Added .nbi as a format.

diff --git a/src/arch/i386/Makefile b/src/arch/i386/Makefile
index 8fa5176..ce147b7 100644 (file)
--- a/src/arch/i386/Makefile
+++ b/src/arch/i386/Makefile
@@ -80,6 +80,10 @@ MEDIA                        += dsk
 OBJS_dskprefix         = dskprefix zdskprefix
 CFLAGS_zdskprefix      = $(CFLAGS_ZPREFIX)
 
+MEDIA                  += nbi
+OBJS_nbiprefix         = nbiprefix znbiprefix
+CFLAGS_znbiprefix      = $(CFLAGS_ZPREFIX)
+
 MEDIA                  += hd
 OBJS_hdprefix          = hdprefix zhdprefix
 CFLAGS_zhdprefix       = $(CFLAGS_ZPREFIX)

diff --git a/src/arch/i386/prefix/nbiprefix.S b/src/arch/i386/prefix/nbiprefix.S
new file mode 100644 (file)
index 0000000..79595a2
--- /dev/null
+++ b/src/arch/i386/prefix/nbiprefix.S
@@ -0,0 +1,65 @@
+       .text
+       .arch i386
+       .section ".prefix", "ax", @progbits
+       .section ".prefix.data", "aw", @progbits
+       .code16
+       .section ".prefix"
+       .org 0
+
+nbi_header:
+       
+/*****************************************************************************
+ * NBI file header
+ *****************************************************************************
+ */
+file_header:
+       .long   0x1b031336      /* Signature */
+       .byte   0x04            /* 16 bytes header, no vendor info */
+       .byte   0
+       .byte   0
+       .byte   0               /* No flags */
+       .word   0x0000, 0x07c0  /* Load header to 0x07c0:0x0000 */
+       .word   entry, 0x07c0   /* Start execution at 0x07c0:entry */
+       .size   file_header, . - file_header
+
+/*****************************************************************************
+ * NBI segment header
+ *****************************************************************************
+ */
+segment_header:
+       .byte   0x04            /* 16 bytes header, no vendor info */
+       .byte   0
+       .byte   0
+       .byte   0x04            /* Last segment */
+       .long   0x00007e00
+       .long   _load_size - 512
+       .long   _load_size - 512
+       .size   segment_header, . - segment_header
+
+/*****************************************************************************
+ * NBI entry point
+ *****************************************************************************
+ */
+entry:
+       /* Install low and high memory regions */
+       call    install
+
+       /* Jump to .text16 segment */
+       pushw   %ax
+       pushw   $1f
+       lret
+       .section ".text16", "awx", @progbits
+1:
+       pushl   $main
+       pushw   %cs
+       call    prot_call
+       popl    %eax /* discard */
+
+       /* Reboot system */
+       int $0x19
+
+       .previous
+       .size   entry, . - entry
+
+nbi_header_end:
+       .org 512