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z80.h
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z80.h
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// The MIT License (MIT)
// Copyright (c) 2019 Erturk Kocalar, http://8Bitforce.com/
// Copyright (c) 2019 Steve Kemp, https://steve.kemp.fi/
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
/*
* This class abstracts the usage of the retroshield to drive a Z80.
*
* The intention is that you can instantiate an instance of this class
* and ensure it operates but keep the details of RAM & I/O inside your
* main-sketch.
*
* You provide a callback to be invoked when RAM is read/written, and
* they are missing you'll end up with a free-running system.
*
*/
#ifndef _Z80_DRIVER
#define _Z80_DRIVER 1
/*
* Signatures for our callback functions.
*
*/
typedef char (*memoryRead)(int address);
typedef void (*memoryWrite)(int address, char byte);
typedef char (*ioread)(int address);
typedef void (*iowrite)(int address, char byte);
class Z80
{
public:
// constructor & destructor
Z80();
~Z80();
// reset
void Reset();
// run a single cycle
void Tick();
// set callbacks
void set_ram_read(memoryRead cb)
{
m_on_memory_read = cb;
};
void set_ram_write(memoryWrite cb)
{
m_on_memory_write = cb;
};
void set_io_read(ioread cb)
{
m_on_io_read = cb;
};
void set_io_write(iowrite cb)
{
m_on_io_write = cb;
};
private:
// pointers to callback functions
memoryRead m_on_memory_read;
memoryWrite m_on_memory_write;
ioread m_on_io_read;
iowrite m_on_io_write;
};
#endif /* _Z80_DRIVER */