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new tool: creating a data disk

This commit is contained in:
Kartik K. Agaram 2021-08-10 08:59:00 -07:00
parent b0a83af0e5
commit 350a255134
2 changed files with 19 additions and 1 deletions
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8
shell/README.md
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@ -22,7 +22,13 @@ Currently runs a tiny dialect of Lisp. Steps to run it from the top-level:
dd if=shell/data.limg of=data.img conv=notrunc
```
Run with data disk (and 2GB of RAM):
Equivalently, use `tools/image-data`.
```sh
tools/image-data 10 < shell/data.limg
```
3. Run with data disk (and 2GB of RAM):
```sh
qemu-system-i386 -m 2G -hda code.img -hdb data.img
```

12
tools/image-data Executable file
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@ -0,0 +1,12 @@
#!/bin/sh
# Create a disk image containing some (text) data.
if [ $# -eq 0 ]
then
echo "Fill disk of some capacity (in MB) from stdin"
echo "usage: image-data capacity"
exit 1
fi
dd if=/dev/zero of=data.img count=$(($1*2016)) # 32 * 63 sectors/track
dd of=data.img conv=notrunc