Blue Swirl wrote:
scientific space project I'm thinking about including an FCode
interpreter into the onboard software.
The target system is a Leon3 processor (Sparc-V8) in FPGA with serial
port(s), spacewire and a few other interfaces.
I'm able to compile & run bare C applications (gcc cross-compiler), so
it seems to me that I don't need a real BIOS.
So you probably won't need SCSI or floppy drivers or any of the filesystems.
These can be disabled by editing config/examples/cross-sparc32_config.xml.
Thanks, I'll try to disable them.
What kind of serial port is this, Zilog or PC
None of the above, a special serial interface integrated into the processor.
You can simply assume, that stdin/stdout are connected to the serial
port at main() startup.
Ideally the complete FORTH system should be in
the range of 32-40 kBytes...
That can be difficult to achieve, currently the full build is 150k C code +
100k Forth. I don't know how much of the Forth is needed. Taking out
unwanted drivers etc. could help a lot on C side, but down to 30-40k?
Really that large ? I don't have experience with 32-bit Forth'es. 16-Bit
systems usually have a small footprint.
Okay, I have a 64 KByte PROM, and I forgot that the code could be
compressed, perhaps a FCode interpreter for ~64 kByte could do it...
Thanks & regards,
German Aerospace Center
Institute of Planetary Research
D-12489 Berlin, Rutherfordstrasse 2
Tel/Fax: (+49) (30) 67055-416/384