Move test units to z80/tests, and drivers are now statically linked

Makefiles for the test units were getting messier, so now drivers
(that need to be tested) are statically compiled in their own
folder under z80/drivers.

The kernel makefile and is now broken since everything has been moved.

11 files changed, 759 insertions, 0 deletions

diff --git a/sw/z80/tests/pio/build/crt0.rel b/sw/z80/tests/pio/build/crt0.rel
new file mode 100644
index 0000000..809c0e6
--- /dev/null
+++ b/sw/z80/tests/pio/build/crt0.rel
@@ -0,0 +1,86 @@
+XL2
+H 14 areas 5 global symbols
+M crt0
+S _main Ref0000
+S .__.ABS. Def0000
+A _CODE size A flags 0 addr 0
+S __clock Def0000
+S _exit Def0004
+A _HEADER size 0 flags 8 addr 0
+A _HEADER0 size 3 flags 8 addr 0
+A _HEADER1 size 2 flags 8 addr 8
+A _HEADER2 size 2 flags 8 addr 10
+A _HEADER3 size 2 flags 8 addr 18
+A _HEADER4 size 2 flags 8 addr 20
+A _HEADER5 size 2 flags 8 addr 28
+A _HEADER6 size 2 flags 8 addr 30
+A _HEADER7 size 2 flags 8 addr 38
+A _HEADER8 size C flags 8 addr 100
+A _HOME size 0 flags 0 addr 0
+A _INITIALIZER size 0 flags 0 addr 0
+A _GSINIT size 6 flags 0 addr 0
+S gsinit Def0000
+A _GSFINAL size 1 flags 0 addr 0
+A _DATA size 0 flags 0 addr 0
+A _INITIALIZED size 0 flags 0 addr 0
+A _BSEG size 0 flags 0 addr 0
+A _BSS size 0 flags 0 addr 0
+A _HEAP size 0 flags 0 addr 0
+T 00 00
+R 00 00 02 00
+T 00 00 C3 00 01
+R 00 00 02 00 00 03 0A 00
+T 08 00
+R 00 00 03 00
+T 08 00 ED 4D
+R 00 00 03 00
+T 10 00
+R 00 00 04 00
+T 10 00 ED 4D
+R 00 00 04 00
+T 18 00
+R 00 00 05 00
+T 18 00 ED 4D
+R 00 00 05 00
+T 20 00
+R 00 00 06 00
+T 20 00 ED 4D
+R 00 00 06 00
+T 28 00
+R 00 00 07 00
+T 28 00 ED 4D
+R 00 00 07 00
+T 30 00
+R 00 00 08 00
+T 30 00 ED 4D
+R 00 00 08 00
+T 38 00
+R 00 00 09 00
+T 38 00 ED 4D
+R 00 00 09 00
+T 00 01
+R 00 00 0A 00
+T 00 01
+R 00 00 0A 00
+T 00 01 31 FF FF CD 00 00 CD 00 00 C3 04 00
+R 00 00 0A 00 00 06 0D 00 02 09 00 00 00 0C 00 00
+T 00 00
+R 00 00 00 00
+T 00 00 3E 02 CF C9
+R 00 00 00 00
+T 04 00
+R 00 00 00 00
+T 04 00 3E 00 CF
+R 00 00 00 00
+T 07 00
+R 00 00 00 00
+T 07 00 76 18 FD
+R 00 00 00 00
+T 00 00
+R 00 00 0D 00
+T 00 00 78 B1 28 02 ED B0
+R 00 00 0D 00
+T 06 00
+R 00 00 0D 00
+T 00 00 C9
+R 00 00 0E 00
diff --git a/sw/z80/tests/pio/build/main.asm b/sw/z80/tests/pio/build/main.asm
new file mode 100644
index 0000000..453eead
--- /dev/null
+++ b/sw/z80/tests/pio/build/main.asm
@@ -0,0 +1,80 @@
+;--------------------------------------------------------
+; File Created by SDCC : free open source ANSI-C Compiler
+; Version 3.6.0 #9615 (Linux)
+;--------------------------------------------------------
+	.module main
+	.optsdcc -mz80
+	
+;--------------------------------------------------------
+; Public variables in this module
+;--------------------------------------------------------
+	.globl _main
+	.globl _pio_write
+	.globl _pio_set_mode
+;--------------------------------------------------------
+; special function registers
+;--------------------------------------------------------
+;--------------------------------------------------------
+; ram data
+;--------------------------------------------------------
+	.area _DATA
+;--------------------------------------------------------
+; ram data
+;--------------------------------------------------------
+	.area _INITIALIZED
+;--------------------------------------------------------
+; absolute external ram data
+;--------------------------------------------------------
+	.area _DABS (ABS)
+;--------------------------------------------------------
+; global & static initialisations
+;--------------------------------------------------------
+	.area _HOME
+	.area _GSINIT
+	.area _GSFINAL
+	.area _GSINIT
+;--------------------------------------------------------
+; Home
+;--------------------------------------------------------
+	.area _HOME
+	.area _HOME
+;--------------------------------------------------------
+; code
+;--------------------------------------------------------
+	.area _CODE
+;main.c:3: void main(void)
+;	---------------------------------
+; Function main
+; ---------------------------------
+_main::
+;main.c:7: pio_set_mode(PIO_A, PIO_MODE_BYTE_OUT, 0);
+	xor	a, a
+	push	af
+	inc	sp
+	ld	hl,#0x0001
+	push	hl
+	ld	l, #0x00
+	push	hl
+	call	_pio_set_mode
+	pop	af
+	pop	af
+	inc	sp
+;main.c:9: while (1) {
+	ld	c,#0x00
+00102$:
+;main.c:10: pio_write(PIO_A, j++);
+	ld	b,c
+	inc	c
+	push	bc
+	push	bc
+	inc	sp
+	ld	hl,#0x0000
+	push	hl
+	call	_pio_write
+	pop	af
+	inc	sp
+	pop	bc
+	jr	00102$
+	.area _CODE
+	.area _INITIALIZER
+	.area _CABS (ABS)
diff --git a/sw/z80/tests/pio/build/main.lst b/sw/z80/tests/pio/build/main.lst
new file mode 100644
index 0000000..4a1a872
--- /dev/null
+++ b/sw/z80/tests/pio/build/main.lst
@@ -0,0 +1,80 @@
+                              1 ;--------------------------------------------------------
+                              2 ; File Created by SDCC : free open source ANSI-C Compiler
+                              3 ; Version 3.6.0 #9615 (Linux)
+                              4 ;--------------------------------------------------------
+                              5 	.module main
+                              6 	.optsdcc -mz80
+                              7 	
+                              8 ;--------------------------------------------------------
+                              9 ; Public variables in this module
+                             10 ;--------------------------------------------------------
+                             11 	.globl _main
+                             12 	.globl _pio_write
+                             13 	.globl _pio_set_mode
+                             14 ;--------------------------------------------------------
+                             15 ; special function registers
+                             16 ;--------------------------------------------------------
+                             17 ;--------------------------------------------------------
+                             18 ; ram data
+                             19 ;--------------------------------------------------------
+                             20 	.area _DATA
+                             21 ;--------------------------------------------------------
+                             22 ; ram data
+                             23 ;--------------------------------------------------------
+                             24 	.area _INITIALIZED
+                             25 ;--------------------------------------------------------
+                             26 ; absolute external ram data
+                             27 ;--------------------------------------------------------
+                             28 	.area _DABS (ABS)
+                             29 ;--------------------------------------------------------
+                             30 ; global & static initialisations
+                             31 ;--------------------------------------------------------
+                             32 	.area _HOME
+                             33 	.area _GSINIT
+                             34 	.area _GSFINAL
+                             35 	.area _GSINIT
+                             36 ;--------------------------------------------------------
+                             37 ; Home
+                             38 ;--------------------------------------------------------
+                             39 	.area _HOME
+                             40 	.area _HOME
+                             41 ;--------------------------------------------------------
+                             42 ; code
+                             43 ;--------------------------------------------------------
+                             44 	.area _CODE
+                             45 ;main.c:3: void main(void)
+                             46 ;	---------------------------------
+                             47 ; Function main
+                             48 ; ---------------------------------
+   0000                      49 _main::
+                             50 ;main.c:7: pio_set_mode(PIO_A, PIO_MODE_BYTE_OUT, 0);
+   0000 AF            [ 4]   51 	xor	a, a
+   0001 F5            [11]   52 	push	af
+   0002 33            [ 6]   53 	inc	sp
+   0003 21 01 00      [10]   54 	ld	hl,#0x0001
+   0006 E5            [11]   55 	push	hl
+   0007 2E 00         [ 7]   56 	ld	l, #0x00
+   0009 E5            [11]   57 	push	hl
+   000A CDr00r00      [17]   58 	call	_pio_set_mode
+   000D F1            [10]   59 	pop	af
+   000E F1            [10]   60 	pop	af
+   000F 33            [ 6]   61 	inc	sp
+                             62 ;main.c:9: while (1) {
+   0010 0E 00         [ 7]   63 	ld	c,#0x00
+   0012                      64 00102$:
+                             65 ;main.c:10: pio_write(PIO_A, j++);
+   0012 41            [ 4]   66 	ld	b,c
+   0013 0C            [ 4]   67 	inc	c
+   0014 C5            [11]   68 	push	bc
+   0015 C5            [11]   69 	push	bc
+   0016 33            [ 6]   70 	inc	sp
+   0017 21 00 00      [10]   71 	ld	hl,#0x0000
+   001A E5            [11]   72 	push	hl
+   001B CDr00r00      [17]   73 	call	_pio_write
+   001E F1            [10]   74 	pop	af
+   001F 33            [ 6]   75 	inc	sp
+   0020 C1            [10]   76 	pop	bc
+   0021 18 EF         [12]   77 	jr	00102$
+                             78 	.area _CODE
+                             79 	.area _INITIALIZER
+                             80 	.area _CABS (ABS)
diff --git a/sw/z80/tests/pio/build/main.rel b/sw/z80/tests/pio/build/main.rel
new file mode 100644
index 0000000..bc2bd98
--- /dev/null
+++ b/sw/z80/tests/pio/build/main.rel
@@ -0,0 +1,29 @@
+XL2
+H 9 areas 4 global symbols
+M main
+O -mz80
+S _pio_set_mode Ref0000
+S .__.ABS. Def0000
+S _pio_write Ref0000
+A _CODE size 23 flags 0 addr 0
+S _main Def0000
+A _DATA size 0 flags 0 addr 0
+A _INITIALIZED size 0 flags 0 addr 0
+A _DABS size 0 flags 8 addr 0
+A _HOME size 0 flags 0 addr 0
+A _GSINIT size 0 flags 0 addr 0
+A _GSFINAL size 0 flags 0 addr 0
+A _INITIALIZER size 0 flags 0 addr 0
+A _CABS size 0 flags 8 addr 0
+T 00 00
+R 00 00 00 00
+T 00 00 AF F5 33 21 01 00 E5 2E 00 E5 CD 00 00 F1
+R 00 00 00 00 02 0D 00 00
+T 0E 00 F1 33 0E 00
+R 00 00 00 00
+T 12 00
+R 00 00 00 00
+T 12 00 41 0C C5 C5 33 21 00 00 E5 CD 00 00 F1 33
+R 00 00 00 00 02 0C 02 00
+T 20 00 C1 18 EF
+R 00 00 00 00
diff --git a/sw/z80/tests/pio/build/main.sym b/sw/z80/tests/pio/build/main.sym
new file mode 100644
index 0000000..08d28a3
--- /dev/null
+++ b/sw/z80/tests/pio/build/main.sym
@@ -0,0 +1,29 @@
+ASxxxx Assembler V02.00 + NoICE + SDCC mods  (Zilog Z80 / Hitachi HD64180), page 1.
+Hexadecimal [16-Bits]
+
+Symbol Table
+
+    .__.$$$.                                                    =  2710 L
+    .__.ABS.                                                    =  0000 G
+    .__.CPU.                                                    =  0000 L
+    .__.H$L.                                                    =  0000 L
+  0 _main                                                          0000 GR
+    _pio_set_mode                                                  **** GX
+    _pio_write                                                     **** GX
+
+
+ASxxxx Assembler V02.00 + NoICE + SDCC mods  (Zilog Z80 / Hitachi HD64180), page 2.
+Hexadecimal [16-Bits]
+
+Area Table
+
+   0 _CODE                                      size   23   flags    0
+   1 _DATA                                      size    0   flags    0
+   2 _INITIALIZED                               size    0   flags    0
+   3 _DABS                                      size    0   flags    8
+   4 _HOME                                      size    0   flags    0
+   5 _GSINIT                                    size    0   flags    0
+   6 _GSFINAL                                   size    0   flags    0
+   7 _INITIALIZER                               size    0   flags    0
+   8 _CABS                                      size    0   flags    8
+
diff --git a/sw/z80/tests/pio/build/pio_test.lk b/sw/z80/tests/pio/build/pio_test.lk
new file mode 100644
index 0000000..20c32cc
--- /dev/null
+++ b/sw/z80/tests/pio/build/pio_test.lk
@@ -0,0 +1,13 @@
+-mjwx
+-i build/pio_test.hex
+-b _CODE = 0x0800
+-b _DATA = 0x2000
+-k ../../drivers/build/
+-k /usr/libexec/../share/sdcc/lib/z80
+-k /usr/share/sdcc/lib/z80
+-l drivers.a
+-l z80
+build/crt0.rel
+build/main.rel
+
+-e
diff --git a/sw/z80/tests/pio/build/pio_test.map b/sw/z80/tests/pio/build/pio_test.map
new file mode 100644
index 0000000..e91ef69
--- /dev/null
+++ b/sw/z80/tests/pio/build/pio_test.map
@@ -0,0 +1,213 @@
+ASxxxx Linker V03.00 + NoICE + sdld,  page 1.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+.  .ABS.                            00000000    00000000 =           0. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+     00000000  .__.ABS.                           pio
+     00000000  l__BSEG                         
+     00000000  l__BSS                          
+     00000000  l__CABS                         
+     00000000  l__DABS                         
+     00000000  l__DATA                         
+     00000000  l__HEADER                       
+     00000000  l__HEAP                         
+     00000000  l__HOME                         
+     00000000  s__CABS                         
+     00000000  s__DABS                         
+     00000000  s__HEADER                       
+     00000000  s__HEADER0                      
+     00000000  s__HEADER1                      
+     00000000  s__HEADER2                      
+     00000000  s__HEADER3                      
+     00000000  s__HEADER4                      
+     00000000  s__HEADER5                      
+     00000000  s__HEADER6                      
+     00000000  s__HEADER7                      
+     00000000  s__HEADER8                      
+     00000001  l__GSFINAL                      
+     00000002  l__HEADER1                      
+     00000002  l__HEADER2                      
+     00000002  l__HEADER3                      
+     00000002  l__HEADER4                      
+     00000002  l__HEADER5                      
+     00000002  l__HEADER6                      
+     00000002  l__HEADER7                      
+     00000003  l__HEADER0                      
+     00000004  l__INITIALIZED                  
+     00000004  l__INITIALIZER                  
+     00000006  l__GSINIT                       
+     0000000C  l__HEADER8                      
+     000000FD  l__CODE                         
+     00000800  s__CODE                         
+     000008FD  s__HOME                         
+     000008FD  s__INITIALIZER                  
+     00000901  s__GSINIT                       
+     00000907  s__GSFINAL                      
+     00002000  s__DATA                         
+     00002000  s__INITIALIZED                  
+     00002004  s__BSEG                         
+     00002004  s__BSS                          
+     00002004  s__HEAP                         
+ASxxxx Linker V03.00 + NoICE + sdld,  page 2.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_CODE                               00000800    000000FD =         253. bytes (REL,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+     00000800  __clock                            crt0
+     00000804  _exit                              crt0
+     0000080A  _main                              main
+     0000082D  __pio_data                         pio
+     00000847  __pio_control                      pio
+     00000861  _pio_set_mode                      pio
+     0000089D  _pio_set_interrupts                pio
+     000008B0  _pio_set_interrupts_mask           pio
+     000008D7  _pio_read                          pio
+     000008ED  _pio_write                         pio
+
+ASxxxx Linker V03.00 + NoICE + sdld,  page 3.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER0                            00000000    00000003 =           3. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 4.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER1                            00000000    00000002 =           2. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 5.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER2                            00000000    00000002 =           2. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 6.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER3                            00000000    00000002 =           2. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 7.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER4                            00000000    00000002 =           2. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 8.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER5                            00000000    00000002 =           2. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 9.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER6                            00000000    00000002 =           2. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 10.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER7                            00000000    00000002 =           2. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 11.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_HEADER8                            00000000    0000000C =          12. bytes (ABS,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 12.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_INITIALIZER                        000008FD    00000004 =           4. bytes (REL,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 13.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_GSINIT                             00000901    00000006 =           6. bytes (REL,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+     00000901  gsinit                             crt0
+
+ASxxxx Linker V03.00 + NoICE + sdld,  page 14.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_GSFINAL                            00000907    00000001 =           1. bytes (REL,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 15.
+Hexadecimal  [32-Bits]
+
+Area                                    Addr        Size        Decimal Bytes (Attributes)
+--------------------------------        ----        ----        ------- ----- ------------
+_INITIALIZED                        00002000    00000004 =           4. bytes (REL,CON)
+
+      Value  Global                              Global Defined In Module
+      -----  --------------------------------   ------------------------
+ASxxxx Linker V03.00 + NoICE + sdld,  page 16.
+
+Files Linked                              [ module(s) ]
+
+build/crt0.rel                            [ crt0 ]
+build/main.rel                            [ main ]
+
+
+Libraries Linked                          [ object file ]
+
+../../drivers/build/drivers.a             [ pio.rel ]
+
+ASxxxx Linker V03.00 + NoICE + sdld,  page 17.
+
+User Base Address Definitions
+
+_CODE = 0x0800
+_DATA = 0x2000
+
+
\ No newline at end of file
diff --git a/sw/z80/tests/pio/build/pio_test.noi b/sw/z80/tests/pio/build/pio_test.noi
new file mode 100644
index 0000000..3ddefe7
--- /dev/null
+++ b/sw/z80/tests/pio/build/pio_test.noi
@@ -0,0 +1,57 @@
+DEF .__.ABS. 0x0
+DEF l__BSEG 0x0
+DEF l__BSS 0x0
+DEF l__CABS 0x0
+DEF l__DABS 0x0
+DEF l__DATA 0x0
+DEF l__HEADER 0x0
+DEF l__HEAP 0x0
+DEF l__HOME 0x0
+DEF s__CABS 0x0
+DEF s__DABS 0x0
+DEF s__HEADER 0x0
+DEF s__HEADER0 0x0
+DEF s__HEADER1 0x0
+DEF s__HEADER2 0x0
+DEF s__HEADER3 0x0
+DEF s__HEADER4 0x0
+DEF s__HEADER5 0x0
+DEF s__HEADER6 0x0
+DEF s__HEADER7 0x0
+DEF s__HEADER8 0x0
+DEF l__GSFINAL 0x1
+DEF l__HEADER1 0x2
+DEF l__HEADER2 0x2
+DEF l__HEADER3 0x2
+DEF l__HEADER4 0x2
+DEF l__HEADER5 0x2
+DEF l__HEADER6 0x2
+DEF l__HEADER7 0x2
+DEF l__HEADER0 0x3
+DEF l__INITIALIZED 0x4
+DEF l__INITIALIZER 0x4
+DEF l__GSINIT 0x6
+DEF l__HEADER8 0xC
+DEF l__CODE 0xFD
+DEF s__CODE 0x800
+DEF s__HOME 0x8FD
+DEF s__INITIALIZER 0x8FD
+DEF s__GSINIT 0x901
+DEF s__GSFINAL 0x907
+DEF s__DATA 0x2000
+DEF s__INITIALIZED 0x2000
+DEF s__BSEG 0x2004
+DEF s__BSS 0x2004
+DEF s__HEAP 0x2004
+DEF __clock 0x800
+DEF _exit 0x804
+DEF _main 0x80A
+DEF __pio_data 0x82D
+DEF __pio_control 0x847
+DEF _pio_set_mode 0x861
+DEF _pio_set_interrupts 0x89D
+DEF _pio_set_interrupts_mask 0x8B0
+DEF _pio_read 0x8D7
+DEF _pio_write 0x8ED
+DEF gsinit 0x901
+LOAD build/pio_test.ihx
diff --git a/sw/z80/tests/pio/crt0.s b/sw/z80/tests/pio/crt0.s
new file mode 100644
index 0000000..c272f06
--- /dev/null
+++ b/sw/z80/tests/pio/crt0.s
@@ -0,0 +1,104 @@
+;--------------------------------------------------------------------------
+;  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
+	.globl	_main
+
+	.area	_HEADER (ABS)
+	;; Reset vector
+	.org 	0
+	jp	init
+
+	.org	0x08
+	reti
+	.org	0x10
+	reti
+	.org	0x18
+	reti
+	.org	0x20
+	reti
+	.org	0x28
+	reti
+	.org	0x30
+	reti
+	.org	0x38
+	reti
+
+	.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
+
diff --git a/sw/z80/tests/pio/main.c b/sw/z80/tests/pio/main.c
new file mode 100644
index 0000000..4b0bcdb
--- /dev/null
+++ b/sw/z80/tests/pio/main.c
@@ -0,0 +1,12 @@
+#include "pio.h"
+
+void main(void)
+{
+    uint8_t j = 0;
+
+    pio_set_mode(PIO_A, PIO_MODE_BYTE_OUT, 0);
+
+    while (1) {
+        pio_write(PIO_A, j++);
+    }
+}
diff --git a/sw/z80/tests/pio/makefile b/sw/z80/tests/pio/makefile
new file mode 100644
index 0000000..bd9d5bf
--- /dev/null
+++ b/sw/z80/tests/pio/makefile
@@ -0,0 +1,56 @@
+####
+# source code settings
+#
+NAME := pio_test
+ 
+CSOURCES 	:= $(wildcard *.c)
+
+OBJECTS 	:= $(patsubst %.c,build/%.rel,$(CSOURCES))
+HEXFILE		:= build/$(NAME).hex
+BINARY  	:= build/$(NAME).bin
+
+### 
+# compiler settings
+#
+CC 		:= sdcc
+
+CFLAGS	:= -mz80 \
+			-pedantic \
+			-I . \
+			-I ../../arch \
+			-I ../../drivers/include \
+			-DDEBUG
+
+LDFLAGS := -mz80 \
+			-L ../../drivers/build/ \
+			-l drivers.a \
+			--no-std-crt0 build/crt0.rel \
+			--code-loc 0x0800 \
+			--data-loc 0x2000
+
+.PHONY: dirs dis clean
+all: $(BINARY)
+
+# build binary
+$(BINARY): $(OBJECTS) dirs
+	$(CC) $(LDFLAGS) $(OBJECTS) -o $(HEXFILE)
+	makebin -s 8192 $(HEXFILE) $(BINARY)
+
+$(OBJECTS): build/%.rel : %.c $(CSOURCES) dirs build/crt0.rel
+	@printf "\n"
+	$(CC) $(CFLAGS) -c $< -o $@
+
+build/crt0.rel: crt0.s
+	sdasz80 -o $<
+	@mv crt0.rel build/
+
+dirs:
+	mkdir -p build
+
+dis: $(BINARY)
+	@# z80dasm -a -l -g 0h $< -o build/$(OSNAME).s
+	dz80 -b -n $<
+
+clean:
+	- rm -rd build/*
+	- rm crt0.rel