refactor: c/ -> usr/, compiled program blobs out of the source tree

Userland sources live in usr/ (fits the Unix theme better than 'c').
SDCC output .bin blobs land in build/usr/ with the other build artifacts
instead of littering the source dir; programs.asm INCBINs them from there.
Byte-identical ROM.

1 files changed, 13 insertions, 0 deletions

diff --git a/usr/blk.c b/usr/blk.c
new file mode 100644
index 0000000..36839c0
--- /dev/null
+++ b/usr/blk.c
@@ -0,0 +1,13 @@
+#include "gbos.h"
+/* blk: exercise the block device.  blk fill <n> <v>   |   blk peek <n> */
+void main(void) {
+    char *argv[4];
+    unsigned char argc = argv_parse(argv, 4);
+    if (argc >= 3 && argv[0][0] == 'f') {
+        bfill(atou(argv[1]), atou(argv[2]));
+    } else if (argc >= 2 && argv[0][0] == 'p') {
+        putu(bpeek2(atou(argv[1]), argc>=3?atou(argv[2]):0)); nl();
+    } else {
+        puts("usage: blk fill <n> <v> | blk peek <n>"); nl();
+    }
+}