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processor.go
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processor.go
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/*
Copyright (c) 2019-2021 Andreas T Jonsson
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
package processor
import (
"errors"
"github.com/andreas-jonsson/virtualxt/emulator/memory"
)
var ErrCPUHalt = errors.New("CPU HALT")
type InterruptController interface {
GetInterrupt() (int, error)
IRQ(n int)
}
type Processor interface {
Debug
InByte(port uint16) byte
OutByte(port uint16, data byte)
InWord(port uint16) uint16
OutWord(port uint16, data uint16)
ReadByte(addr memory.Pointer) byte
WriteByte(addr memory.Pointer, data byte)
ReadWord(addr memory.Pointer) uint16
WriteWord(addr memory.Pointer, data uint16)
GetRegisters() *Registers
GetInterruptController() InterruptController
GetMappedMemoryDevice(addr memory.Pointer) memory.Memory
GetMappedIODevice(port uint16) memory.IO
InstallMemoryDevice(device memory.Memory, from, to memory.Pointer) error
InstallMemoryDeviceAt(device memory.Memory, addr ...memory.Pointer) error
InstallIODevice(device memory.IO, from, to uint16) error
InstallIODeviceAt(device memory.IO, port ...uint16) error
}