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Chapter 6

DOS PSEUDO—DISK

This software package enables one to use the Saturn RAM

Board(s) for storing programs and data in a very similar manner

as is done on disk, Of course, the RAM board does not in any way

resemble a disk drive; however, through appropriate software, DOS

can be fooled into thinking that the card(s) is just another disk

drive. As a result, applications programs which use DOS for

saving and loading programs and data will also see the Saturn RAM

board as a disk drive.

In order to be able to use the Saturn RAM Board as a pseudo—

disk, controlling software routines must be loaded and some

initialization accomplished. The DOS PSEUDO DISK package

consists of three programs which serve to perform this loading and

initialization of the PSEUDO DISK. These files must be present

on the same disk in order to set—up and install the PSEUDO DISK.

PSEUDO DISK — Menu driver Applesoft program which is used to

set up the PSEUDO DISK parameters and install

the pseudo disk.

PSEUDO.NRM — Binary program which contain the disk drivers

and patches to DOS for operation with a normal

(not relocated DOS)

PSEUDO.MVD — Binary program which consists of driver soft-

ware and patches to DOS for operation with the

relocated DOS.

PSEUDO

PARAMETERS- File updated by PSEUDO DISK program with

system parameters, location, and type of memory

boards present, etc.

I. FEATURES AND REQUIREMENTS OF THE PSEUDO DISK SYSTEM

The pseudo—disk is designed to operate with both standard

and relocated DOS 3.3 or 3.2.

The pseudo—disk system will work with one or more Saturn

RAM boards, making available all of this memory for storage. A

maximum of 256K can be used for the PSEUDO DISK.

A feature has been provided which allows reservation of

space in the RAM board for BASIC, if access to the alternate

BASIC (Integer on an Apple II plus; Applesoft on an Apple II) is

desired.

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Apple Logic Board Technical Information Seite 48