From 1ce349ef26e4dff322a2a9d67af4c34fe63c28d9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bernd=20Wilhelm=20B=C3=B6ckmann?= <bernd-git@boeckmann.io>
Date: Thu, 16 May 2024 22:49:17 +0200
Subject: [PATCH] fixes #148

---
 kernel/config.c | 5 +----
 kernel/main.c   | 9 +++++++--
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/kernel/config.c b/kernel/config.c
index ddd9b76..a8ea992 100644
--- a/kernel/config.c
+++ b/kernel/config.c
@@ -351,10 +351,7 @@ void PreConfig(void)
 #ifdef DEBUG
 /*  printf("Preliminary %d buffers allocated at 0x%p\n", Config.cfgBuffers, buffers);*/
 #endif
-
-  LoL->DPBp =
-      DynAlloc("DPBp", blk_dev.dh_name[0], sizeof(struct dpb));
-
+  
   LoL->sfthead = MK_FP(FP_SEG(LoL), 0xcc); /* &(LoL->firstsftt) */
   /* LoL->FCBp = (sfttbl FAR *)&FcbSft; */
   /* LoL->FCBp = (sfttbl FAR *)
diff --git a/kernel/main.c b/kernel/main.c
index e846e79..f2a61e0 100644
--- a/kernel/main.c
+++ b/kernel/main.c
@@ -547,8 +547,13 @@ STATIC VOID update_dcb(struct dhdr FAR * dhp)
   if (nunits == 0) return;
 
   /* allocate memory for new device control blocks, insert into chain [at end], and update our pointer to new end */
-  dpb = (struct dpb FAR *)KernelAlloc(nunits * sizeof(struct dpb), 'E', Config.cfgDosDataUmb);
-  
+  if ( LoL->first_mcb ) {
+    dpb = (struct dpb FAR *)KernelAlloc(nunits * sizeof(struct dpb), 'E', Config.cfgDosDataUmb);
+  }
+  else {
+    dpb = DynAlloc("DPBp", blk_dev.dh_name[0], sizeof(struct dpb));
+  }
+
   /* find end of dpb chain or initialize root if needed */
   if (LoL->nblkdev == 0)
   {