Add hello world for VFD configured for M68 with LCD/VFD board configured for M68.

1 files changed, 31 insertions, 0 deletions

diff --git a/addon/sb_vfd/vfd_m68.bas b/addon/sb_vfd/vfd_m68.bas
new file mode 100644
index 0000000..d3e97ca
--- /dev/null
+++ b/addon/sb_vfd/vfd_m68.bas
@@ -0,0 +1,31 @@
+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 2 lines, 8-bit
+4010 OUT 1, &H0    : REM max brightness
+4020 GOSUB 4299
+4030 OUT 0, &H0F   : REM Display on, cursor blinking
+4040 RETURN
+
+4099 REM turn cursor off
+4100 OUT 0, &H0C   : REM display on, cursor off
+4110 RETURN
+
+4299 REM clear screen
+4300 OUT 0, &H01   : REM Clear display screen
+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