mirror of
https://github.com/zellyn/diskii.git
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130 lines
3.5 KiB
Go
130 lines
3.5 KiB
Go
// Copyright © 2016 Zellyn Hunter <zellyn@gmail.com>
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package cmd
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import (
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"fmt"
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"os"
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"github.com/spf13/cobra"
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"github.com/zellyn/diskii/lib/disk"
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"github.com/zellyn/diskii/lib/supermon"
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)
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// nakedosCmd represents the nakedos command
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var nakedosCmd = &cobra.Command{
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Use: "nakedos",
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Short: "work with NakedOS disks",
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Long: `diskii nakedos contains the subcommands useful for working
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with NakedOS (and Super-Mon) disks`,
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Aliases: []string{"supermon"},
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}
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func init() {
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RootCmd.AddCommand(nakedosCmd)
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}
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// ----- mkhello command ----------------------------------------------------
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var address uint16 // flag for address to load at
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var start uint16 // flag for address to start execution at
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const helloName = "FHELLO" // filename to use (if Super-Mon)
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// mkhelloCmd represents the mkhello command
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var mkhelloCmd = &cobra.Command{
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Use: "mkhello <disk-image> filename",
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Short: "create an FHELLO program that loads and runs another file",
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Long: `
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mkhello creates file DF01:FHELLO that loads and runs another program at a specific address.
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Examples:
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mkhello test.dsk FDEMO # load and run FDEMO at the default address, then jump to the start of the loaded code.
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mkhello test.dsk --address 0x2000 --start 0x2100 DF06 # load and run file DF06 at address 0x2000, and jump to 0x2100.`,
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Run: func(cmd *cobra.Command, args []string) {
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if err := runMkhello(args); err != nil {
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fmt.Fprintln(os.Stderr, err.Error())
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os.Exit(-1)
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}
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},
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}
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func init() {
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nakedosCmd.AddCommand(mkhelloCmd)
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// Here you will define your flags and configuration settings.
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mkhelloCmd.Flags().Uint16VarP(&address, "address", "a", 0x6000, "memory location to load code at")
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mkhelloCmd.Flags().Uint16VarP(&start, "start", "s", 0x6000, "memory location to jump to")
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}
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// runMkhello performs the actual mkhello logic.
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func runMkhello(args []string) error {
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if len(args) != 2 {
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return fmt.Errorf("usage: diskii mkhello <disk image> <file-to-load>")
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}
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if address%256 != 0 {
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return fmt.Errorf("address %d (%04X) not on a page boundary", address, address)
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}
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if start < address {
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return fmt.Errorf("start address %d (%04X) < load address %d (%04X)", start, start, address, address)
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}
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sd, err := disk.Open(args[0])
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if err != nil {
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return err
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}
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op, err := disk.OperatorFor(sd)
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if err != nil {
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return err
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}
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if op.Name() != "nakedos" {
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return fmt.Errorf("mkhello only works on disks of type %q; got %q", "nakedos", op.Name())
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}
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nakOp, ok := op.(supermon.Operator)
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if !ok {
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return fmt.Errorf("internal error: cannot cast to expected supermon.Operator type")
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}
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addr, symbolAddr, _, err := nakOp.ST.FilesForCompoundName(args[1])
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if err != nil {
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return err
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}
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if addr == 0 && symbolAddr == 0 {
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return fmt.Errorf("cannot parse %q as valid filename", args[1])
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}
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toLoad := addr
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if addr == 0 {
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toLoad = symbolAddr
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}
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contents := []byte{
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0x20, 0x40, 0x03, // JSR NAKEDOS
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0x6D, 0x01, 0xDC, // ADC NKRDFILE
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0x2C, toLoad, 0xDF, // BIT ${file number to load}
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0x2C, 0x00, byte(address >> 8), // BIT ${target page}
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0xD8, // CLD
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0x4C, byte(start), byte(start >> 8), // JMP ${target page}
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}
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fileInfo := disk.FileInfo{
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Descriptor: disk.Descriptor{
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Name: fmt.Sprintf("DF01:%s", helloName),
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Length: len(contents),
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Type: disk.FiletypeBinary,
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},
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Data: contents,
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}
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_, err = op.PutFile(fileInfo, true)
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if err != nil {
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return err
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}
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f, err := os.Create(args[0])
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if err != nil {
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return err
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}
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_, err = sd.Write(f)
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if err != nil {
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return err
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}
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if err = f.Close(); err != nil {
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return err
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}
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return nil
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}
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