TheFausap / VygerASM

a VM written using OTCC

Geek Repo:Geek Repo

Github PK Tool:Github PK Tool

VygerASM

a VM (and assembler) written using OTCC

This is a very special C language. Based on K&R syntax, using the Obfuscated Tiny C Compiler, created by F. Bellard (https://bellard.org/otcc/). The compiler itself is a joy and merciless... each syntax error is a "segmentation fault" :)

This version of C is really close to machine level. For example, No fancy stuff like FILE structures... only low level open, read, write.

Memory and CPU

#define MEMSIZE	0x800 /* 512W of RAM */

/* instruction format (generic) */ 
/* (r<<8)|(ind<<7)|(reg<<4)|op  */

/* instruction format (i/o)     */
/* (r<<8)|(t<<4)|op             */
/* t is:                        */
/*       00 = console to IOA    */
/*       01 = console from IOA  */
/*       02 = disk from IOA     */
/*       03 = disk to IOA       */

/* opcode format (integer operations) */
/* opR[#|i]nnn                        */
/* where R is regno.                  */
/*       # is immediate value         */
/*       i is indirect value          */
/*       m is the value or address    */

About

a VM written using OTCC


Languages

Language:C 98.9%Language:Assembly 0.6%Language:Makefile 0.5%