Changeset 258 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Inc/RamVars.inc

Timestamp:

Feb 22, 2012, 7:01:53 PM (12 years ago)

Author:

gregli@…

google:author:

gregli@hotmail.com

Message:

Added floppy drive emulation over the serial connection (MODULE_SERIAL_FLOPPY). Along the way, various optimizations were made to stay within the 8K ROM size target. Also, serial code now returns the number of sectors transferred.

File:

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

trunk/XTIDE_Universal_BIOS/Inc/RamVars.inc

@@ -11 +11 @@
 struc XLATEVARS
     .wFDandHDswap:
-    .bFDSwap        resb    1   ; Floppy Drive to swap to 00h and vice versa
-    .bHDSwap        resb    1   ; Hard Drive to swap to 80h and vice versa
-    .bXlatedDrv     resb    1   ; Drive number after translation
-                    resb    1   ; alignment
+    .bFDSwap            resb    1   ; Floppy Drive to swap to 00h and vice versa
+    .bHDSwap            resb    1   ; Hard Drive to swap to 80h and vice versa
+    .bXlatedDrv         resb    1   ; Drive number after translation
+%ifdef MODULE_SERIAL_FLOPPY
+    .bFlopCreateCnt:
+    .bFlopCntAndFirst   resb    1   ; Normally, packed starting floppy drive number (high order 7 bits)
+                                    ; and number of drives (low order bit, max 2 drives supported).
+                                    ; During initialization, until the end of DetectDrives_FromAllIDEControllers,
+                                    ; this byte contains the raw number of floppy drives seen (using .bFlopCreateCnt)
+%else
+                        resb    1   ; alignment
+%endif
 endstruc
 
@@ -27 +35 @@
 
     .wDrvCntAndFirst:
+    .bFirstDrv          resb    1   ; Number of first drive for this BIOS
     .bDrvCnt            resb    1   ; Number of drives handled by this BIOS
-    .bFirstDrv          resb    1   ; Number of first drive for this BIOS
 
     ; Variables for drive number translation