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Merge branch 'master' of https://github.com/dschmenk/PLASMA

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David Schmenk 2014-06-08 20:30:00 -07:00
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README.md
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# PLASMA 123
# PLASMA 123 (1][///)
## Introduction
PLASMA is a combination of virtual machine and assembler/compiler matched closely to the 6502 architecture. It is an attempt to satisfy a few challenges surrounding code size, efficient execution, small runtime and flexible code location. By architecting a unique bytecode that maps nearly one-to-one to the higher level representation, the compiler/assembler can be very simple and execute quickly on the Apple II for a self-hosted environment. A modular approach provides for incremental development and code reuse. Different projects have led to the architecture of PLASMA, most notably Apple Pascal, FORTH, and my own Java VM for the 6502, VM02. Each has tried to map a generic VM to the 6502 with varying levels of success. Apple Pascal, based on the USCD Pascal using the p-code interpreter, was a very powerful system and ran fast enough on the Apple II to be interactive but didn't win any speed contests. FORTH was the poster child for efficiency and obtuse syntax. Commonly referred to as a write only language, it was difficult to come up to speed as a developer, especially when using other's code. My own project in creating a Java VM for the Apple II uncovered the folly of shoehorning a large system into something never intended to run 32 bit applications.

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User Manual.md
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```
./plasm -AM < hello.pla > hello.a
acme --setpc 4096 -o HELLO.REL hello.a
acme --setpc 4094 -o HELLO.REL hello.a
./plvm HELLO.REL
```
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Hello, world.
```
A couple of things to note: **plasm** only accepts input from stdin and output to stdout. To build **acme** compatible module source, tha '-AM' flags must be passed in. The **acme** assembler needs the --setpc 4096 to assemble the module at the proper address, and the -o option sets the output file. The makefile in the lawless-legends/PLASMA/src directory has automated this process. Enter:
A couple of things to note: **plasm** only accepts input from stdin and output to stdout. To build **acme** compatible module source, tha '-AM' flags must be passed in. The **acme** assembler needs the --setpc 4094 to assemble the module at the proper address ($1000 - 2), and the -o option sets the output file. The makefile in the lawless-legends/PLASMA/src directory has automated this process. Enter:
```
make hello