Changeset 602 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeTransfer.asm

Timestamp:

May 9, 2019, 8:11:46 PM (5 years ago)

Author:

krille_n_

Message:

Changes:

• SerDrive: Fixed a bug that prevented use of 3.5" 720 KB floppy disk images.
• Also added support for Microsoft DMF (Distribution Media Format) floppy disk images.
• XTIDECFG / Library: Minor size optimizations. Added a new macro (SKIP1B) as part of that.
• BIOS: A small size optimization (2 bytes) to MODULE_8BIT_IDE_ADVANCED that is enabled only when USE_NEC_V is defined.

File:

• trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeTransfer.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeTransfer.asm

@@ -253 +253 @@
 
 %elifdef USE_186
+%ifdef USE_NEC_V
+    mov     dx, es
+    xor     ax, ax
+    eROL4   dl
+    eROL4   dh
+    add     si, dx
+    adc     al, ah
+    mov     es, ax
+
+%else
     mov     ax, es
     rol     ax, 4
@@ -262 +272 @@
     mov     es, ax
 
+%endif
 %else ; 808x
     mov     al, 4