Acorn Disk Operating System - DOS

"This is a 4K byte program providing support for other programs by dealing with peripherals and allowing programs to be filled on mini-floppy disks. It supports Acorn's Teletext VDU, a parallel ASCII keyboard and a Centronics style parallel printer via a VIB. The mini-floppy is Acorn's single density single-sided drive with controller, giving the user 100K bytes of file space. A second mini-floppy drive can be added."

 

(VIB refers to the Versatile Interface Board)

 

Source code (ca65 format) to follow

Listing file to follow

 

Object codes:

DOS80  (version for 80x25 vdu)

DOS40R  (version for 40x25 Teletext vdu with type R 6845)

DOS40S  (version for 40x25 Teletext vdu with type S 6845)

 

Generally the type S version should be used, this works with the Motorola 6845

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