Fix for PIO driver and its test and deletes build files

1 files changed, 35 insertions, 99 deletions

diff --git a/sw/z80/tests/pio/crt0.s b/sw/z80/tests/pio/crt0.s
index c272f06..eabe06c 100644
--- a/sw/z80/tests/pio/crt0.s
+++ b/sw/z80/tests/pio/crt0.s
@@ -1,104 +1,40 @@
-;--------------------------------------------------------------------------
-;  crt0.s - Generic crt0.s for a Z80
-;
-;  Copyright (C) 2000, Michael Hope
-;
-;  This library is free software; you can redistribute it and/or modify it
-;  under the terms of the GNU General Public License as published by the
-;  Free Software Foundation; either version 2, or (at your option) any
-;  later version.
-;
-;  This library is distributed in the hope that it will be useful,
-;  but WITHOUT ANY WARRANTY; without even the implied warranty of
-;  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;  GNU General Public License for more details.
-;
-;  You should have received a copy of the GNU General Public License 
-;  along with this library; see the file COPYING. If not, write to the
-;  Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
-;   MA 02110-1301, USA.
-;
-;  As a special exception, if you link this library with other files,
-;  some of which are compiled with SDCC, to produce an executable,
-;  this library does not by itself cause the resulting executable to
-;  be covered by the GNU General Public License. This exception does
-;  not however invalidate any other reasons why the executable file
-;   might be covered by the GNU General Public License.
-;--------------------------------------------------------------------------
+    .module crt0
+    .area   _HEADER (ABS)
 
-	.module crt0
-	.globl	_main
+;; Reset vectors
+    .org    0
+    jp  init
 
-	.area	_HEADER (ABS)
-	;; Reset vector
-	.org 	0
-	jp	init
+    .org    0x38 ; the instruction 0xff (not written) resets to this location
+    jp init
 
-	.org	0x08
-	reti
-	.org	0x10
-	reti
-	.org	0x18
-	reti
-	.org	0x20
-	reti
-	.org	0x28
-	reti
-	.org	0x30
-	reti
-	.org	0x38
-	reti
+;; main code
+    .org    0x100
+    .globl  _main
 
-	.org	0x100
 init:
-	;; Set stack pointer directly above top of memory.
-	ld	sp,#0xFFFF
-
-	;; Initialise global variables
-	call	gsinit
-	call	_main
-	jp	    _exit
-
-	;; Ordering of segments for the linker.
-	.area	_HOME
-	.area	_CODE
-	.area	_INITIALIZER
-	.area   _GSINIT
-	.area   _GSFINAL
-
-	.area	_DATA
-	.area	_INITIALIZED
-	.area	_BSEG
-	.area   _BSS
-	.area   _HEAP
-
-	.area   _CODE
-
-__clock::
-	ld	a,#2
-	rst	0x08
-	ret
-
-_exit::
-	;; Exit - special code to the emulator
-	ld	a,#0
-	rst	0x08
-1$:
-	halt
-	jr	1$
-
-	.area   _GSINIT
-gsinit::
-	; ld	bc, #l__INITIALIZER
-	ld	a, b
-	or	a, c
-	jr	Z, gsinit_next
-	; ld	de, #s__INITIALIZED
-	; ld	hl, #s__INITIALIZER
-	ldir
-
-gsinit_next:
-
-	.area   _GSFINAL
-	ret
-
+    ;; Set stack pointer directly above top of memory.
+    ld  sp,#0xffff
+
+    ;; Start of the program
+    call    _main
+    jp      _exit
+
+_exit:
+    halt
+    ; jp  _exit
+
+;; Ordering of segments for the linker.
+    .area   _HOME
+    .area   _CODE
+    .area   _INITIALIZER
+    .area   _GSINIT
+    .area   _GSFINAL
+
+    .area   _DATA
+    .area   _INITIALIZED
+    .area   _BSEG
+    .area   _BSS
+    .area   _HEAP
+
+    .area   _CODE
\ No newline at end of file