Apple-2-HW
/
Apple2-IO-RPi
mirror of https://github.com/tjboldt/Apple2-IO-RPi.git
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Refactor Go code into packages

This commit is contained in:
Terence Boldt 2021-05-30 07:18:39 -04:00
parent 75c953052f
commit cc560b972f
15 changed files with 538 additions and 521 deletions
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2
.gitignore vendored
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@ -1,4 +1,4 @@
*-bak
*.o
*.DS_Store
RaspberryPi/Apple2-IO-RPi
RaspberryPi/apple2driver/apple2driver

6
README.md
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@ -33,11 +33,11 @@ So far, this is a project and not a finished product. The current prototype is o
10. Update firmware with utility (not written yet) or use EPROM programmer
11. sudo apt install git golang
12. git clone https://github.com/tjboldt/Apple2-IO-RPi.git
13. cd Apple2-IO-RPi
13. cd Apple2-IO-RPi/RaspberryPi/apple2driver
14. go get
15. go build
16. ./Apple2-IO-RPi Apple2-IO-RPi.hdv
18. Setup the Driver as a service or to autostart via cronjob (crontab -e then add the line @reboot /home/pi/Apple2-IO-RPi/RaspberryPi/Apple2-IO-RPi /home/pi/Apple2-IO-RPi/RaspberryPi/Apple2-IO-RPi.hdv > /home/pi/Apple2-IO-RPi/RaspberryPi/Apple2-IO-RPi.log)
16. ./apple2driver ../Apple2-IO-RPi.hdv
18. Setup the Driver as a service or to autostart via cronjob (crontab -e then add the line @reboot /home/pi/Apple2-IO-RPi/RaspberryPi/apple2driver/apple2driver /home/pi/Apple2-IO-RPi/RaspberryPi/Apple2-IO-RPi.hdv > /home/pi/Apple2-IO-RPi/RaspberryPi/Apple2-IO-RPi.log)
## Similar Project
If you prefer having Apple II peripherals control a Raspberry Pi rather than simply using the Raspberry Pi to provide storage, network access and processing to the Apple II, have a look at David Schmenk's excellent [Apple2Pi](https://github.com/dschmenk/apple2pi) project.

510
RaspberryPi/Driver.go
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@ -1,510 +0,0 @@
package main
import (
"bytes"
"errors"
"fmt"
"os"
"os/exec"
"periph.io/x/periph/conn/gpio"
"periph.io/x/periph/conn/gpio/gpioreg"
"periph.io/x/periph/host"
"strings"
"time"
)
var edgeTimeout time.Duration
var out_write gpio.PinIO
var out_read gpio.PinIO
var out_reserved2 gpio.PinIO
var out_reserved1 gpio.PinIO
var out_bit7 gpio.PinIO
var out_bit6 gpio.PinIO
var out_bit5 gpio.PinIO
var out_bit4 gpio.PinIO
var out_bit3 gpio.PinIO
var out_bit2 gpio.PinIO
var out_bit1 gpio.PinIO
var out_bit0 gpio.PinIO
var in_write gpio.PinIO
var in_read gpio.PinIO
var in_reserved2 gpio.PinIO
var in_reserved1 gpio.PinIO
var in_bit7 gpio.PinIO
var in_bit6 gpio.PinIO
var in_bit5 gpio.PinIO
var in_bit4 gpio.PinIO
var in_bit3 gpio.PinIO
var in_bit2 gpio.PinIO
var in_bit1 gpio.PinIO
var in_bit0 gpio.PinIO
const ReadBlockCommand = 1
const WriteBlockCommand = 2
const GetTimeCommand = 3
const ChangeDriveCommand = 4
const ExecCommand = 5
const LoadFileCommand = 6
const SaveFileCommand = 7
var debug bool = false
var workingDirectory string = "/home"
func main() {
host.Init()
initGpio()
if len(os.Args) == 3 && os.Args[2] == "--debug" {
debug = true
}
fmt.Printf("Starting Apple II RPi...\n")
fileName := os.Args[1]
file, err := os.OpenFile(fileName, os.O_RDWR, 0755)
if err != nil {
fmt.Printf("ERROR: %s", err.Error())
os.Exit(1)
}
for {
if debug {
fmt.Printf("Check for command\n")
}
command, err := readByte()
if err != nil {
//fmt.Printf("Timed out waiting for command\n")
} else {
switch command {
case ReadBlockCommand:
handleReadBlockCommand(file)
case WriteBlockCommand:
handleWriteBlockCommand(file)
case GetTimeCommand:
handleGetTimeCommand()
case ExecCommand:
handleExecCommand()
case LoadFileCommand:
handleLoadFileCommand()
}
}
}
}
func handleReadBlockCommand(file *os.File) {
blockLow, _ := readByte()
blockHigh, _ := readByte()
buffer := make([]byte, 512)
var block int64
block = int64(blockHigh)*256 + int64(blockLow)
fmt.Printf("Read block %d\n", block)
file.ReadAt(buffer, int64(block)*512)
//dumpBlock(buffer)
err := readBlock(buffer)
if err == nil {
fmt.Printf("Read block completed\n")
} else {
fmt.Printf("Failed to read block\n")
}
}
func handleWriteBlockCommand(file *os.File) {
blockLow, _ := readByte()
blockHigh, _ := readByte()
buffer := make([]byte, 512)
var block int64
block = int64(blockHigh)*256 + int64(blockLow)
fmt.Printf("Write block %d\n", block)
writeBlock(buffer)
file.WriteAt(buffer, int64(block)*512)
file.Sync()
fmt.Printf("Write block completed\n")
}
func handleExecCommand() {
fmt.Printf("Reading command to execute...\n")
linuxCommand, err := readString()
fmt.Printf("Command to run: %s\n", linuxCommand)
if strings.HasPrefix(linuxCommand, "cd /") {
workingDirectory = strings.Replace(linuxCommand, "cd ", "", 1)
writeString("Working directory set")
return
}
if strings.HasPrefix(linuxCommand, "cd ") {
workingDirectory = workingDirectory + "/" + strings.Replace(linuxCommand, "cd ", "", 1)
writeString("Working directory set")
return
}
if linuxCommand == "a2help" {
writeString("\r" +
"This is a pseudo shell. Each command is executed as a process. The cd command\r" +
"is intercepted and sets the working directory for the next command. Running\r" +
"commands that do not exit will hang. For example, do not use ping without a\r" +
"way to limit output like -c 1.\r\r")
return
}
cmd := exec.Command("bash", "-c", linuxCommand)
cmd.Dir = workingDirectory
cmdOut, err := cmd.Output()
if err != nil {
fmt.Printf("Failed to execute command\n")
writeString("Failed to execute command")
return
}
fmt.Printf("Command output: %s\n", cmdOut)
apple2string := strings.Replace(string(cmdOut), "\n", "\r", -1)
err = writeString(apple2string)
if err != nil {
fmt.Printf("Failed to send command output\n")
return
}
}
func handleGetTimeCommand() {
fmt.Printf("Sending date/time...\n")
/* 49041 ($BF91) 49040 ($BF90)
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
DATE: | year | month | day |
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
TIME: | hour | | minute |
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
49043 ($BF93) 49042 ($BF92)
*/
now := time.Now()
year := now.Year() % 100
month := now.Month()
day := now.Day()
hour := now.Hour()
minute := now.Minute()
bf91 := (byte(year) << 1) + (byte(month) >> 3)
bf90 := ((byte(month) & 15) << 5) + byte(day)
bf93 := byte(hour)
bf92 := byte(minute)
writeByte(bf90)
writeByte(bf91)
writeByte(bf92)
writeByte(bf93)
fmt.Printf("Send time complete\n")
}
func handleLoadFileCommand() {
fileName, _ := readString()
file, err := os.OpenFile(fileName, os.O_RDWR, 0755)
if err != nil {
fmt.Printf("ERROR: %s\n", err.Error())
writeByte(0)
writeByte(0)
return
}
fileInfo, _ := file.Stat()
fileSize := int(fileInfo.Size())
fmt.Printf("FileSize: %d\n", fileSize)
fileSizeHigh := byte(fileSize >> 8)
fileSizeLow := byte(fileSize & 255)
writeByte(fileSizeLow)
writeByte(fileSizeHigh)
buffer := make([]byte, fileSize)
fmt.Printf("Read file %s SizeHigh: %d SizeLow: %d\n", fileName, fileSizeHigh, fileSizeLow)
file.Read(buffer)
for i := 0; i < fileSize; i++ {
err := writeByte(buffer[i])
if err != nil {
return
}
}
}
func readBlock(buffer []byte) error {
for i := 0; i < 512; i++ {
err := writeByte(buffer[i])
if err != nil {
return err
}
}
return nil
}
func writeBlock(buffer []byte) error {
var err error
for i := 0; i < 512; i++ {
buffer[i], err = readByte()
if err != nil {
return err
}
}
return nil
}
func initGpio() {
out_write = gpioreg.ByName("GPIO24")
out_read = gpioreg.ByName("GPIO25")
out_reserved2 = gpioreg.ByName("GPIO7") //note GPIO7 and CPIO8 require extra effort to use
out_reserved1 = gpioreg.ByName("GPIO8")
out_bit7 = gpioreg.ByName("GPIO5")
out_bit6 = gpioreg.ByName("GPIO11")
out_bit5 = gpioreg.ByName("GPIO9")
out_bit4 = gpioreg.ByName("GPIO10")
out_bit3 = gpioreg.ByName("GPIO22")
out_bit2 = gpioreg.ByName("GPIO27")
out_bit1 = gpioreg.ByName("GPIO17")
out_bit0 = gpioreg.ByName("GPIO4")
in_write = gpioreg.ByName("GPIO23")
in_read = gpioreg.ByName("GPIO18")
in_reserved2 = gpioreg.ByName("GPIO14")
in_reserved1 = gpioreg.ByName("GPIO15")
in_bit7 = gpioreg.ByName("GPIO12")
in_bit6 = gpioreg.ByName("GPIO16")
in_bit5 = gpioreg.ByName("GPIO20")
in_bit4 = gpioreg.ByName("GPIO21")
in_bit3 = gpioreg.ByName("GPIO26")
in_bit2 = gpioreg.ByName("GPIO19")
in_bit1 = gpioreg.ByName("GPIO13")
in_bit0 = gpioreg.ByName("GPIO6")
in_write.In(gpio.PullDown, gpio.BothEdges)
in_read.In(gpio.PullDown, gpio.BothEdges)
out_reserved1.Out(gpio.High)
out_reserved2.Out(gpio.High)
out_read.Out(gpio.High)
out_write.Out(gpio.High)
out_bit7.Out(gpio.Low)
out_bit6.Out(gpio.Low)
out_bit5.Out(gpio.Low)
out_bit4.Out(gpio.Low)
out_bit3.Out(gpio.Low)
out_bit2.Out(gpio.Low)
out_bit1.Out(gpio.Low)
out_bit0.Out(gpio.Low)
edgeTimeout = time.Second * 5
}
func dumpBlock(buffer []byte) {
for i := 0; i < 512; i++ {
fmt.Printf("%02X ", buffer[i])
}
}
func readString() (string, error) {
var inBytes bytes.Buffer
for {
inByte, err := readByte()
if err != nil {
return "", err
}
if inByte == 0 {
break
}
inBytes.WriteByte(inByte)
}
return string(inBytes.Bytes()), nil
}
func writeString(outString string) error {
for _, character := range outString {
err := writeByte(byte(character) | 128)
if err != nil {
fmt.Printf("Failed to write string\n")
return err
}
}
writeByte(0)
return nil
}
func readByte() (byte, error) {
// let the Apple II know we are ready to read
if debug {
fmt.Printf("let the Apple II know we are ready to read\n")
}
out_read.Out(gpio.Low)
// wait for the Apple II to write
if debug {
fmt.Printf("wait for the Apple II to write\n")
}
for in_write.Read() == gpio.High {
if !in_write.WaitForEdge(edgeTimeout) {
if debug {
fmt.Printf("Timed out reading byte -- write stuck high\n")
}
return 0, errors.New("Timed out reading byte -- write stuck high\n")
}
}
// get a nibble of data
if debug {
fmt.Printf("get a byte of data\n")
}
var data byte
data = 0
bit7 := in_bit7.Read()
bit6 := in_bit6.Read()
bit5 := in_bit5.Read()
bit4 := in_bit4.Read()
bit3 := in_bit3.Read()
bit2 := in_bit2.Read()
bit1 := in_bit1.Read()
bit0 := in_bit0.Read()
if bit7 == gpio.High {
data += 128
}
if bit6 == gpio.High {
data += 64
}
if bit5 == gpio.High {
data += 32
}
if bit4 == gpio.High {
data += 16
}
if bit3 == gpio.High {
data += 8
}
if bit2 == gpio.High {
data += 4
}
if bit1 == gpio.High {
data += 2
}
if bit0 == gpio.High {
data += 1
}
// let the Apple II know we are done reading
//fmt.Printf("let the Apple II know we are done reading\n")
out_read.Out(gpio.High)
// wait for the Apple II to finish writing
//fmt.Printf("wait for the Apple II to finish writing\n")
for in_write.Read() == gpio.Low {
if !in_write.WaitForEdge(edgeTimeout) {
if debug {
fmt.Printf("Timed out reading byte -- write stuck low\n")
}
return 0, errors.New("Timed out reading byte -- write stuck low")
}
}
return data, nil
}
func writeByte(data byte) error {
// wait for the Apple II to be ready to read
if debug {
fmt.Printf("wait for the Apple II to be ready to read\n")
}
for in_read.Read() == gpio.High {
if !in_read.WaitForEdge(edgeTimeout) {
if debug {
fmt.Printf("Timed out writing byte -- read stuck high\n")
}
return errors.New("Timed out writing byte -- read stuck high")
}
}
bit7 := gpio.Low
bit6 := gpio.Low
bit5 := gpio.Low
bit4 := gpio.Low
bit3 := gpio.Low
bit2 := gpio.Low
bit1 := gpio.Low
bit0 := gpio.Low
if ((data & 128) >> 7) == 1 {
bit7 = gpio.High
}
out_bit7.Out(bit7)
if ((data & 64) >> 6) == 1 {
bit6 = gpio.High
}
out_bit6.Out(bit6)
if ((data & 32) >> 5) == 1 {
bit5 = gpio.High
}
out_bit5.Out(bit5)
if ((data & 16) >> 4) == 1 {
bit4 = gpio.High
}
out_bit4.Out(bit4)
if ((data & 8) >> 3) == 1 {
bit3 = gpio.High
}
out_bit3.Out(bit3)
if ((data & 4) >> 2) == 1 {
bit2 = gpio.High
}
out_bit2.Out(bit2)
if ((data & 2) >> 1) == 1 {
bit1 = gpio.High
}
out_bit1.Out(bit1)
if (data & 1) == 1 {
bit0 = gpio.High
}
out_bit0.Out(bit0)
// let Apple II know we're writing
if debug {
fmt.Printf("let Apple II know we're writing\n")
}
out_write.Out(gpio.Low)
// wait for the Apple II to finsih reading
//fmt.Printf("wait for the Apple II to finsih reading\n")
for in_read.Read() == gpio.Low {
if !in_read.WaitForEdge(edgeTimeout) {
if debug {
fmt.Printf("Timed out writing byte -- read stuck low\n")
}
return errors.New("Timed out writing byte -- read stuck low")
}
}
// let the Apple II know we are done writing
if debug {
fmt.Printf("let the Apple II know we are done writing\n")
}
out_write.Out(gpio.High)
return nil
}

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RaspberryPi/apple2driver/a2io/communication.go Normal file
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package a2io
import (
"bytes"
"errors"
"fmt"
"time"
"periph.io/x/periph/conn/gpio"
"periph.io/x/periph/conn/gpio/gpioreg"
"periph.io/x/periph/host"
)
var edgeTimeout time.Duration
var out_write gpio.PinIO
var out_read gpio.PinIO
var out_reserved2 gpio.PinIO
var out_reserved1 gpio.PinIO
var out_bit7 gpio.PinIO
var out_bit6 gpio.PinIO
var out_bit5 gpio.PinIO
var out_bit4 gpio.PinIO
var out_bit3 gpio.PinIO
var out_bit2 gpio.PinIO
var out_bit1 gpio.PinIO
var out_bit0 gpio.PinIO
var in_write gpio.PinIO
var in_read gpio.PinIO
var in_reserved2 gpio.PinIO
var in_reserved1 gpio.PinIO
var in_bit7 gpio.PinIO
var in_bit6 gpio.PinIO
var in_bit5 gpio.PinIO
var in_bit4 gpio.PinIO
var in_bit3 gpio.PinIO
var in_bit2 gpio.PinIO
var in_bit1 gpio.PinIO
var in_bit0 gpio.PinIO
func InitGpio() {
host.Init()
out_write = gpioreg.ByName("GPIO24")
out_read = gpioreg.ByName("GPIO25")
out_reserved2 = gpioreg.ByName("GPIO7") //note GPIO7 and CPIO8 require extra effort to use
out_reserved1 = gpioreg.ByName("GPIO8")
out_bit7 = gpioreg.ByName("GPIO5")
out_bit6 = gpioreg.ByName("GPIO11")
out_bit5 = gpioreg.ByName("GPIO9")
out_bit4 = gpioreg.ByName("GPIO10")
out_bit3 = gpioreg.ByName("GPIO22")
out_bit2 = gpioreg.ByName("GPIO27")
out_bit1 = gpioreg.ByName("GPIO17")
out_bit0 = gpioreg.ByName("GPIO4")
in_write = gpioreg.ByName("GPIO23")
in_read = gpioreg.ByName("GPIO18")
in_reserved2 = gpioreg.ByName("GPIO14")
in_reserved1 = gpioreg.ByName("GPIO15")
in_bit7 = gpioreg.ByName("GPIO12")
in_bit6 = gpioreg.ByName("GPIO16")
in_bit5 = gpioreg.ByName("GPIO20")
in_bit4 = gpioreg.ByName("GPIO21")
in_bit3 = gpioreg.ByName("GPIO26")
in_bit2 = gpioreg.ByName("GPIO19")
in_bit1 = gpioreg.ByName("GPIO13")
in_bit0 = gpioreg.ByName("GPIO6")
in_write.In(gpio.PullDown, gpio.BothEdges)
in_read.In(gpio.PullDown, gpio.BothEdges)
out_reserved1.Out(gpio.High)
out_reserved2.Out(gpio.High)
out_read.Out(gpio.High)
out_write.Out(gpio.High)
out_bit7.Out(gpio.Low)
out_bit6.Out(gpio.Low)
out_bit5.Out(gpio.Low)
out_bit4.Out(gpio.Low)
out_bit3.Out(gpio.Low)
out_bit2.Out(gpio.Low)
out_bit1.Out(gpio.Low)
out_bit0.Out(gpio.Low)
edgeTimeout = time.Second * 5
}
func ReadString() (string, error) {
var inBytes bytes.Buffer
for {
inByte, err := ReadByte()
if err != nil {
return "", err
}
if inByte == 0 {
break
}
inBytes.WriteByte(inByte)
}
return string(inBytes.Bytes()), nil
}
func WriteString(outString string) error {
for _, character := range outString {
err := WriteByte(byte(character) | 128)
if err != nil {
fmt.Printf("Failed to write string\n")
return err
}
}
WriteByte(0)
return nil
}
func ReadByte() (byte, error) {
// let the Apple II know we are ready to read
out_read.Out(gpio.Low)
// wait for the Apple II to write
for in_write.Read() == gpio.High {
if !in_write.WaitForEdge(edgeTimeout) {
return 0, errors.New("Timed out reading byte -- write stuck high\n")
}
}
// get a nibble of data
var data byte
data = 0
bit7 := in_bit7.Read()
bit6 := in_bit6.Read()
bit5 := in_bit5.Read()
bit4 := in_bit4.Read()
bit3 := in_bit3.Read()
bit2 := in_bit2.Read()
bit1 := in_bit1.Read()
bit0 := in_bit0.Read()
if bit7 == gpio.High {
data += 128
}
if bit6 == gpio.High {
data += 64
}
if bit5 == gpio.High {
data += 32
}
if bit4 == gpio.High {
data += 16
}
if bit3 == gpio.High {
data += 8
}
if bit2 == gpio.High {
data += 4
}
if bit1 == gpio.High {
data += 2
}
if bit0 == gpio.High {
data += 1
}
// let the Apple II know we are done reading
//fmt.Printf("let the Apple II know we are done reading\n")
out_read.Out(gpio.High)
// wait for the Apple II to finish writing
//fmt.Printf("wait for the Apple II to finish writing\n")
for in_write.Read() == gpio.Low {
if !in_write.WaitForEdge(edgeTimeout) {
return 0, errors.New("Timed out reading byte -- write stuck low")
}
}
return data, nil
}
func WriteByte(data byte) error {
// wait for the Apple II to be ready to read
for in_read.Read() == gpio.High {
if !in_read.WaitForEdge(edgeTimeout) {
return errors.New("Timed out writing byte -- read stuck high")
}
}
bit7 := gpio.Low
bit6 := gpio.Low
bit5 := gpio.Low
bit4 := gpio.Low
bit3 := gpio.Low
bit2 := gpio.Low
bit1 := gpio.Low
bit0 := gpio.Low
if ((data & 128) >> 7) == 1 {
bit7 = gpio.High
}
out_bit7.Out(bit7)
if ((data & 64) >> 6) == 1 {
bit6 = gpio.High
}
out_bit6.Out(bit6)
if ((data & 32) >> 5) == 1 {
bit5 = gpio.High
}
out_bit5.Out(bit5)
if ((data & 16) >> 4) == 1 {
bit4 = gpio.High
}
out_bit4.Out(bit4)
if ((data & 8) >> 3) == 1 {
bit3 = gpio.High
}
out_bit3.Out(bit3)
if ((data & 4) >> 2) == 1 {
bit2 = gpio.High
}
out_bit2.Out(bit2)
if ((data & 2) >> 1) == 1 {
bit1 = gpio.High
}
out_bit1.Out(bit1)
if (data & 1) == 1 {
bit0 = gpio.High
}
out_bit0.Out(bit0)
// let Apple II know we're writing
out_write.Out(gpio.Low)
// wait for the Apple II to finsih reading
//fmt.Printf("wait for the Apple II to finsih reading\n")
for in_read.Read() == gpio.Low {
if !in_read.WaitForEdge(edgeTimeout) {
return errors.New("Timed out writing byte -- read stuck low")
}
}
// let the Apple II know we are done writing
out_write.Out(gpio.High)
return nil
}
func WriteBlock(buffer []byte) error {
for i := 0; i < 512; i++ {
err := WriteByte(buffer[i])
if err != nil {
return err
}
}
return nil
}
func ReadBlock(buffer []byte) error {
var err error
for i := 0; i < 512; i++ {
buffer[i], err = ReadByte()
if err != nil {
return err
}
}
return nil
}
func WriteBuffer(buffer []byte) error {
bufferSize := len(buffer)
for i := 0; i < bufferSize; i++ {
err := WriteByte(buffer[i])
if err != nil {
return err
}
}
return nil
}

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RaspberryPi/apple2driver/apple2driver Executable file
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49
RaspberryPi/apple2driver/driver.go Normal file
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package main
import (
"fmt"
"os"
"github.com/tjboldt/Apple2-IO-RPi/RaspberryPi/apple2driver/a2io"
"github.com/tjboldt/Apple2-IO-RPi/RaspberryPi/apple2driver/handlers"
)
const ReadBlockCommand = 1
const WriteBlockCommand = 2
const GetTimeCommand = 3
const ChangeDriveCommand = 4
const ExecCommand = 5
const LoadFileCommand = 6
const SaveFileCommand = 7
func main() {
a2io.InitGpio()
fmt.Printf("Starting Apple II RPi...\n")
fileName := os.Args[1]
file, err := os.OpenFile(fileName, os.O_RDWR, 0755)
if err != nil {
fmt.Printf("ERROR: %s", err.Error())
os.Exit(1)
}
for {
command, err := a2io.ReadByte()
if err == nil {
switch command {
case ReadBlockCommand:
handlers.ReadBlockCommand(file)
case WriteBlockCommand:
handlers.WriteBlockCommand(file)
case GetTimeCommand:
handlers.GetTimeCommand()
case ExecCommand:
handlers.ExecCommand()
case LoadFileCommand:
handlers.LoadFileCommand()
}
}
}
}

5
RaspberryPi/apple2driver/go.mod Normal file
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module github.com/tjboldt/Apple2-IO-RPi/RaspberryPi/apple2driver
go 1.16
require periph.io/x/periph v3.6.8+incompatible

2
RaspberryPi/apple2driver/go.sum Normal file
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periph.io/x/periph v3.6.8+incompatible h1:lki0ie6wHtvlilXhIkabdCUQMpb5QN4Fx33yNQdqnaA=
periph.io/x/periph v3.6.8+incompatible/go.mod h1:EWr+FCIU2dBWz5/wSWeiIUJTriYv9v2j2ENBmgYyy7Y=

60
RaspberryPi/apple2driver/handlers/exec.go Normal file
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package handlers
import (
"fmt"
"os"
"os/exec"
"strings"
"github.com/tjboldt/Apple2-IO-RPi/RaspberryPi/apple2driver/a2io"
)
func ExecCommand() {
workingDirectory, err := os.Getwd()
if err != nil {
workingDirectory = "/home"
a2io.WriteString("Failed to get current working directory, setting to /home\r")
}
fmt.Printf("Reading command to execute...\n")
linuxCommand, err := a2io.ReadString()
fmt.Printf("Command to run: %s\n", linuxCommand)
if strings.HasPrefix(linuxCommand, "cd ") {
workingDirectory = strings.Replace(linuxCommand, "cd ", "", 1)
err = os.Chdir(workingDirectory)
if err != nil {
a2io.WriteString("Failed to set working directory\r")
return
}
a2io.WriteString("Working directory set\r")
return
}
if linuxCommand == "a2help" {
a2io.WriteString("\r" +
"This is a pseudo shell. Each command is executed as a process. The cd command\r" +
"is intercepted and sets the working directory for the next command. Running\r" +
"commands that do not exit will hang. For example, do not use ping without a\r" +
"way to limit output like -c 1.\r" +
"\r" +
"Built-in commands:\r" +
"a2help - display this message\r" +
"a2wifi - set up wifi\r" +
"\r")
return
}
cmd := exec.Command("bash", "-c", linuxCommand)
cmd.Dir = workingDirectory
cmdOut, err := cmd.Output()
if err != nil {
fmt.Printf("Failed to execute command\n")
a2io.WriteString("Failed to execute command\r")
return
}
fmt.Printf("Command output: %s\n", cmdOut)
apple2string := strings.Replace(string(cmdOut), "\n", "\r", -1)
err = a2io.WriteString(apple2string)
if err != nil {
fmt.Printf("Failed to send command output\n")
return
}
}

44
RaspberryPi/apple2driver/handlers/getTime.go Normal file
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package handlers
import (
"fmt"
"time"
"github.com/tjboldt/Apple2-IO-RPi/RaspberryPi/apple2driver/a2io"
)
func GetTimeCommand() {
fmt.Printf("Sending date/time...\n")
/* 49041 ($BF91) 49040 ($BF90)
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
DATE: | year | month | day |
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
TIME: | hour | | minute |
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
49043 ($BF93) 49042 ($BF92)
*/
now := time.Now()
year := now.Year() % 100
month := now.Month()
day := now.Day()
hour := now.Hour()
minute := now.Minute()
bf91 := (byte(year) << 1) + (byte(month) >> 3)
bf90 := ((byte(month) & 15) << 5) + byte(day)
bf93 := byte(hour)
bf92 := byte(minute)
a2io.WriteByte(bf90)
a2io.WriteByte(bf91)
a2io.WriteByte(bf92)
a2io.WriteByte(bf93)
fmt.Printf("Send time complete\n")
}

39
RaspberryPi/apple2driver/handlers/loadFile.go Normal file
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package handlers
import (
"fmt"
"os"
"github.com/tjboldt/Apple2-IO-RPi/RaspberryPi/apple2driver/a2io"
)
func LoadFileCommand() {
fileName, _ := a2io.ReadString()
file, err := os.OpenFile(fileName, os.O_RDWR, 0755)
if err != nil {
fmt.Printf("ERROR: %s\n", err.Error())
a2io.WriteByte(0)
a2io.WriteByte(0)
return
}
fileInfo, _ := file.Stat()
fileSize := int(fileInfo.Size())
fmt.Printf("FileSize: %d\n", fileSize)
fileSizeHigh := byte(fileSize >> 8)
fileSizeLow := byte(fileSize & 255)
a2io.WriteByte(fileSizeLow)
a2io.WriteByte(fileSizeHigh)
buffer := make([]byte, fileSize)
fmt.Printf("Read file %s SizeHigh: %d SizeLow: %d\n", fileName, fileSizeHigh, fileSizeLow)
file.Read(buffer)
a2io.WriteBuffer(buffer)
}

28
RaspberryPi/apple2driver/handlers/readBlock.go Normal file
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package handlers
import (
"fmt"
"os"
"github.com/tjboldt/Apple2-IO-RPi/RaspberryPi/apple2driver/a2io"
)
func ReadBlockCommand(file *os.File) {
blockLow, _ := a2io.ReadByte()
blockHigh, _ := a2io.ReadByte()
buffer := make([]byte, 512)
var block int64
block = int64(blockHigh)*256 + int64(blockLow)
fmt.Printf("Read block %d\n", block)
file.ReadAt(buffer, int64(block)*512)
err := a2io.WriteBlock(buffer)
if err == nil {
fmt.Printf("Read block completed\n")
} else {
fmt.Printf("Failed to read block\n")
}
}

24
RaspberryPi/apple2driver/handlers/writeBlock.go Normal file
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package handlers
import (
"fmt"
"os"
"github.com/tjboldt/Apple2-IO-RPi/RaspberryPi/apple2driver/a2io"
)
func WriteBlockCommand(file *os.File) {
blockLow, _ := a2io.ReadByte()
blockHigh, _ := a2io.ReadByte()
buffer := make([]byte, 512)
var block int64
block = int64(blockHigh)*256 + int64(blockLow)
fmt.Printf("Write block %d\n", block)
a2io.ReadBlock(buffer)
file.WriteAt(buffer, int64(block)*512)
file.Sync()
fmt.Printf("Write block completed\n")
}

5
RaspberryPi/go.mod
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module github.com/tjboldt/Apple2-IO-RPi
go 1.16
require periph.io/x/periph v3.6.7+incompatible

2
RaspberryPi/go.sum
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@ -1,2 +0,0 @@
periph.io/x/periph v3.6.7+incompatible h1:ZfRdHbcxVekgSJZmxp3873YpxNdWs6wg7waDCF7GB18=
periph.io/x/periph v3.6.7+incompatible/go.mod h1:EWr+FCIU2dBWz5/wSWeiIUJTriYv9v2j2ENBmgYyy7Y=