izapple2/storage/diskette.go
2022-01-28 19:25:52 +01:00

46 lines
1.0 KiB
Go

package storage
import (
"errors"
)
// Diskette represents a diskette and it's RW mechanism
type Diskette interface {
PowerOn(cycle uint64)
PowerOff(cycle uint64)
Read(quarterTrack int, cycle uint64) uint8
Write(quarterTrack int, value uint8, cycle uint64)
}
// IsDiskette returns true if the files looks like a 5 1/4 diskette
func IsDiskette(data []byte) bool {
return isFileNib(data) || isFileDsk(data) || isFileWoz(data)
}
// MakeDiskette returns a Diskette by detecting the format
func MakeDiskette(data []byte, filename string, writeable bool) (Diskette, error) {
if isFileNib(data) {
var d diskette16sector
d.nib = newFileNib(data)
return &d, nil
}
if isFileDsk(data) {
var d diskette16sectorWritable
d.nib = newFileDsk(data, filename)
d.nib.supportsWrite = d.nib.supportsWrite && writeable
return &d, nil
}
if isFileWoz(data) {
f, err := NewFileWoz(data)
if err != nil {
return nil, err
}
return newDisquetteWoz(f)
}
return nil, errors.New("Diskette format not supported")
}