z88dk-data 1.8.ds1-10 / usr / share / z88dk / lib / rcmx000_crt0.asm

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/usr/share/z88dk/lib/rcmx000_crt0.asm is in z88dk-data 1.8.ds1-10.

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;       CRT0 for the Rabbit Control Module
;
;       If an error occurs (eg. out if screen) we just drop back to BASIC
;
; - - - - - - -
;
;       $Id: rcmx000_crt0.asm,v 1.4 2007/06/27 20:49:27 dom Exp $
;
; - - - - - - -

	; TODO_KANIN Fix this!!!

	MODULE  rcmx000_crt0

;-------
; Include zcc_opt.def to find out information about us
;-------

        INCLUDE "zcc_opt.def"

;-------
; Simulate unsupported z80 instructions
;-------

        LIB     rcmx_cpd
        LIB     rcmx_cpdr
        LIB     rcmx_cpi
        LIB     rcmx_cpir
        LIB     rcmx_rld
        LIB     rcmx_rrd

;-------
; Some general scope declarations
;-------

        XREF    _main           ;main() is always external to crt0 code

	XDEF	__sendchar	;  Used by stdio
	XDEF    __recvchar
	
        XDEF    cleanup         ;jp'd to by exit()
        XDEF    l_dcal          ;jp(hl)

        XDEF    _std_seed        ;Integer rand() seed

        XDEF    _vfprintf       ;jp to the printf() core

        XDEF    exitsp          ;atexit() variables
        XDEF    exitcount

        XDEF    __sgoioblk      ;stdio info block

       	XDEF	heaplast	;Near malloc heap variables
	XDEF	heapblocks

	org 0
.start
	; On this platform we are king of the road and may use
	; any register for any purpose Wheee!!

	include "#rcmx000_boot.asm"
	jp _main

IF !DEFINED_nostreams
IF DEFINED_ANSIstdio
; Set up the std* stuff so we can be called again
	ld	hl,__sgoioblk+2
	ld	(hl),19	;stdin
	ld	hl,__sgoioblk+6
	ld	(hl),21	;stdout
	ld	hl,__sgoioblk+10
	ld	(hl),21	;stderr
ENDIF
ENDIF
        call    _main	;Call user program
        
.cleanup
;
;       Deallocate memory which has been allocated here!
;
	push	hl
IF !DEFINED_nostreams
IF DEFINED_ANSIstdio
	LIB	closeall
	call	closeall
ENDIF
ENDIF

	pop	bc
.start1	ld	sp,0		;Restore stack to some sane value

	; Puts us back into the monitor
	call 8

.l_dcal	jp	(hl)		;Used for function pointer calls
        jp      (hl)



;-----------
; Define the stdin/out/err area. For the z88 we have two models - the
; classic (kludgey) one and "ANSI" model
;-----------
.__sgoioblk
IF DEFINED_ANSIstdio
	INCLUDE	"#stdio_fp.asm"
ELSE
        defw    -11,-12,-10
ENDIF



;---------------------------------
; Select which printf core we want
;---------------------------------
._vfprintf			
IF DEFINED_floatstdio
	LIB	vfprintf_fp
	jp	vfprintf_fp
ELSE
	IF DEFINED_complexstdio
		LIB	vfprintf_comp
		jp	vfprintf_comp
	ELSE
		IF DEFINED_ministdio
			LIB	vfprintf_mini
			jp	vfprintf_mini
		ENDIF
	ENDIF
ENDIF


;-----------
; Now some variables
;-----------

	; Here is a great place to store temp variables and stuff!!
.acme	defw 4711 			; useless arbitrarily choosen number
	defm  "Small C+ RCM2/3000"&0	;Unnecessary file signature
._std_seed
	defw 0          		; Needed for rand and srand

;-----------------------
; Floating point support
;-----------------------
IF NEED_floatpack
        INCLUDE         "#float.asm"
.fp_seed        defb    $80,$80,0,0,0,0 ;FP seed (unused ATM)
.extra          defs    6               ;FP register
.fa             defs    6               ;FP Accumulator
.fasign         defb    0               ;FP register
ENDIF

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