Add some basic programs for currently built modules

1 files changed, 35 insertions, 0 deletions

diff --git a/sb_vfd/vfd.bas b/sb_vfd/vfd.bas
new file mode 100644
index 0000000..aed987c
--- /dev/null
+++ b/sb_vfd/vfd.bas
@@ -0,0 +1,35 @@
+10 GOSUB 4000     : REM initialize
+20 GOSUB 4100     : REM cursor off
+30 T$ = "Hello, World"
+40 GOSUB 4500     : REM print string
+
+999 GOTO 999
+
+4000 OUT 0, &H30  : REM function set - 8 bit
+4010 OUT 1, 0     : REM max brightness
+4020 OUT 0, 1     : REM clear display
+4030 OUT 0, &H0F  : REM display on, cursor on, blink on
+4040 RETURN
+
+4099 REM turn cursor off
+4100 OUT 0, &H0C  : REM display on, cursor off
+4110 RETURN
+
+4199 REM turn cursor on
+4200 OUT 0, &H0F  : REM display on, cursor on, blin on
+4210 RETURN
+
+4299 REM clear screen
+4300 OUT 0, 1
+4310 RETURN
+
+4399 REM goto X, Y
+4400 DA = &H80 + (&H40 * Y) + X
+4410 OUT 0, DA
+4420 RETURN
+
+4499 REM print string
+4500 FOR I=1 to LEN(T$)
+4510 OUT 1, ASC(MID$(T$, I, 1))
+4520 NEXT I
+4530 RETURN