Move sw to sw-old and hw to hw-altium, add kicad files

21 files changed, 0 insertions, 1467 deletions

diff --git a/sw/z80/kernel/crt0.s b/sw/z80/kernel/crt0.s
deleted file mode 100644
index 00c7da1..0000000
--- a/sw/z80/kernel/crt0.s
+++ /dev/null
@@ -1,103 +0,0 @@
-;--------------------------------------------------------------------------
-;  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	_kmain
-
-	.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	_kmain
-	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/kernel/fs/fd.c b/sw/z80/kernel/fs/fd.c
deleted file mode 100644
index 96603ad..0000000
--- a/sw/z80/kernel/fs/fd.c
+++ /dev/null
@@ -1,255 +0,0 @@
-#include "fs/fd.h"
-#include "fs/fdop.h"
-#include "fs/fs.h"
-
-/* from fd.h */
-struct file_desc fd_table[FD_TABLE_SIZE];
-struct uint8_t  fd_bmap[FD_TABLE_SIZE / 8];
-
-/* File descriptors implementation */
-
-int8_t open(const char *path, uint8_t flags)
-{
-    // TODO
-    return 0; 
-}
-
-size_t ls(int8_t fd, struct dirent *buf, uint8_t all)
-{
-    // TODO
-    return 0; 
-}
-
-size_t find(int8_t fd, struct dirent *buf, const char *name)
-{
-    // TODO
-    return 0; 
-}
-
-int8_t mkdir(int8_t fd, const char *name)
-{
-    // TODO
-    return 0; 
-}
-
-int8_t touch(int8_t fd, const char *name)
-{
-    // TODO
-    return 0; 
-}
-
-int8_t ln(int8_t fd, const char *name)
-{
-    // TODO
-    return 0; 
-}
-
-int8_t seek(int8_t fd, fsize_t pos)
-{
-    // TODO
-    return 0; 
-}
-
-size_t readline(int8_t fd, char *buf, char term)
-{
-    // TODO
-    return 0; 
-}
-
-int8_t print(int8_t fd, const char *str)
-{
-    // TODO
-    return 0; 
-}
-
-size_t read(int8_t fd, void *buf, size_t n)
-{
-    // TODO
-    return 0; 
-}
-
-int8_t write(int8_t fd, const void *buf, size_t n)
-{
-    // TODO
-    return 0; 
-}
-
-void close(int8_t fd)
-{
-    // TODO
-    return 0; 
-}
-
-/* Set of file descriptors operations */
-/* Determines if to use the serial interface or the address space */
-
-/* Address space section */
-
-/* File functions */
-
-size_t as_readline(inode_t inode, fsize_t seek, char *buf, char term)
-{
-    // TODO
-    return 0;
-}
-
-size_t as_print(inode_t inode, fsize_t seek, const char *str)
-{
-    // TODO
-    return 0;
-}
-
-size_t as_append(inode_t inode, fsize_t *seek_ptr, const char *str)
-{
-    // TODO
-    return 0;
-}
-
-size_t as_read(inode_t inode, fsize_t seek, void *buf, size_t n)
-{
-    // TODO
-    return 0;
-}
-
-size_t as_write(inode_t inode, fsize_t seek, const void *buf, size_t n)
-{
-    // TODO
-    return 0;
-}
-
-size_t as_bin_append(inode_t inode, fsize_t *seek_ptr, const void *buf, size_t
-n)
-{
-    // TODO
-    return 0;
-}
-
-/* Directory functions */
-
-size_t as_ls(inode_t inode, struct dirent *buf, uint8_t all)
-{
-    // TODO
-    return 0;
-}
-
-size_t as_find(inode_t inode, struct dirent *buf, const char *name)
-{
-    // TODO
-    return 0;
-}
-
-int8_t as_mkdir(inode_t inode, const char *name)
-{
-    // TODO
-    return 0;
-}
-
-int8_t as_rmdir(inode_t inode, const char *name)
-{
-    // TODO
-    return 0;
-}
-
-int8_t as_touch(inode_t inode, const char *name)
-{
-    // TODO
-    return 0;
-}
-
-int8_t as_rm(inode_t inode, const char *name)
-{
-    // TODO
-    return 0;
-}
-
-int8_t as_ln(inode_t inode, const char *path, const char *name)
-{
-    // TODO
-    return 0;
-}
-
-/* Serial Space section */
-/* Warning, it doesn't switch to the right driver */
-
-/* File functions */
-
-size_t ss_readline(inode_t inode, fsize_t seek, char *buf, char term)
-{
-    // TODO
-    return 0;
-}
-
-size_t ss_print(inode_t inode, fsize_t seek, const char *str)
-{
-    // TODO
-    return 0;
-}
-
-size_t ss_append(inode_t inode, fsize_t *seek_ptr, const char *str)
-{
-    // TODO
-    return 0;
-}
-
-size_t ss_read(inode_t inode, fsize_t seek, void *buf, size_t n)
-{
-    // TODO
-    return 0;
-}
-
-size_t ss_write(inode_t inode, fsize_t seek, const void *buf, size_t n)
-{
-    // TODO
-    return 0;
-}
-
-size_t ss_bin_append(inode_t inode, fsize_t *seek_ptr, const void *buf, size_t
-n)
-{
-    // TODO
-    return 0;
-}
-
-/* Directory functions */
-
-size_t ss_ls(inode_t inode, struct dirent *buf, uint8_t all)
-{
-    // TODO
-    return 0;
-}
-
-size_t ss_find(inode_t inode, struct dirent *buf, const char *name)
-{
-    // TODO
-    return 0;
-}
-
-int8_t ss_mkdir(inode_t inode, const char *name)
-{
-    // TODO
-    return 0;
-}
-
-int8_t ss_rmdir(inode_t inode, const char *name)
-{
-    // TODO
-    return 0;
-}
-
-int8_t ss_touch(inode_t inode, const char *name)
-{
-    // TODO
-    return 0;
-}
-
-int8_t ss_rm(inode_t inode, const char *name)
-{
-    // TODO
-    return 0;
-}
-
-int8_t ss_ln(inode_t, const char *path, const char *name)
-{
-    // TODO
-    return 0;
-}
diff --git a/sw/z80/kernel/fs/fs.c b/sw/z80/kernel/fs/fs.c
deleted file mode 100644
index 584f934..0000000
--- a/sw/z80/kernel/fs/fs.c
+++ /dev/null
@@ -1,236 +0,0 @@
-#include "fs/fs.h"
-#include "fs/users.h"
-#include "fs/dev.h"
-
-/* from users.h */
-struct fs_user c_user;
-
-/* from inode.h */
-inode_t c_inode;
-
-struct fs_dev devices[FS_MOUNT_LIMIT];
-
-/* filesystem basic implementation */
-
-devsize_t fs_block(blk_t block)
-{
-    // TODO
-    return 0;
-}
-
-devsize_t fs_inode(struct fs_inode *buf)
-{
-    struct fs_superblock * sb;
-    devsize_t seek;
-
-    if (FS_USE_ROM(c_inode))
-    {
-        seek = FS_ROM_SPACE;
-        sb = (struct fs_superblock*) seek; 
-
-    } else {
-
-        seek = 0;
-
-        if (c_inode.dev > 0x7)
-            panic("Invalid device");    // TODO, still to implement
-
-        sb = &devices[c_inode.dev].superblock; 
-    }
-
-    if (c_inode.inode >= sb->imap_size)
-    {
-        // TODO, set errno
-        return 0;   // inode doesn't exist
-    }
-
-    seek += sizeof(struct fs_superblock) + 
-            sizeof(struct fs_inode) * c_inode.inode;
-
-    if (FS_USE_ROM(c_inode))
-        *buf = *(struct fs_inode*)seek;
-    else
-    {
-        /* set sio port */
-        sio_port = devices[c_inode.dev].port_no;
-        sio_seek = seek;
-
-        if (sio_read((void *)buf, INODE_META_SIZE) < INODE_META_SIZE)
-        {
-            // TODO, set errno
-            return 0;   // cannot read to device
-        }
-    }
-
-    return seek + INODE_META_SIZE;
-}
-
-/* from fd.h */
-int8_t __fd_new()
-{
-    int8_t fd;
-    for (int8_t = 0; i < FD_TABLE_SIZE / 8; i++)
-    {
-        for (uint8_t bit = 0x80, j = 0; bit > 0; bit >>= 1, j++)
-        {
-            if (!(bit & fd_bmap[i]))
-                return i * 8 + j;
-        }
-    }
-
-    return -1;
-}
-
-/* from fd.h */
-int8_t __open_c_inode(uint8_t flags)
-{
-    /* read meta data */
-    struct fs_inode inode;
-
-    /* init file_desc buffer */
-    struct file_desc desc = {c_inode, 0};
-    
-    desc.begin = fs_inode(&inode);
-    
-    /* bind operations */
-
-    if (flags & OPEN_DIR)
-    {
-        /* dir handler */
-
-        if (inode.type == INODE_TYPE_DIR)
-        {
-            /* bind dir functions */
-            if (FS_USE_ROM(c_inode))
-                /* bind address space functions */
-                FD_BIND_AS_DIR(desc.opers)
-            else
-                /* bind serial space functions */
-                FD_BIND_SS_DIR(desc.opers)
-
-        } else {
-
-            // TODO, set errno
-            return -1;  // not a directory
-        }
-
-    } else if (flags & OPEN_LINK) {
-        
-        /* link handler */
-
-        if (inode.type == INODE_TYPE_LINK)
-        {
-            if (FS_USE_ROM(c_inode))
-                FD_BIND_AS_FILE(desc.opers, flags)
-            else
-                FD_BIND_SS_FILE(desc.opers, flags)
-
-            if (flags & OPEN_ERASE)
-                /* empty file content */
-                __inode_empty(desc.begin);
-
-        } else {
-            
-            // TODO, set errno
-            return -1;  // not a link
-        }
-
-    } else {
-
-        /* file */
-
-        if (inode.type == INODE_TYPE_FILE)
-            ;   // do nothing
-        else if (inode.type == INODE_TYPE_SPECIAL) {
-            
-            // TODO, bind special callbacks
-            
-        } else {
-
-            // TODO, set errno
-            return -1;
-        }
-
-        /* bind operations */
-
-        if (FS_USE_ROM(c_inode))
-        {
-            if (flags & OPEN_BIN)
-                FD_BIND_AS_BINFILE(desc.opers, flags)
-            else
-                FD_BIND_AS_FILE(desc.opers, flags) 
-
-        } else {
-            
-            if (flags & OPEN_BIN)
-                FD_BIND_SS_BINFILE(desc.opers, flags)
-            else
-                FD_BIND_SS_FILE(desc.opers, flags)
-        }
-    }
-
-    /* find a free fd space */
-    
-    int8_t fd = __fd_new();
-
-    if (fd < 0)
-    {
-        // TODO, set errno, fd not available
-
-    } else
-        fd_table[fd] = desc; // copy buffer into the table
-
-    return fd;
-}
-
-inode_t fs_rec_path(const char *path);
-
-inode_t fs_parse_path(const char *path)
-{
-    inode_t ino, cwd = c_inode;
-
-    switch (path[0])
-    {
-        case '0':
-        FS_INODE_NULL(ino)
-        return ino;
-
-        case '/':
-        FS_INODE_ROOT(ino)
-        c_inode = ino;       // set cwd to root
-        path++;
-        break;
-
-        case '~':
-
-        if (path[1] = '/')
-        {
-            c_inode.dev = FS_DEV_ROM;
-            c_inode.inode = c_user.home;  // set cwd to home
-            path += 2;
-        }
-            
-        break;
-   }
-
-   ino = fs_rec_path(path);
-   c_inode = cwd;
-   return ino;
-}
-
-inode_t fs_rec_path(const char *path)
-{
-    devsize_t inode = fs_inode(c_inode.inode); 
-    inode_t rel;
-
-    if (!inode)   // if not exists
-    {
-        FS_INODE_NULL(rel)
-        return rel;
-    }
-
-    // TODO, check if dir or file
-    // TODO, if dir, find name
-    // TODO, set fs_cwd to new inode
-    // TODO, recall fs_rec_path
-}
diff --git a/sw/z80/kernel/include/devices.h b/sw/z80/kernel/include/devices.h
deleted file mode 100644
index a846f9b..0000000
--- a/sw/z80/kernel/include/devices.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef __DEVICES_H__
-#define __DEVICES_H__
-
-#define ADDR_DEV_ROM_L      0x0000
-#define ADDR_DEV_ROM_H      0x2000
-
-#define ADDR_DEV_USART      0x4000
-#define ADDR_DEV_CTC        0x4100
-#define ADDR_DEV_PIO        0x4200
-
-#define ADDR_DEV_MMU
-
-#define ADDR_DEV_RAM        0x8000
-
-#endif
diff --git a/sw/z80/kernel/include/errno.h b/sw/z80/kernel/include/errno.h
deleted file mode 100644
index 7632269..0000000
--- a/sw/z80/kernel/include/errno.h
+++ /dev/null
@@ -1,35 +0,0 @@
-#ifndef ERRNO_H
-#define ERRNO_H
-
-extern int errno;
-
-#define EPERM       1       /* Operation not permitted */
-#define ENOENT      2       /* No such file or directory */
-#define ESRCH       3       /* No such process */
-#define EINTR       4       /* Interrupted system call */
-#define EIO         5       /* Input/output error */
-#define ENXIO       6       /* Device not configured */
-#define E2BIG       7       /* Argument list too long */
-#define ENOEXEC     8       /* Exec format error */
-#define EBADF       9       /* Bad file descriptor */
-#define ECHILD      10      /* No child processes */
-#define EDEADLK     11      /* Resource deadlock avoided */
-
-#define ENOMEM      12      /* Cannot allocate memory */
-#define EACCES      13      /* Permission denied */
-#define EFAULT      14      /* Bad address */
-
-#define ENOTBLK     15      /* Block device required */
-#define EBUSY       16      /* Device busy */
-#define EEXIST      17      /* File exists */
-
-#define EXDEV       18      /* Cross-device link */
-#define ENODEV      19      /* Operation not supported by device */
-#define ENOTDIR     20      /* Not a directory */
-#define EISDIR      21      /* Is a directory */
-#define EINVAL      22      /* Invalid argument */
-#define ENFILE      23      /* Too many open files in system */
-#define EMFILE      24      /* Too many open files */
-#define ENOTTY      25      /* Inappropriate ioctl for device */
-
-#endif
diff --git a/sw/z80/kernel/include/fs/dev.h b/sw/z80/kernel/include/fs/dev.h
deleted file mode 100644
index 8e550f3..0000000
--- a/sw/z80/kernel/include/fs/dev.h
+++ /dev/null
@@ -1,29 +0,0 @@
-#ifndef DEV_H
-#define DEV_H
-
-#include "types.h"
-
-#define FS_MOUNT_LIMIT 16
-
-struct fs_superblock
-{
-    uint8_t     magic;           // identifier
-
-    size_t      blk_size;           // size of a single block
-    size_t      imap_size;          // quantity of inodes
-    size_t      dmap_size;          // quantity of blocks
-};
-
-struct fs_dev
-{
-    uint                    enabled :1;     // in use
-    uint                    port_no :3;     // serial port number
-    uint                            :4; 
-    inode_t                 inode;          // dir mounted
-    struct fs_superblock    superblock;     // block informations
-};
-
-/* list of devices */ 
-extern struct fs_dev devices[FS_MOUNT_LIMIT];
-
-#endif
diff --git a/sw/z80/kernel/include/fs/dirent.h b/sw/z80/kernel/include/fs/dirent.h
deleted file mode 100644
index 2fd224a..0000000
--- a/sw/z80/kernel/include/fs/dirent.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef __DIRENT_H__
-#define __DIRENT_H__
-
-#include "types.h"
-
-struct dirent
-{
-    ino_t       inode;       // inode referred
-    uint8_t     name_size;    // size of the name
-    char        name[];         // name of the referred inode
-};
-
-/* if inode is FS_INO_NULL, then the dirent is a memory leak */
-/* Warning: dirent leaks are generated by rm or rmdir operations */
-/* Filesystem must be periodically checked and cleaned */
-
-#endif  // __DIRENT_H__
diff --git a/sw/z80/kernel/include/fs/fd.h b/sw/z80/kernel/include/fs/fd.h
deleted file mode 100644
index d2fea2a..0000000
--- a/sw/z80/kernel/include/fs/fd.h
+++ /dev/null
@@ -1,102 +0,0 @@
-#ifndef __FD_H__
-#define __FD_H__
-
-#include "types.h"
-
-#define FD_MAX 32
-
-#define OPEN_READ       0x1
-#define OPEN_WRITE      0x2 
-#define OPEN_BIN        0x4
-#define OPEN_APPEND     0x8
-#define OPEN_ERASE      0x10
-#define OPEN_DIR        0x20
-#define OPEN_LINK       0x40
-
-#define LS_ALL       0x1
-
-/* declare dirent, not include */
-#ifndef __DIRENT_H__
-struct dirent;
-#endif
-
-/* set of operations callback for fd */
-struct fd_operations
-{
-    size_t (*readline)(inode_t, fsize_t, char *, char term);
-    size_t (*print)(inode_t, fsize_t, const char *);
-    size_t (*append)(inode_t, fsize_t*, const char *);
-
-    size_t (*read)(inode_t, fsize_t, void *, size_t);
-    size_t (*write)(inode_t, fsize_t, const void *, size_t);
-    size_t (*bin_append)(inode_t, fsize_t*, const void *, size_t);
-
-    size_t (*ls)(inode_t, struct dirent *, uint8_t);
-    size_t (*find)(inode_t, struct dirent *, const char *);
-    int8_t (*mkdir)(inode_t, const char *);
-    int8_t (*rmdir)(inode_t, const char *);
-    int8_t (*touch)(inode_t, const char *);
-    int8_t (*rm)(inode_t, const char *);
-    int8_t (*ln)(inode_t, const char *, const char *);
-
-    int8_t (*special)(inode_t, void *, size_t);
-};
-
-/* file descriptor */
-struct file_desc
-{
-    inode_t                 inode;  // inode pointed
-    fsize_t                 seek;   // virtual seek
-    devsize_t               begin;  // beginning of blocks
-    struct fd_operations    opers;  // bound operations
-};
-
-/* bitmap of used file descriptors */
-extern struct uint8_t fd_bmap[FD_TABLE_SIZE / 8];
-
-/* table of file descriptors */
-extern struct file_desc fd_table[FD_TABLE_SIZE];
-
-/* returns a free file descriptor */
-int8_t __fd_new();
-
-/* opens a file streaming of the cwd */
-int8_t __open_c_inode(uint8_t flags);
-
-/* opens a file streaming by a path */
-int8_t open(const char *path, uint8_t flags); 
-
-/* list content of directory */
-size_t ls(int8_t fd, struct dirent *buf, uint8_t all);
-
-/* find name through the directory entries */
-size_t find(int8_t fd, struct dirent *buf, const char *name);
-
-/* creates a new directory inside fd with the specified name */
-int8_t mkdir(int8_t fd, const char *name);
-
-/* creates a new file inside fd with the specified name */
-int8_t touch(int8_t fd, const char *name);
-
-/* creates a new symlink inside fd with the specified name */
-int8_t ln(int8_t fd, const char *name);
-
-/* change virtual seek position of the fd */
-int8_t seek(int8_t fd, fsize_t pos);
-
-/* reads a string from the fd until the terminator is reached */
-size_t readline(int8_t fd, char *buf, char term);
-
-/* writes a string into the fd */
-int8_t print(int8_t fd, const char *str);
-
-/* reads n bytes from the fd */
-size_t read(int8_t fd, void *buf, size_t n);
-
-/* writes n bytes into the fd */
-int8_t write(int8_t fd, const void *buf, size_t n);
-
-/* frees fd space */
-void close(int8_t fd);
-
-#endif  // __FD_H__
diff --git a/sw/z80/kernel/include/fs/fdop.h b/sw/z80/kernel/include/fs/fdop.h
deleted file mode 100644
index d4b1b77..0000000
--- a/sw/z80/kernel/include/fs/fdop.h
+++ /dev/null
@@ -1,140 +0,0 @@
-#ifndef __FDOP_H__
-#define __FDOP_H__
-
-#include "types.h"
-
-#ifndef __DIRENT_H__
-struct dirent;
-#endif
-
-/* macro for direct binding */
-
-#define FD_BIND_AS_DIR(oper)    {       \
-                                    oper.ls = &as_ls;   \
-                                    oper.find = &as_find; \
-                                    oper.mkdir = &as_mkdir; \
-                                    oper.rmdir = &as_rmdir; \
-                                    oper.touch = &as_touch; \
-                                    oper.rm = &as_rm; \
-                                    oper.ln = &as_ln; \
-                                }
-
-#define FD_BIND_SS_DIR(oper)    {       \
-                                    oper.ls = &ss_ls;   \
-                                    oper.find = &ss_find; \
-                                    oper.mkdir = &ss_mkdir; \
-                                    oper.rmdir = &ss_rmdir; \
-                                    oper.touch = &ss_touch; \
-                                    oper.rm = &ss_rm; \
-                                    oper.ln = &ss_ln; \
-                                }
-
-#define FD_BIND_AS_FILE(opers, flags) {      \
-                                    if (flags & OPEN_READ)  \
-                                        opers.readline = as_readline;   \
-                                    if (flags & OPEN_APPEND)    \
-                                        opers.append = as_append;   \
-                                    else if (flags & OPEN_WRITE)    \
-                                        opers.print = as_print;     \
-                                    }
-
-#define FD_BIND_SS_FILE(opers, flags) {      \
-                                    if (flags & OPEN_READ)  \
-                                        opers.readline = ss_readline;   \
-                                    if (flags & OPEN_APPEND)    \
-                                        opers.append = ss_append;   \
-                                    else if (flags & OPEN_WRITE)    \
-                                        opers.print = ss_print;     \
-                                     }
-
-#define FD_BIND_AS_BINFILE(opers, flags) {     \
-                                        if (flags & OPEN_READ)  \
-                                            opers.read = as_read;   \
-                                        if (flags & OPEN_APPEND)    \
-                                            opers.bin_append = as_bin_append;   \
-                                        else if (flags & OPEN_WRITE)    \
-                                            opers.write = as_write;     \
-                                        }
-
-#define FD_BIND_SS_BINFILE(opers, flags) {     \
-                                        if (flags & OPEN_READ)  \
-                                            opers.read = ss_read;   \
-                                        if (flags & OPEN_APPEND)    \
-                                            opers.bin_append = ss_bin_append;   \
-                                        else if (flags & OPEN_WRITE)    \
-                                            opers.write = ss_write;     \
-                                        }
-
-/* Set of file descriptors operations */
-/* Determines if to use the serial interface or the address space */
-
-/* Address space section */
-
-/* File functions */
-
-size_t as_readline(inode_t inode, fsize_t seek, char *buf, char term);
-
-size_t as_print(inode_t inode, fsize_t seek, const char *str);
-
-size_t as_append(inode_t inode, fsize_t *seek_ptr, const char *str);
-
-
-size_t as_read(inode_t inode, fsize_t seek, void *buf, size_t n);
-
-size_t as_write(inode_t inode, fsize_t seek, const void *buf, size_t n);
-
-size_t as_bin_append(inode_t inode, fsize_t *seek_ptr, const void *buf, size_t
-n);
-
-/* Directory functions */
-
-size_t as_ls(inode_t inode, struct dirent *buf, uint8_t all);
-
-size_t as_find(inode_t inode, struct dirent *buf, const char *name);
-
-int8_t as_mkdir(inode_t inode, const char *name);
-
-int8_t as_rmdir(inode_t inode, const char *name);
-
-int8_t as_touch(inode_t inode, const char *name);
-
-int8_t as_rm(inode_t inode, const char *name);
-
-int8_t as_ln(inode_t inode, const char *path, const char *name);
-
-/* Serial Space section */
-/* Warning, it doesn't switch to the right driver */
-
-/* File functions */
-
-size_t ss_readline(inode_t inode, fsize_t seek, char *buf, char term);
-
-size_t ss_print(inode_t inode, fsize_t seek, const char *str);
-
-size_t ss_append(inode_t inode, fsize_t *seek_ptr, const char *str);
-
-
-size_t ss_read(inode_t inode, fsize_t seek, void *buf, size_t n);
-
-size_t ss_write(inode_t inode, fsize_t seek, const void *buf, size_t n);
-
-size_t ss_bin_append(inode_t inode, fsize_t *seek_ptr, const void *buf, size_t
-n);
-
-/* Directory functions */
-
-size_t ss_ls(inode_t inode, struct dirent *buf, uint8_t all);
-
-size_t ss_find(inode_t inode, struct dirent *buf, const char *name);
-
-int8_t ss_mkdir(inode_t inode, const char *name);
-
-int8_t ss_rmdir(inode_t inode, const char *name);
-
-int8_t ss_touch(inode_t inode, const char *name);
-
-int8_t ss_rm(inode_t inode, const char *name);
-
-int8_t ss_ln(inode_t, const char *path, const char *name);
-
-#endif // __FDOP_H__
diff --git a/sw/z80/kernel/include/fs/fs.h b/sw/z80/kernel/include/fs/fs.h
deleted file mode 100644
index ad20adb..0000000
--- a/sw/z80/kernel/include/fs/fs.h
+++ /dev/null
@@ -1,63 +0,0 @@
-#ifndef __FS_H__
-#define __FS_H__
-
-#include "types.h"
-
-#define FS_OFFSET 0x1000
-
-#define FS_BLOCKS_SIZE 512
-#define FS_BLOCKS_N     8
-#define FS_BLOCKS_IND   6
-
-#define INODE_TYPE_FILE   0x0
-#define INODE_TYPE_DIR    0x1
-#define INODE_TYPE_SLINK    0x2
-#define INODE_TYPE_SPECIAL  0x3
-
-#define INODE_META_SIZE 8
-
-/* inode basic structure */
-struct fs_inode
-{
-    /* inode meta data */
-
-    uint        mode :3;  // chmod
-    uint        uid :3;   // chown
-    uint        type :2;  // file, dir, sym-link, special
-
-    time_t      ctime;          // creation time
-
-    uint24_t     size;              // inode size
-
-    /* data storage informations */
-    /* it doesn't allocate memory, virtual size FS_BLOCKS_N */ 
-    blk_t     blocks[];
-};
-
-#define FS_DEV_ROM      0x7f    /* 01111111 */
-#define FS_DEV_NULL     0x80    /* 10000000 */
-
-#define FS_ROM_SPACE    0x2000  // second rom 
-
-#define FS_INO_ROOT   0x0       // first inode
-
-#define FS_INODE_ROOT(inode)   {inode.dev = 0xff; inode.inode = 0x0}
-#define FS_INODE_NULL(inode)   {inode.dev = 0x80; inode.inode = 0x0}
-
-#define FS_USE_ROM(inode)   {inode.dev == 0x7f}
-
-/* get block seek in current device */
-devsize_t fs_block(blk_t block);
-
-/* get common inode seek in current device */
-/* c_inode must be set first */
-/* returns seek at the beginning of blocks field */
-devsize_t fs_inode(struct fs_inode *buf);
-
-/* common inode for syscalls */
-extern inode_t c_inode;
-
-/* parse a path, absolute or relative to c_inode */
-inode_t fs_parse_path(const char *path);
-
-#endif  // __FS_H__
diff --git a/sw/z80/kernel/include/fs/iter.h b/sw/z80/kernel/include/fs/iter.h
deleted file mode 100644
index 41f011d..0000000
--- a/sw/z80/kernel/include/fs/iter.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef __ITER_H__
-#define __ITER_H__
-
-struct inode_iter
-{
-    devsize_t   dev_seek;       /* seek position in the volume */
-    devsize_t   blk_end;        /* end of the block */
-
-    int16_t     blk_index;      /* index of the block */
-
-    int8_t      blk_level;      /* recursion level, indirect blocks */
-    
-    fsize_t     fseek;          /* virtual seek in the file */
-    fsize_t     size;           /* file size */
-};
-
-#endif  // __ITER_H__
diff --git a/sw/z80/kernel/include/fs/users.h b/sw/z80/kernel/include/fs/users.h
deleted file mode 100644
index 83980e5..0000000
--- a/sw/z80/kernel/include/fs/users.h
+++ /dev/null
@@ -1,21 +0,0 @@
-#ifndef USERS_H
-#define USERS_H
-
-#include "types.h"
-
-#define USERS_MAX   8
-#define USER_ROOT   0 
-
-/* current user in use */
-extern struct fs_user c_user;
-
-struct fs_user
-{
-    char        name[32];
-    ino_t       home;
-    uint8_t     perm;       // TODO, permissions 
-};
-
-/* all users are in rom device */
-
-#endif
diff --git a/sw/z80/kernel/include/memory.h b/sw/z80/kernel/include/memory.h
deleted file mode 100644
index 67c4b88..0000000
--- a/sw/z80/kernel/include/memory.h
+++ /dev/null
@@ -1,50 +0,0 @@
-#ifndef __MEMORY_H__
-#define __MEMORY_H__
-
-#include "types.h"
-#include "devices.h"
-
-/* maximum number of pages on the system */
-#define PAGES_MAX_COUNT 32
-#define PAGE_SIZE     1000
-
-/* in our system there are only 16 pages since only 64KB can be addressed
- * to optimize the memory management in ROM and RAM only pages from this set
- * shall be used
- */
-// ROM
-#define ADDR_PAGE_0  0x0000
-#define ADDR_PAGE_1  0x1000
-#define ADDR_PAGE_2  0x2000
-#define ADDR_PAGE_3  0x3000
-// IOSPACE
-#define ADDR_PAGE_4  0x4000
-#define ADDR_PAGE_5  0x5000
-#define ADDR_PAGE_6  0x6000
-#define ADDR_PAGE_7  0x7000
-// RAM
-#define ADDR_PAGE_8  0x8000
-#define ADDR_PAGE_9  0x9000
-#define ADDR_PAGE_10 0xA000
-#define ADDR_PAGE_11 0xB000
-#define ADDR_PAGE_12 0xC000
-#define ADDR_PAGE_13 0xD000
-#define ADDR_PAGE_14 0xE000
-#define ADDR_PAGE_15 0xF000
-
-#define ADDR_PAGE_FIRST  ADDR_PAGE_8
-#define ADDR_PAGE_LAST   ADDR_PAGE_15
-
-struct page
-{
-	pid_t pid;       // process owner of the page (0 if free)
-    uint16_t addr;   // physical address
-};
-
-int mmu_write_table(void);
-
-int page_new(void);
-int page_map(int page, int pid, uint16_t addr);
-int page_unmap(int page);
-
-#endif // __MEMORY_H__
diff --git a/sw/z80/kernel/include/process.h b/sw/z80/kernel/include/process.h
deleted file mode 100644
index 3b0c843..0000000
--- a/sw/z80/kernel/include/process.h
+++ /dev/null
@@ -1,43 +0,0 @@
-#ifndef __PROCESS_H__
-#define __PROCESS_H__
-
-#include "types.h"
-#include "memory.h"
-
- /* maximum number of processes (i.e. pages in ram)
-  * since each program can use only one page in ram
-  */
-#define PROC_COUNT 2 
-
-/* the pid is defined with a single byte (pid_t is uint8_t), because of that 
- * there cannot be more than 255 processes open at the same time. this is a
- * limitation but for our purposes is more than enough
- */
-#define PID_COUNT_MAX 255
-
-struct executable
-{
-    void *text;
-    size_t text_size;
-    void *bss;
-    size_t bss_size;
-};
-
-struct process
-{
-    uint blocked :1;      // process is waiting for hardware or locked
-    uint running :1;      // pid is used
-    uint pages;           // number of pages used by the process
-    struct page page[4];  // pages used by the process
-};
-
-pid_t newpid(void);
-
-int fork(void);
-int exec(char *path, char *args);
-int spawn(char *path, char *args);
-
-pid_t getpid(void);
-int kill(pid_t pid);
-
-#endif // __PROCESS_H__
diff --git a/sw/z80/kernel/include/sio.h b/sw/z80/kernel/include/sio.h
deleted file mode 100644
index 276b99c..0000000
--- a/sw/z80/kernel/include/sio.h
+++ /dev/null
@@ -1,43 +0,0 @@
-#ifndef __SIO_H__
-#define __SIO_H__
-
-#include "types.h"
-
-#define SIO_PORT_0 0x0
-#define SIO_PORT_1 0x1
-#define SIO_PORT_2 0x2
-#define SIO_PORT_3 0x3
-#define SIO_PORT_4 0x4
-#define SIO_PORT_5 0x5
-#define SIO_PORT_6 0x6
-#define SIO_PORT_7 0x7
-
-/* current port in use */
-extern uint8_t      sio_port;
-
-/* current seek in the device */
-extern devsize_t    sio_seek;
-
-struct dev_buffer
-{
-   // TODO, bytes needed to the device buffer interface
-};
-
-/* points to the buffers mapped in the I/O space */
-/* to be defined precisely in assembly */
-extern volatile struct dev_buffer sio_buffers[8];
-
-/* initialize serial interface */
-void sio_init();
-
-/* syscall: read one byte from the current device */
-uint8_t sio_recv();
-/* syscall: write one byte into the current device */
-void sio_send(uint8_t value);
-
-/* read n bytes from the current port */
-size_t sio_read(void *buffer, size_t n);
-/* write n bytes into the current port */
-int8_t sio_write(const void *buffer, size_t n);
-
-#endif  // __SIO_H__
diff --git a/sw/z80/kernel/include/stat.h b/sw/z80/kernel/include/stat.h
deleted file mode 100644
index 44c0f63..0000000
--- a/sw/z80/kernel/include/stat.h
+++ /dev/null
@@ -1,24 +0,0 @@
-#ifndef __STAT_H__
-#define __STAT_H__
-
-#include "types.h"
-
-struct stat
-{
-    inode_t     inode;      /* inode reference */
-
-    uint        mode :3;    /* mode */
-    uint        uid :3;     /* owner id */
-    uint        type :2;    /* file, dir or link */
-
-    devsize_t   size;       /* file size */
-
-    size_t      blk_size;   /* single block size */
-    size_t      blk_used;   /* blocks used by the file */
-
-    time_t      ctime;      /* creation time */
-}
-
-struct stat * stat(const char *path, struct stat *buffer);
-
-#endif  // __STAT_H__
diff --git a/sw/z80/kernel/include/types.h b/sw/z80/kernel/include/types.h
deleted file mode 100644
index c6e620b..0000000
--- a/sw/z80/kernel/include/types.h
+++ /dev/null
@@ -1,62 +0,0 @@
-#ifndef __TYPES_H__
-#define __TYPES_H__
-
-/* only types from primitive types are defined in this file */ 
-
-typedef volatile unsigned char      register_t;
-
-typedef unsigned int                uint;
-
-typedef char                        int8_t;
-typedef unsigned char               uint8_t;
-typedef int                         int16_t;
-typedef unsigned int                uint16_t;
-typedef long int                    int32_t;
-typedef unsigned long int           uint32_t;
-
-typedef uint16_t                    size_t;
-typedef int16_t                     ssize_t;
-
-typedef uint8_t                     pid_t;
-typedef uint16_t                    ino_t;
-
-typedef uint8_t                     dev_t;
-typedef uint32_t                    devsize_t;
-typedef uint8_t                     fd_t;
-typedef uint16_t                    blk_t;
-typedef uint8_t                     user_t;
-
-typedef struct {
-    uint8_t member[3];
-
-} uint24_t;
-
-typedef uint32_t                    fsize_t;
-
-typedef struct 
-{
-    dev_t   dev;    // device id, global in the fs
-    ino_t   inode;    // inode id relative to the volume
-
-} inode_t;
-
-typedef struct time_s
-{
-    struct
-    {
-        uint    minutes :6;
-        uint    hour    :5;
-
-    } time;
-
-    struct
-    {
-        uint    day     :5;
-        uint    month   :4;
-        uint    year    :12;
-
-    } date;
-
-} time_t;
-
-#endif
diff --git a/sw/z80/kernel/kernel.c b/sw/z80/kernel/kernel.c
deleted file mode 100644
index 3d5aeb6..0000000
--- a/sw/z80/kernel/kernel.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include "types.h"
-#include "usart.h"
-
-void kmain(void)
-{
-    usart_init(USART_BAUDRATE_9600, USART_PARITY_EVEN, USART_STOP_BITS_1);
-}
diff --git a/sw/z80/kernel/makefile b/sw/z80/kernel/makefile
deleted file mode 100644
index be8eed4..0000000
--- a/sw/z80/kernel/makefile
+++ /dev/null
@@ -1,53 +0,0 @@
-####
-# source code settings
-#
-OSNAME := helvetiOS
- 
-CSOURCES 	:=  $(wildcard *.c) \
-				$(wildcard drivers/*.c)
-
-OBJECTS 	:= $(patsubst %.c,build/%.rel,$(CSOURCES))
-HEXFILE		:= build/$(OSNAME).hex
-BINARY  	:= build/$(OSNAME).bin
-
-### 
-# compiler settings
-
-CC 		:= sdcc
-
-CFLAGS	:= -mz80 \
-			-I include \
-			-I include/drivers \
-			-I libc/include \
-			--opt-code-size \
-			-DDEBUG
-
-LDFLAGS := -mz80 --no-std-crt0 build/crt0.rel \
-			--std-c89 -pedantic \
-			--code-loc 0x0800 --data-loc 0x8000
-
-.PHONY: dirs dis clean
-all: $(BINARY)
-
-# build binary
-$(BINARY): $(OBJECTS) dirs
-	$(CC) $(LDFLAGS) $(OBJECTS) -o $(HEXFILE)
-	makebin -s 16384 $(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 build/kernel build/libc build/kernel/drivers
-
-dis: $(BINARY)
-	dz80 -b -n $<
-
-clean:
-	- rm -rd build/*
-	- rm crt0.rel
diff --git a/sw/z80/kernel/memory.c b/sw/z80/kernel/memory.c
deleted file mode 100644
index 1b2cc76..0000000
--- a/sw/z80/kernel/memory.c
+++ /dev/null
@@ -1,94 +0,0 @@
-#include "memory.h"
-
-static struct page pages_table[PAGES_MAX_COUNT];
-
-int mmu_write_table(void)
-{
-    int i;
-
-    for (i = 0; i < PAGES_MAX_COUNT; i++) {
-        if (pages_table[i].pid != 0) {
-            // write to mmu table
-        }
-    }
-
-    return 0;
-}
-
-int page_new(void)
-{
-    int i, used;
-    uint16_t addr;
-
-    for (addr = ADDR_PAGE_FIRST; addr < ADDR_PAGE_LAST; addr += PAGE_SIZE) {
-        used = 0;
-
-        for (i = 0; i < PAGES_MAX_COUNT; i++) {
-            if (pages_table[i].addr == addr) {
-                used = 1;
-                break;
-            }
-        }
-
-        if (!used)
-            return i;
-    }
-
-    return -1;
-}
-
-int page_map(int page, int pid, uint16_t addr)
-{
-    if (page >= PAGES_MAX_COUNT)
-        return -1;
-
-    if (pages_table[page].pid != 0)
-        return -2;
-
-    pages_table[page].addr = addr;
-    pages_table[page].pid = pid;
-
-    return 0;
-}
-
-int page_unmap(int page)
-{
-    if (page >= PAGES_MAX_COUNT)
-        return -1;
-
-    if (pages_table[page].pid == 0)
-        return -2;
-
-    pages_table[page].pid = 0;
-    pages_table[page].addr = 0;
-    return 0;
-}
-
-/* k_malloc manager */
-/*
-struct k_buf_entry k_buf_table[K_BUF_MAX_COUNT];
-
-struct k_buf k_buffers[K_BUF_MAX_COUNT];
-
-void * k_malloc()
-{
-    for (uint8_t i = 0; i < K_BUF_TABLE_COUNT; i++)
-    {
-        for (uint8_t bit = 0x80, j = 0; j < 8; bit >>= 1, j++)
-        {
-            if (bit & k_buf_table[i])
-            {
-                k_buf_table[i] |= bit;
-                return &k_buffers[8 * i + j];
-            }
-        }
-    }
-}
-
-void k_free(void * ptr)
-{
-    uint8_t index = (ptr - &k_buffers[0]) / K_BUF_SIZE;
-
-    if (index < K_BUF_MAX_COUNT)
-        k_buf_table[index / 8] ^= 0x80 >> index % 8;
-}*/
diff --git a/sw/z80/kernel/process.c b/sw/z80/kernel/process.c
deleted file mode 100644
index 7d8db89..0000000
--- a/sw/z80/kernel/process.c
+++ /dev/null
@@ -1,58 +0,0 @@
-#include "process.h"
-
-static struct process proc_table[PID_COUNT_MAX];
-static struct process *current_proc;
-
-pid_t newpid(void)
-{
-    int i;
-    static pid_t last_pid = 0;
-
-    for (i = 0; i < PID_COUNT_MAX; i++, last_pid++) {
-        if (last_pid == PID_COUNT_MAX) {
-            last_pid = 0;
-            continue;            
-        }
-
-        if (!proc_table[last_pid].running)
-            break;
-    }
-
-    if (i >= PID_COUNT_MAX)
-        return 0;
-
-    return last_pid;
-}
-
-int fork(void)
-{
-    int i, p;
-    pid_t child_pid = newpid();
-
-    if (child_pid == 0)
-        return -1;
-
-
-    for (i = 0; i < current_proc->pages; i++) {
-        p = page_new();
-
-        if (p == -1) {
-            return -2;
-        }
-
-        // TODO: use memcpy()
-        // SDCC does not allow assignemnts of structs
-
-        // proc_table[child_pid].page[i] = p;
-    }
-}
-
-int exec(char *path, char *args)
-{
-    
-}
-
-int spawn(char *path, char *args)
-{
-    
-}