DTFCP supported some subset of disk and tape I/O capabilities. 

Charles


-----Original Message-----
From: IBM Mainframe Assembler List [mailto:[email protected]]
On Behalf Of Paul Gilmartin
Sent: Monday, January 29, 2018 11:17 AM
To: [email protected]
Subject: Re: Fair comparison C vs HLASM

On 2018-01-29, at 11:55:56, Seymour J Metz wrote:

> While the DOS I/O was very device dependent, there was the DTFDI with
limited device independence.
> 
Insofar as "device independence" means restricting every device type to the
capabilities of a card reader/punch.

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