87 lines
1.7 KiB
Go
87 lines
1.7 KiB
Go
// Copyright Terence J. Boldt (c)2020-2021
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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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"os"
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"github.com/tjboldt/ProDOS-Utilities/prodos"
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)
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var oldFirmware = false
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// ReadBlockCommand handles requests to read ProDOS blocks
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func ReadBlockCommand(drive1 *os.File, drive2 *os.File) {
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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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if !oldFirmware {
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driveUnit, err = comm.ReadByte()
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fmt.Printf("Drive unit: %0X\n", driveUnit)
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if err != nil {
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fmt.Printf("Drive unit not sent, assuming older firmware")
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oldFirmware = true
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}
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}
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file := drive1
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if driveUnit >= 128 {
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file = drive2
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}
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block := int(blockHigh)*256 + int(blockLow)
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fmt.Printf("Read block %d\n", block)
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buffer := prodos.ReadBlock(file, block)
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err = comm.WriteBlock(buffer)
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if err == nil {
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fmt.Printf("Read block completed\n")
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} else {
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fmt.Printf("Failed to read block\n")
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}
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}
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// WriteBlockCommand handles requests to write ProDOS blocks
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func WriteBlockCommand(drive1 *os.File, drive2 *os.File) {
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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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if !oldFirmware {
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driveUnit, err = comm.ReadByte()
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if err != nil {
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fmt.Printf("Drive unit not sent, assuming older firmware")
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oldFirmware = true
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}
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}
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file := drive1
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if driveUnit >= 128 {
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file = drive2
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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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fmt.Printf("Write block %d\n", block)
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comm.ReadBlock(buffer)
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prodos.WriteBlock(file, block, buffer)
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fmt.Printf("Write block completed\n")
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}
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