795kb adf inage to 800k

[kppot]

Hello,

I need to convert (and read with gotek) few 795kb adf images to 800
I already downloaded DIM/BBCIM, but I am having super hard time trying to figure out how to make that 800 kb images
Could someone please give a blitz tour or a guide how to do so? Like "press that button and the press that button"

Tanks in advance!

[Pernod]

I need to convert (and read with gotek) few 795kb adf images to 800

A 795K image is very likely a bad dump due to missing protection information. The only thing you can try is padding the image file to make it 800K and see if it works. If it doesn't then definitely bad dump, delete it and try to find a better dump.

[geraldholdsworth]

It is possible, but DIM can't (currently) do it. It involves, as Pernod said, padding the file out to 800KB (819200bytes, to be precise) but may also involve using a hex editor to change the size to 0xC8000 (offset location 0xFC) - but you'll also need to calculate and update the checksum (offset location 0xFF). So, again as Pernod said, to find and download an 800KB image.

[kppot]

It involves, as Pernod said, padding the file out to 800KB (819200bytes, to be precise)

Alright, so how do I basically do that? In details please

[geraldholdsworth]

It involves, as Pernod said, padding the file out to 800KB (819200bytes, to be precise)

Alright, so how do I basically do that? In details please

What OS are you using? Windows/Linux/macOS/Other?

[kppot]

What OS are you using? Windows/Linux/macOS/Other?

Win 7, 10 and Macos

[flibble]

I had need of a similar thing recently, so I wrote a short python script, which may help you;

http://home.marutan.net/hg/misc/file/f8 ... /adfpad.py

[IanJeffray]

In Linux, you could do this:

Code: Select all

cat input.adf /dev/zero | dd of=output.adf bs=1024 count=800

[Iggypop]

viewtopic.php?p=382848#p382848

trunc if you use a windows computer.. 800*1024bytes = 819200 bytes