minor cleanups, added docs and test files

[dcpu16] / tests / test.s

diff --git a/tests/test.s b/tests/test.s
new file mode 100644 (file)
index 0000000..b67c81b
--- /dev/null
+++ b/tests/test.s
@@ -0,0 +1,33 @@
+;
+; dcpu16 test asm
+;
+
+; Try some basic stuff
+              SET A, 0x30              ; 7c01 0030
+              SET [0x1000], 0x20       ; 7de1 1000 0020
+              SUB A, [0x1000]          ; 7803 1000
+              IFN A, 0x10              ; c00d 
+                 SET PC, crash         ; 7dc1 001a [*]
+ 
+; Do a loopy thing
+              SET I, 10                ; a861
+              SET A, 0x2000            ; 7c01 2000
+:loop         SET [0x2000+I], [A]      ; 2161 2000
+              SUB I, 1                 ; 8463
+              IFN I, 0                 ; 806d
+                 SET PC, loop          ; 7dc1 000d [*]
+
+; Call a subroutine
+              SET X, 0x4               ; 9031
+              JSR testsub              ; 7c10 0018 [*]
+              SET PC, crash            ; 7dc1 001a [*]
+
+:testsub      SHL X, 4                 ; 9037
+              SET PC, POP              ; 61c1
+ 
+; Hang forever. X should now be 0x40 if everything went right.
+:crash        SET PC, crash            ; 7dc1 001a [*]
+
+; [*]: Note that these can be one word shorter and one cycle faster by using the short form (0x00-0x1f) of literals,
+;      but my assembler doesn't support short form labels yet.     
+