
                     46:         case 0:
                     47:                putlog(0, "未実装データ書き込み");
                     48:                break;
                     49:         case 3:
                     50:                putlog(0, "未実装ストローブ書き込み");
                     51:                return 0;
                     52:         default:
                     53:                break;
                     54:        }
                     55:        return (uint64)-1;
                     56: }
                     57: 
                     58: uint64
                     59: PrinterDevice::Write16(uint32 addr, uint32 data)
                     60: {
                     61:        return Write8(addr + 1, data);
                     62: }
                     63: 
                     64: uint64
                     65: PrinterDevice::Peek8(uint32 addr)
                     66: {
                     67:        // XXX
                     68:        return 0xff;
                     69: }

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