From 5508e775897efada888e3cf806fb56a70ec8b2fc Mon Sep 17 00:00:00 2001
From: Gregor Riepl <onitake@gmail.com>
Date: Sat, 20 Aug 2022 20:26:02 +0200
Subject: [PATCH] Add example basic prg

---
 README.md | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index e7d74bc..3725710 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ The other pin mappings are as follows:
 
 | PET pin        | ESP pin | Direction | Cassette 1 external | Cassette 2 internal  |
 |----------------|---------|-----------|---------------------|----------------------|
-| Cassette Write | RXD     | PET->ESP  | VIA PB3             | VIA PB3 (same as #1) |
+| Cassette Write | RXD     | PET->ESP  | VIA PB3             | VIA PB3 (same as 1)  |
 | Cassette Read  | TXD     | ESP->PET  | PIA1 CA1            | VIA CB1              |
 | Cassette Motor | CTS     | PET->ESP  | PIA1 CB2            | VIA PB4              |
 | Cassette Sense | RTS     | ESP->PET  | PIA1 PA4            | PIA1 PA5             |
@@ -87,3 +87,23 @@ Input parameters and return values for `rs_read` and `rs_write` are exchanged vi
 | `rs_available` | $ed     | Available bytes to read or write (size of the input buffer or remaining space in output buffer) |
 | `rs_data`      | $ee     | Data byte (return from read or parameter for write) |
 | `rs_status`    | $ef     | Status of the operation (0=ok, 1=read buffer empty, 2=write buffer full, 3=not initialized, 4=already initialized) |
+
+## Example BASIC Program
+
+This program assumes that the driver is already loaded at start address $7000.
+
+```basic
+10 PRINT "Initializing driver"
+20 SYS (28672)
+30 PRINT "Waiting for input"
+40 SYS (28678)
+50 status = PEEK(239)
+60 IF status <> 0 THEN GOTO 90
+70 char = PEEK(238)
+80 PRINT CHR$(char);
+90 GOTO 40
+100 PRINT
+110 PRINT "Disabling driver"
+120 SYS (28675)
+130 END
+```