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- ; Initial startup routine for Aztec 'C' and ARP
- ; NB: This should allow access to all Aztec Features, math, etc.
- ; Could be made smaller if only for CLI, only for Workbench,
- ; Could be made smaller if only this or that.
- ;
- ; Created 11/08/87 by -+=SDB+=- from crt0.a68 file provided by Manx
- ; Copyright (c) 1987 by Scott Ballantyne, may be freely
- ; used by Arp Supporters/users
- ;
- ; 10-Mar-90: Some minor rework for Aztec 5.0 release.
- ; This should rather use rstart.asm code.
- ;
-
- include "exec/types.i"
- include "exec/alerts.i"
- include "libraries/arpbase.i"
- include "exec/execbase.i"
-
- call macro
- xref _LVO\1
- jsr _LVO\1(a6)
- endm
-
- mc68881
- entry .begin
- public .begin
- .begin
- bsr _geta4 ;get A4
- lea __H1_end,a1
- lea __H2_org,a2
- cmp.l a1,a2 ;check if BSS and DATA together
- bne start ;no, don't have to clear
- move.w #((__H2_end-__H2_org)/4)-1,d1
- bmi start ;skip if no bss
- moveq #0,d2
-
- loop move.l d2,(a1)+ ;clear out memory
- dbra d1,loop
-
- start move.l sp,__savsp ;save stack pointer
- move.l (4).w,a6 ;get Exec's library base pointer
- move.l a6,_SysBase ;put where we can get it
- movem.l d0/a0,-(sp) ;save CLI command parameters
-
- move.w AttnFlags(a6),d0
- btst #AFB_68881,d0 ;check for 68881 flag in AttnFlags
- beq 1$ ;skip if not
- lea 2$,a5
- call Supervisor ;do it in supervisor mode
- bra 1$
-
- 2$ clr.l -(sp)
- frestore (sp)+ ;reset the ffp stuff
- rte ;and return
-
- 1$ jsr __main ;call the startup stuff
-
- 4$ addq.l #8,sp ;pop args
- rts ;and return
-
- public _geta4
-
- _geta4: far data
- lea __H1_org+32766,a4
- rts
-
- public __main,__H0_org
-
- dseg
-
- public _SysBase,__savsp ; ,_DOSBase
- public __H1_org,__H1_end,__H2_org,__H2_end
-
- end
-