From e34ae6198426a0fd0186b29f8518a914dcb1a94c Mon Sep 17 00:00:00 2001
From: Leo C <erbl259-lmu@yahoo.de>
Date: Wed, 1 Jun 2016 21:25:34 +0200
Subject: [PATCH] Implement media change flag

---
 avr/z180-serv.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/avr/z180-serv.c b/avr/z180-serv.c
index a49c9f9..d8e412f 100644
--- a/avr/z180-serv.c
+++ b/avr/z180-serv.c
@@ -256,6 +256,13 @@ int drv_detach(uint8_t drv)
 			p->opt = 0;
 			p->flags &= ~DRV_FLG_DIRTY;
 			p->img_name = NULL;
+
+			uint32_t scb = getenv_ulong(ENV_CPM3_SCB, 16, 0);
+			if (scb && (z80_bus_cmd(Request) & ZST_ACQUIRED)) {
+				z80_write(scb + 0xf0, 0xff);
+				z80_write(p->dph + 11, 0xff);
+				z80_bus_cmd(Release);
+			}
 		}
 	}
 	return 0;
-- 
2.39.2