Extract block from or replace a block on an amigaDisk object

Extract an amigaBlock from an amigaDisk object, or replace it on the disk.

Usage

# S4 method for amigaDisk,numeric
amigaBlock(x, block)

# S4 method for amigaDisk,numeric,amigaBlock
amigaBlock(x, block) <- value

Arguments

x

An amigaDisk object from which the block needs to be extracted or on which the block needs to be replaced.

block

A numeric identifier (whole numbers ranging from 0 up to 1759 (DD disk) or 3519 (HD disk)).

value

An amigaBlock object with which the block at the specified location on the disk needs to be replaced.

Value

The amigaBlock object at the specified location is returned. In case of the replace method, an amigaDisk

object with a replaced amigaBlock is returned.

Details

Information is stored in 512 byte blocks on floppy disks. This method extracts a specific block at a numeric identifier (whole numbers ranging from 0 up to 1759 (DD disk) or 3519 (HD disk)) from an amigaDisk object.

See also

Other block.operations: get.blockID(), get.diskLocation()

Author

Pepijn de Vries

Examples

## get the root block from the example adf:
amigaBlock(adf.example, 880)
#> 0x000  00000002 00000000 00000000 00000048  ...............H
#> 0x010  00000000 F665FC39 00000000 00000000  ....öeü9........
#> 0x020  00000000 00000000 00000000 00000000  ................
#> 0x030  00000000 00000000 00000000 00000000  ................
#> 0x040  00000000 00000000 00000000 00000000  ................
#> 0x050  00000000 00000000 00000000 00000000  ................
#> 0x060  00000000 00000000 00000000 00000000  ................
#> 0x070  00000373 00000000 00000372 00000000  ...s.......r....
#> 0x080  00000000 00000000 00000000 00000000  ................
#> 0x090  00000000 00000000 00000000 00000000  ................
#> 0x0A0  00000000 00000000 00000000 00000000  ................
#> 0x0B0  00000000 00000000 00000000 00000000  ................
#> 0x0C0  00000000 00000000 00000000 00000000  ................
#> 0x0D0  00000000 00000000 00000375 00000000  ...........u....
#> 0x0E0  00000000 00000374 00000000 00000000  .......t........
#> 0x0F0  00000000 00000000 00000000 00000000  ................
#> 0x100  00000000 00000000 00000000 00000000  ................
#> 0x110  00000000 00000000 00000000 00000000  ................
#> 0x120  00000000 00000000 00000000 00000000  ................
#> 0x130  00000000 00000000 FFFFFFFF 00000371  ........ÿÿÿÿ...q
#> 0x140  00000000 00000000 00000000 00000000  ................
#> 0x150  00000000 00000000 00000000 00000000  ................
#> 0x160  00000000 00000000 00000000 00000000  ................
#> 0x170  00000000 00000000 00000000 00000000  ................
#> 0x180  00000000 00000000 00000000 00000000  ................
#> 0x190  00000000 00000000 00000000 00000000  ................
#> 0x1A0  00000000 000038C6 0000027D 00000716  ......8Æ...}....
#> 0x1B0  0D616466 4578616D 706C654F 46530000  .adfExampleOFS..
#> 0x1C0  00000000 00000000 00000000 00000000  ................
#> 0x1D0  00000000 00000000 000038C6 000002B5  ..........8Æ...µ
#> 0x1E0  000006DB 000038C6 000001C4 000007E3  ...Û..8Æ...Ä...ã
#> 0x1F0  00000000 00000000 00000000 00000001  ................

## Create a completely blank disk without file system:
blank.disk <- new("amigaDisk")

## Replace the boot block on the blank disk with
## that from the example object:
amigaBlock(blank.disk, 0) <- amigaBlock(adf.example, 0)

## The blank disk now has a boot block,
## but still no file system...