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Build and Run in QEMU

make init
make run

Operational Info

• Only 2880 sector (1.44MB) floppy disks are currently supported
• Only FAT12 read operations are currently supported
• Tiny Memory Model - Code, Data, Stack, Heap all in one segment
• One segment per binary, but frequent use of Far Functions
• Libc has access to Kernel functions
• Executables have access to Libc functions

Assumptions

• When loading files, it is assumed that are under 64k as they would not entirely fit into a segment

Design

• Kernel operates a stack as it executes code
• Libc does not have a stack. The design of the stdlib is to provide far functions to programs that inter-operate with the kernel

Layout Of Memory By Segment

0	1	2	3	4	5	6	7	8+
[Unusable]	Scratch Space (File Loading)	*	*	*	Init (Shell)	Libc	Kernel	[Unusable]