mirror of
https://github.com/tjboldt/Apple2-IO-RPi.git
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105 lines
2.1 KiB
Go
105 lines
2.1 KiB
Go
// Copyright Terence J. Boldt (c)2020-2023
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// Use of this source code is governed by an MIT
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// license that can be found in the LICENSE file.
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// This file is used for handling ProDOS image block reading and writing
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package handlers
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import (
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"fmt"
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"github.com/tjboldt/ProDOS-Utilities/prodos"
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)
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// ReadBlockCommand handles requests to read ProDOS blocks
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func ReadBlockCommand(drive1 prodos.ReaderWriterAt, drive2 prodos.ReaderWriterAt) (int, error) {
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blockLow, _ := comm.ReadByte()
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blockHigh, _ := comm.ReadByte()
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var driveUnit byte
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var err error
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driveUnit, err = comm.ReadByte()
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if err != nil {
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fmt.Printf("Failed to read block")
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return 0, err
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}
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file := drive1
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driveNumber := 1
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if driveUnit >= 128 {
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file = drive2
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driveNumber = 2
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}
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slotNumber := driveUnit & 0x7F >> 4
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block := int(blockHigh)*256 + int(blockLow)
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fmt.Printf("Read block %04X in slot %d, drive %d...", block, slotNumber, driveNumber)
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buffer, err := prodos.ReadBlock(file, block)
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if err != nil {
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fmt.Printf("failed %s\n", err)
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return 0, err
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}
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err = comm.WriteBlock(buffer)
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if err == nil {
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fmt.Printf("succeeded\n")
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} else {
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fmt.Printf("failed %s\n", err)
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}
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return block, nil
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}
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// WriteBlockCommand handles requests to write ProDOS blocks
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func WriteBlockCommand(drive1 prodos.ReaderWriterAt, drive2 prodos.ReaderWriterAt) error {
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blockLow, _ := comm.ReadByte()
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blockHigh, _ := comm.ReadByte()
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var driveUnit byte
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var err error
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driveUnit, err = comm.ReadByte()
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if err != nil {
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fmt.Printf("Failed to write block")
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return err
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}
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file := drive1
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driveNumber := 1
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if driveUnit >= 128 {
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file = drive2
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driveNumber = 2
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}
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buffer := make([]byte, 512)
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block := int(blockHigh)*256 + int(blockLow)
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slotNumber := driveUnit & 0x7F >> 4
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fmt.Printf("Write block %04X in slot %d, drive %d...", block, slotNumber, driveNumber)
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err = comm.ReadBlock(buffer)
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if err != nil {
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fmt.Printf("failed %s\n", err)
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return err
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}
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fmt.Printf("...")
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err = prodos.WriteBlock(file, block, buffer)
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if err == nil {
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fmt.Printf("succeeded\n")
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} else {
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fmt.Printf("failed\n")
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}
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return nil
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}
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