Mercurial > hg > Members > kono > nitros9-code

diff level2/modules/kernel/freboot.asm @ 1145:ca83286ded5b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Start of new OS-9 L2 Kernel
author boisy
date Tue, 22 Apr 2003 19:35:48 +0000
parents
children
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/level2/modules/kernel/freboot.asm	Tue Apr 22 19:35:48 2003 +0000
@@ -0,0 +1,32 @@
+******************************************************
+* F$ReBoot entry point
+*   Currently disabled (doesn't work)
+*   Besides, there's no need for this code to be in system memory.
+*   A user-mode program can do this just as well.
+*
+* Entry A = 0 Cold ReBoot
+*         = 1 Quit to RSDOS
+*
+*ReBoot   equ    *
+*         orcc   #Carry       Set error flag
+*         rts                 Exit
+*        tst    R$A,u        Cold start (a=0)
+*        bne    WarmBt       no, attempt a warm boot
+*WarmBt   orcc   #IntMasks
+*         ldb    #CodeSize
+*         leax   BootCode,pc
+*         tfr    0,y
+*BootLoop lda    ,x+
+*         sta    ,y+
+*         decb
+*         bne    BootLoop
+*         jmp    >$0000
+*BootCode equ   *
+*        lda   >$ffa8
+*        sta   >$ffa0
+*         clra
+*         sta   >$ff90
+*        sta   >$ff91
+*         jmp   >$ed5f
+*CodeSize equ   *-BootCode
+