wip

README.md

@@ -1 +1,33 @@
 # PDP-1 Playground
+
+## Dependencies
+```
+sudo apt-get install git build-essential flex bison texinfo libgmp3-dev libmpfr-dev libmpc-dev simh dejagnu
+```
+
+## Building binutils
+```
+cd pdp1-binutils
+./configure --target=pdp1-elf --disable-sim
+make -j $(nproc)
+sudo make install
+```
+
+## Building gcc
+```
+cd pdp1-gcc
+./configure --target=pdp1-elf --enable-languages=c --disable-bootstrap
+make -j $(nproc) all-gcc
+```
+
+## Building and running samples
+
+```
+cd c-print-for-loop
+make main.s main.rim run
+```
+
+## Running tests
+```
+runtest --srcdir $(pwd)
+```

common/common.mk

@@ -8,7 +8,10 @@ default: $(APP_NAME).rim
 %.s: %.c
 	../pdp1-gcc/host-x86_64-pc-linux-gnu/gcc/cc1 $<
 
-%.o: %.[Ss]
+%.o: %.S
+	pdp1-elf-as $< -o $@
+
+%.o: %.s
 	pdp1-elf-as $< -o $@
 
 $(APP_NAME).bin: ../common/common.ld $(objects)