Changeset 316 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Inc

Timestamp:

Mar 11, 2012, 3:56:34 AM (13 years ago)

Author:

gregli@…

google:author:

gregli@hotmail.com

Message:

Fixed a bug with ah0h/reset of a serial drive that was found during COM detect.

File:

• trunk/XTIDE_Universal_BIOS/Inc/RomVars.inc (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Inc/RomVars.inc

@@ -24 +24 @@
     .bStealSize         resb    1   ; Number of 1kB blocks stolen from 640kB base RAM
 
+    .ideVarsBegin:
     .ideVars0           resb    IDEVARS_size
     .ideVars1           resb    IDEVARS_size
@@ -32 +33 @@
     .ideVarsSerialAuto  resb    IDEVARS_size
 %endif
+
+    .ideVarsEnd:
 endstruc
+
+%ifndef CHECK_FOR_UNUSED_ENTRYPOINTS
+    %if ROMVARS.ideVarsEnd & 0xff00 <> 0
+        %error ".ideVars structures must fit within the first 256 bytes of the ROM image"
+    %endif
+    %if (ROMVARS.ideVarsEnd - ROMVARS.ideVarsBegin) = 0
+        %error "there must be at lesat one .ideVars structure, it would be bizarre if this were not true, but it is assumed in the ah0h reset code."
+    %endif
+%endif
 
 ; Bit defines for ROMVARS.wFlags