The future of our hobby (was Re: ImageDisk project is canceled)

[woodelf]

Tony Duell wrote:

>[1] Note for the uninitiated. The IBM serial card has 2 odd features that 
>were not present in most, if not all, clones. The first is that it can 
>pull pin B8 (IIRS) low during I/O reads, needed if the card is used in 
>slot 8 of the IBM PC/XT. The second is that it has a current loop 
>interface  as well as RS232 .
>
>  
>
Does any of the newer serial cards have the current loop option?
Was it only TTY's that used the current loop?