izapple2/diskette.go
2020-10-03 23:38:26 +02:00

52 lines
913 B
Go

package izapple2
import (
"errors"
)
type diskette interface {
powerOn(cycle uint64)
powerOff(cycle uint64)
read(quarterTrack int, cycle uint64) uint8
write(quarterTrack int, value uint8, cycle uint64)
}
func isDiskette(filename string) bool {
data, err := loadResource(filename)
if err != nil {
return false
}
return isFileNib(data) || isFileDsk(data) || isFileWoz(data)
}
func loadDiskette(filename string) (diskette, error) {
data, err := loadResource(filename)
if err != nil {
return nil, err
}
if isFileNib(data) {
var d diskette16sector
d.nib = newFileNib(data)
return &d, nil
}
if isFileDsk(data) {
var d diskette16sectorWritable
d.nib = newFileDsk(data, filename)
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")
}