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preferences.go
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preferences.go
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// This file is part of Gopher2600.
//
// Gopher2600 is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Gopher2600 is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Gopher2600. If not, see <https://www.gnu.org/licenses/>.
package preferences
import (
"github.com/jetsetilly/gopher2600/prefs"
"github.com/jetsetilly/gopher2600/resources"
)
// Preferences defines and collates all the preference values used by the emulation.
type Preferences struct {
dsk *prefs.Disk
// initialise hardware to unknown state after reset
RandomState prefs.Bool
// unused pins when reading TIA/RIOT registers take the value of the last
// value on the bus. if RandomPins is true then the values of the unusued
// pins are randomised. this is the equivalent of the Stella option "drive
// unused pins randomly on a read/peek"
RandomPins prefs.Bool
// preferences used by the television
TV *TVPreferences
// preferences used by the ARM sub-system
ARM *ARMPreferences
// preferences used by PlusROM cartridges
PlusROM *PlusROMPreferences
// preferences used by the TIA package in order to emulate different
// revisions of the TIA chip
Revision *RevisionPreferences
// preferences for the AtariVox peripheral
AtariVox *AtariVoxPreferences
}
func (p *Preferences) String() string {
return p.dsk.String()
}
// NewPreferences is the preferred method of initialisation for the Preferences type.
func NewPreferences() (*Preferences, error) {
p := &Preferences{}
p.SetDefaults()
pth, err := resources.JoinPath(prefs.DefaultPrefsFile)
if err != nil {
return nil, err
}
p.dsk, err = prefs.NewDisk(pth)
if err != nil {
return nil, err
}
err = p.dsk.Add("hardware.randState", &p.RandomState)
if err != nil {
return nil, err
}
err = p.dsk.Add("hardware.randPins", &p.RandomPins)
if err != nil {
return nil, err
}
err = p.dsk.Load(true)
if err != nil {
return nil, err
}
p.TV, err = newTVPreferences()
if err != nil {
return nil, err
}
p.ARM, err = newARMprefrences()
if err != nil {
return nil, err
}
p.PlusROM, err = newPlusROMpreferences()
if err != nil {
return nil, err
}
p.Revision, err = newRevisionPreferences()
if err != nil {
return nil, err
}
p.AtariVox, err = newAtariVoxPreferences()
if err != nil {
return nil, err
}
return p, nil
}
// SetDefaults reverts all settings to default values.
func (p *Preferences) SetDefaults() {
// initialise random number generator
p.RandomState.Set(false)
p.RandomPins.Set(false)
}
// Load current hardware preference from disk.
func (p *Preferences) Load() error {
return p.dsk.Load(false)
}
// Save current hardware preferences to disk.
func (p *Preferences) Save() error {
return p.dsk.Save()
}