ST251
Experienced Member
I've been tinkering with Plus Hardcards (most of them are dead for various reasons) and I have a few that will read some tracks but not all. That got me thinking that it was MFM style magnetic field degradation (the style that's fixed with a low level format).
Now most of the cards I have don't allow low level formatting, booting you out the program to a *Fixed Disk BIOS Error* screen but then I encountered one that actually let me low level format it. I'm just wondering what routine did they patch out in the later BIOSes and would it be possible to undo their changes? The biggest complication is that the card that lets you low level format it is a Hardcard 20 and I want to recover a Hardcard 40.
Now most of the cards I have don't allow low level formatting, booting you out the program to a *Fixed Disk BIOS Error* screen but then I encountered one that actually let me low level format it. I'm just wondering what routine did they patch out in the later BIOSes and would it be possible to undo their changes? The biggest complication is that the card that lets you low level format it is a Hardcard 20 and I want to recover a Hardcard 40.