OSDev.org

Hi all,

MikeOS 4.1 is out now with the following changes:

• BASIC variable assignment enhanced: can now take multiple values and variables, eg "x = a + 2 * b + 3"
• Two new system calls: os_port_byte_out and os_port_byte_in -- send/receive bytes from ports
• os_serial_port_enable system call: now takes 0 in AX for normal mode (9600 baud as before), or 1 for a new slow mode (1200 baud)
• New SERIAL command in BASIC: "SERIAL ON 1200" or "SERIAL ON 9600" to enable, "SERIAL SEND X" or "SERIAL SEND 50" to send a byte, and "SERIAL REC X" to receive a byte into a variable
• New PORT command in BASIC: "PORT OUT 1234 X" or "PORT OUT 1234 20" to send byte to a port, and "PORT IN 1234 X" to receive a byte
• source/features/serial.asm renamed to source/features/ports.asm as it now contains new non-serial routines
• os_get_random rewritten: now takes low and high values in AX and BX, and returns random int between them (inclusive) in CX; also has new os_seed_random routine used by the kernel
• New RAND command in BASIC: generates a random number between two values and stores the result in a variable
• CLI command checking code simplified -- no need to point SI to the input string each time
• BASIC CURSORCHAR command is now CURSCHAR, so that it doesn't look like a superset of the CURSOR command
• API bumped to version 13
• Handbook updates and fixes

Thanks to Paulo Valongo, Ian Seyler and Steve for their work. It's available at:

http://mikeos.sourceforge.net

We also have a new Downloads section for contributed MikeOS projects and programs. This includes:

• libmikeos, a library for writing MikeOS programs in C
• MikeOS-Xfer, an Xmodem-based program for serial file transfers
• ADC-PC, an analogue-to-digital converter project for kids

Cheers,
Mike

I tried your floppy image, and everything seems to work fine.

I could however crash the system by typing in an invalid opcode in the debugger, but since it's real mode I don't know if you planned on fixing that.

Thanks for testing Combuster. Yes, the machine code monitor doesn't have any sanity checks, as it assumes the user knows exactly what he/she is doing -- as opposed to the BASIC interpreter which does a few checks to cover obvious errors

M

Every thing seems to work fine here to. Nice work

Hi all,

Just a small update. We've released MikeOS 4.1.2, which contains a few bugfixes, but I also wanted to note the increased use of MikeOS BASIC. It has been ported to a few other operating systems (eg DexOS, BareMetal) and we have some new applications, eg Memory Editor:

http://mikeos.berlios.de/images/memedit.png

http://mikeos.berlios.de/source/memedit.bas.txt

This shows what MikeOS BASIC is capable of. The source code is in source/features/basic.asm for anyone who wants to try porting it. There's also a detailed handbook describing the (quite limited) interpreter at: http://mikeos.berlios.de/handbook-appdev-basic.html

Cheers,
Mike

Great work mike, your OS just gets better and better, MikeOS has inspired many OS's, including the project you mentioned "BareMetal" which i also follow closely.

Wow, this is pretty dang cool. Definitely inspiration to keep working on what I'm working on.

I'll work on porting MikeOS Basic after Blacklight OS can load stuff from disk for sure.