Gigatron Hackers

There exists a github project with an early smt/smd clone board draft. It seem good pre-developed from monsonite, but it looks unfinished and untested. Maybe this could be a good base for the further development of a gigatron ttl smd clone. Further details can be found here: https://github.com/monso...

I have 2 questions to C programs:
(1.) Are studio file functions fopen, fread, fwrite, fseek, fclose are supported for SD card file access ?
(2.) How much free space for allocation is available for a C program with the 128kb system memory ?