Mercurial > hg > Members > kono > os9 > sbc09

changeset 27:2d6772a5c076

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os9p2
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 11 Jul 2018 02:02:42 +0900
parents 51a35f0347f6
children d34482fd6945
files os9/level2/boot.asm
diffstat 1 files changed, 5 insertions(+), 4 deletions(-) [+]
line wrap: on
line diff
--- a/os9/level2/boot.asm	Wed Jul 11 01:00:18 2018 +0900
+++ b/os9/level2/boot.asm	Wed Jul 11 02:02:42 2018 +0900
@@ -39,11 +39,12 @@
      **  read boot rom file size
          os9    F$LDDDXY 
          bcs    last
+         addb   #$ff     
+         adca   #0
+         clrb
          std   ,s       size return as d
-         addb   #$ff     BtMem give us a little smaller memory
-         adda   #$2f     request +0x2000
-         clrb
-         anda   #$e0
+      ** BtMem give us a little smaller memory
+         adda   #$20     request +0x2000
          os9    F$BtMem
          bcs    last
      **  u points the memory