mirror of
https://github.com/JetSetIlly/Gopher2600.git
synced 2025-04-02 11:02:17 -04:00
d55a14fded
implemented "borrow" mechanism instead of iteration mechanism which was clumsy and confusing. simplitied how breakpoints are queried by the lazy system, for the benefit of the disassembly window tweaked how emulation state is tracked by the disassembly window removed linter package. unused and underdeveloped. will reimplement in the future.
126 lines
3.4 KiB
Go
126 lines
3.4 KiB
Go
// This file is part of Gopher2600.
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//
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// Gopher2600 is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Gopher2600 is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Gopher2600. If not, see <https://www.gnu.org/licenses/>.
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package disassembly
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import (
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"fmt"
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"github.com/jetsetilly/gopher2600/hardware/memory/memorymap"
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"github.com/jetsetilly/gopher2600/prefs"
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"github.com/jetsetilly/gopher2600/resources"
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)
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type Preferences struct {
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dsm *Disassembly
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dsk *prefs.Disk
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// whether to apply the high mirror bits to the displayed address
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FxxxMirror prefs.Bool
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Symbols prefs.Bool
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// the lowest value to use when formatting address values. changed by the
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// preferences system
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mirrorOrigin uint16
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}
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func (p *Preferences) String() string {
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return p.dsk.String()
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}
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// newPreferences is the preferred method of initialisation for the Preferences type.
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func newPreferences(dsm *Disassembly) (*Preferences, error) {
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p := &Preferences{dsm: dsm}
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p.FxxxMirror.SetHookPost(func(v prefs.Value) error {
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if v.(bool) {
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p.mirrorOrigin = memorymap.OriginCartFxxxMirror
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} else {
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p.mirrorOrigin = memorymap.OriginCart
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}
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dsm.setCartMirror()
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return nil
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})
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p.SetDefaults()
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pth, err := resources.JoinPath(prefs.DefaultPrefsFile)
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if err != nil {
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return nil, err
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}
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p.dsk, err = prefs.NewDisk(pth)
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if err != nil {
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return nil, err
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}
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err = p.dsk.Add("disassembly.fxxxMirror", &p.FxxxMirror)
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if err != nil {
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return nil, err
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}
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err = p.dsk.Add("disassembly.symbols", &p.Symbols)
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if err != nil {
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return nil, err
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}
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err = p.dsk.Load(true)
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if err != nil {
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return nil, err
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}
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return p, nil
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}
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// SetDefaults reverts all settings to default values.
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func (p *Preferences) SetDefaults() {
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p.FxxxMirror.Set(true)
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p.Symbols.Set(true)
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p.mirrorOrigin = memorymap.OriginCartFxxxMirror
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}
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// Load disassembly preferences and apply to the current disassembly.
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func (p *Preferences) Load() error {
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return p.dsk.Load(false)
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}
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// Save current disassembly preferences to disk.
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func (p *Preferences) Save() error {
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return p.dsk.Save()
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}
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// setCartMirror sets the mirror bits to the user's preference. called by the
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// FxxxMirror callback.
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func (dsm *Disassembly) setCartMirror() {
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dsm.crit.Lock()
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defer dsm.crit.Unlock()
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for b := range dsm.disasmEntries.Entries {
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for _, e := range dsm.disasmEntries.Entries[b] {
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// mask off bits that indicate the cartridge/segment origin and reset
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// them with the chosen origin
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a := e.Result.Address&memorymap.CartridgeBits | dsm.Prefs.mirrorOrigin
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e.Address = fmt.Sprintf("$%04x", a)
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// branch instructions need special handling because for readability we
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// translate the offset to an absolute address, which has changed.
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if e.Result.Defn.IsBranch() {
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// mask off bits that indicate the cartridge/segment origin and reset
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// them with the chosen origin
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a := e.Result.Address&memorymap.CartridgeBits | dsm.Prefs.mirrorOrigin
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e.Operand.nonSymbolic = fmt.Sprintf("$%04x", absoluteBranchDestination(a, e.Result.InstructionData))
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}
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}
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}
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}
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