kjarosh / besm-emulator

An extended emulator of BESM - a Soviet mainframe computer, implemented in Java.

BESM Emulator

Extended emulator of BESM - Soviet mainframe computer, implemented in Java.

Usage

Type besm -h for help.

• besm <fielname> - read and process filename,
• besm <filename> -b - work in binary mode,
• besm <filename> -d - work in debug mode,
• besm <filename> -e - work in extended debug mode.

File format

Every file contains memory cells. A single cell consists of address and value.

Binary mode

In binary mode file is read as an array of 32-bit integer values. Every value has it's corresponding address starting from 0 and incrementing till array_length - 1.

Example:

01050607 // first instruction - c = a + b
00010007 // second instruction - print c
00000000 // third instruction - stop

00000000
00000000

0000A012 // a
00000701 // b
00000000 // c

Plain mode

In plain mode input is encoded as text. Every cell has it's given address.

Example:

0: 1 5 6 7 // zero address value - c = a + b
1: 0 1 0 7 // print c
2: 0 0 0 0 // stop

5: 147 // a
6: 23  // b
7: 0   // c