PSL for macintel64 trap/signal handling: Print type of arithmetic exception, handle more signals.
PSL for macintel64: sysreadrec calls unixfgets instead of fgets so that interrupted reads are restarted.
PSL kernel for macintel64: amke sure that system calls are restartable after a signal,
PSL disassembler for macintel64: fix printing of symbol references
bare-psl start script for macintel64: use env. vars instead of absolute paths
PSL for macintel64: make sure that characters with high order bit are not converted to sign extended negative integers during printing.
PSL for macintel64: set default heapsize in bpsl executable to 1000MB (which is the default in all scripts anyway).
PSL for macintel64: Correction for reading characters with high bit set from terminal