Library improvements

docs/api/target-platforms.md

@@ -3,8 +3,8 @@
 # Target platforms
 
 Currently, Millfork supports creating disk- or tape-based programs
-for Commodore, Apple, BBC and Atari 8-bit computers, NEC PC-88, ZX Spectrum 48k,
-and cartridge-based programs for Famicom/NES and Atari 2600,
+for Commodore, Apple, BBC and Atari 8-bit computers, NEC PC-88, ZX Spectrum 48k, CP/M,
+and cartridge-based programs for Commodore 64, VIC-20, Famicom/NES and Atari 2600,
 but it may be expanded to support other 6502-based and Z80-based platforms in the future.
 
 To add a custom platform yourself, see [the custom platform adding guide](./custom-platform.md).
@@ -15,6 +15,10 @@ The following platforms are currently supported:
 
 * `c64` – Commodore 64
 
+* `c64_crt8k` – Commodore 64, 8K ROM cartridge
+
+* `c64_crt16k` – Commodore 64, 16K ROM cartridge
+
 * `c64_scpu` – Commodore 64 with SuperCPU in emulation mode
 
 * `c64_scpu16` – Commodore 64 with SuperCPU in native, 16-bit mode (very buggy)
@@ -33,6 +37,8 @@ Read [the LUnix programming guide](./lunix-programming-guide.md) for more info.
 
 * `vic20_8k` – Commodore VIC-20 with 8K or 16K memory expansion
 
+* `vic20_a000` – Commodore VIC-20, 8K ROM cartridge at $A000
+
 * `c128` – Commodore 128 in its native mode
 
 * `pet` – Commodore PET
@@ -55,7 +61,7 @@ Read [the BBC Micro programming guide](./bbcmicro-programming-guide.md) for more
 The compiler only emits raw binaries, not disk images.
 Read [the Apple 2 programming guide](./apple2-programming-guide.md) for more info.
 
-* `pc88` – NEC PC-88 (no ROM routines are mapped yet)
+* `pc88` – NEC PC-88
 
 * `zxspectrum` – Sinclair ZX Spectrum 48k
 

docs/index.md

@@ -39,8 +39,12 @@
 
 * [`stdlib` module](stdlib/stdlib.md)
 
+* [Modules for reading input devices](stdlib/input.md)
+
 * [Other cross-platform modules](stdlib/other.md)
 
+* [Definitions available on only some platforms](stdlib/frequent.md)
+
 * [C64-only modules](stdlib/c64.md)
 
 * [NES-only modules](stdlib/nes.md)

docs/stdlib/c64.md

@@ -8,16 +8,53 @@ The `c64_kernal` module is imported automatically on the C64 target.
 
 TODO
 
-## `c64_basic` module
+## c64_basic module
 
 TODO
 
-## `c1531_mouse` module
+## c64_hardware
+
+TODO
+
+## c1531_mouse
 
 The `c1531_mouse` module implements a Commodore 1531 proportional mouse driver compatible with the `mouse` module.
 
-#### `void c1531_mouse ()`
+#### `void c1531_mouse()`
 
 Updates the state of the mouse.
 
+## c1531_mouse_default
+
+Defines the `c1531` module as the default module for reading mouse input.
+
+#### `alias read_mouse = c1531_mouse`
+
+## c64_joy
+
+The `c64_joy` module implements a joystick driver compatible with the `joy` module.
+
+#### `void read_joy2()`
+
+Reads the joystick from the port 2.
+
+#### `void read_joy1()`
+
+Reads the joystick from the port 1.
+
+#### `void read_also_joy2()`
+
+Reads the joystick from the port 2 and adds its readouts to the current readouts.
+
+#### `void read_also_joy1()`
+
+Reads the joystick from the port 1 and adds its readouts to the current readouts.
+
+## c64_joy2_default
+
+Defines the joystick in port 2 as the default joystick.
+
+#### `alias read_joy = read_joy2`
+
+
 

docs/stdlib/frequent.md

@@ -0,0 +1,42 @@
+[< back to index](../index.md)
+
+Definitions on the following list are frequently provided by the default automatically-imported modules. 
+
+However, as they are not the part of the standard library, they might not be available on all targets:
+
+#### `void putchar(byte char)`
+
+Prints a single character.
+
+Available for: all computer targets.
+
+#### `void new_line()`
+
+Moves the cursor to the next line.
+
+Available for: all computer targets.
+
+#### `void bell()`
+
+Beeps.
+
+Available for: Apple 2, ZX Spectrum.
+
+#### `void set_bg_color(byte color)`
+
+Sets the screen background color.
+
+Available for: C64, VIC-20, C64, C264 series.
+
+#### `void set_border(byte color)`
+
+Sets the screen border color.
+
+Available for: VIC-20, C64, C264 series, ZX Spectrum.
+
+#### `const byte black, white, red, green, blue, cyan, purple, yellow`
+
+Various colour constants.
+
+Available for: VIC-20, C64, C264 series, ZX Spectrum.
+

docs/stdlib/input.md

@@ -0,0 +1,66 @@
+[< back to index](../index.md)
+
+## joy
+
+The module contains global variables representing the state of the one-button joystick.
+If the program is not using any joystick driver, the state of these variables is undefined.
+
+#### `sbyte input_dx`
+
+Horizontal joystick movement. 1 if right, -1 if left, 0 if neither.
+
+#### `sbyte input_dy`
+
+Vertical joystick movement. 1 if right, -1 if left, 0 if neither.
+
+#### `byte input_btn`
+
+1 if main button pressed, 0 id not pressed.
+
+#### `void reset_joy()`
+
+Resets the state variables.
+For platforms with more than one button, this resets only the main button state.
+
+## null_joy_default
+
+This module set the default joystick to no joystick. 
+
+#### `alias read_joy`
+
+## mouse
+
+The `mouse` module automatically imports the `x_coord` module.
+
+The module contains global variables representing the state of the mouse.
+If the program is not using any mouse driver, the state of these variables is undefined.
+
+#### `x_coord mouse_x`
+
+Mouse X position.
+
+#### `byte mouse_y`
+
+Mouse Y position.
+
+#### `byte mouse_lbm`
+
+1 if the left mouse button is being pressed, 0 otherwise
+
+#### `byte mouse_rbm`
+
+1 if the right mouse button is being pressed, 0 otherwise
+
+## `x_coord` module
+
+#### `alias x_coord`
+
+The type for representing horizontal screen coordinates.
+It's `byte` if the screen is 256 pixels wide or less,
+or `word` if the screen is more that 256 pixels wide.
+
+## null_mouse_default
+
+This module set the default joystick to no joystick. 
+
+#### `void read_mouse()`

docs/stdlib/nes.md

@@ -2,13 +2,13 @@
 
 # NES/Famicom-oriented modules
 
-## `nes_hardware` module
+## nes_hardware
 
 The `nes_hardware` module is imported automatically on NES targets.
 
 TODO
 
-## `nes_mmc4` module
+## nes_mmc4
 
 The `nes_mmc4` module is imported automatically on the NES MMC4 target.
 and contains routines related to MMC4 bankswitching.
@@ -37,4 +37,51 @@ Switches nametable mirroring to vertical.
 
 #### `void set_horizontal_mirroring()`
 
-Switches nametable mirroring to horizontal.
+Switches nametable mirroring to horizontal.
+
+## nes_joy
+
+Provides an interface for reading joypads that is compatible with the `joy` module.
+
+#### `alias input_a = input_btn`
+
+1 if A button pressed, 0 id not pressed.
+
+#### `byte input_b`
+
+1 if B button pressed, 0 id not pressed.
+
+#### `byte input_select`
+
+1 if Select button pressed, 0 id not pressed.
+
+#### `byte input_start`
+
+1 if Start button pressed, 0 id not pressed.
+
+#### `void read_joy1()`
+
+Reads the joypad from the port 1.
+
+#### `void read_joy2()`
+
+Reads the joypad from the port 2.
+
+#### `void read_also_joy1()`
+
+Reads the joypad from the port 1 and adds its readouts to the current readouts.
+
+#### `void read_also_joy2()`
+
+Reads the joypad from the port 2 and adds its readouts to the current readouts.
+
+#### `void nes_reset_joy()`
+
+Resets the state variables.
+Unlike `reset_joy`, this resets all the NES button states.
+
+## nes_joy1_default
+
+Defines the joystick in port 1 as the default joystick.
+
+#### `alias read_joy = read_joy1`

docs/stdlib/other.md

@@ -1,6 +1,6 @@
 [< back to index](../index.md)
 
-## `stdio` module
+## stdio
 
 The `stdio` module automatically imports the `string` module.  
 It requires an implementation of `void putchar(byte a)` and therefore works only on targets with console output.
@@ -14,40 +14,9 @@ Prints a string of length `len` located at address `str`.
 Prints a null-terminated string located at address `str`.  
 If the string is longer than 255 bytes, then the behaviour is undefined (might even crash).
 
-## `string` module
+## string
 
 #### `byte strzlen(pointer str)`
 
 Calculates the length of a null-terminated string.  
 If the string is longer than 255 bytes, then the behaviour is undefined (might even crash).
-
-## `mouse` module
-
-The `mouse` module automatically imports the `x_coord` module.
-
-The module contains global variables representing the state of the mouse.
-If the program is not using any mouse driver, the state of these variables is undefined.
-
-#### `x_coord mouse_x`
-
-Mouse X position.   
-
-#### `byte mouse_y`
-
-Mouse Y position.   
-
-#### `byte mouse_lbm`
-
-1 if the left mouse button is being pressed, 0 otherwise 
-
-#### `byte mouse_rbm`
-
-1 if the right mouse button is being pressed, 0 otherwise 
-
-## `x_coord` module
-
-#### `alias x_coord`
-
-The type for representing horizontal screen coordinates.
-It's `byte` if the screen is 256 pixels wide or less,
-or `word` if the screen is more that 256 pixels wide. 

docs/stdlib/stdlib.md

@@ -1,6 +1,6 @@
 [< back to index](../index.md)
 
-## `stdlib` module
+## stdlib
 
 The `stdlib` module is automatically imported on most targets.
 
@@ -30,4 +30,4 @@ Returns an ASCII representation of the lower nibble of the given byte.
 
 #### `macro asm void panic()`
 
-Crashes the program.
+Crashes the program.

examples/README.md

@@ -2,9 +2,11 @@
 
 ## Cross-platform examples
 
-* [Hello world](hello_world/hello_world.mfk) (C64/C16/PET/VIC-20/Atari/Apple II/BBC Micro) – simple text output
+* [Hello world](hello_world/hello_world.mfk) (C64/C16/PET/VIC-20/Atari/Apple II/BBC Micro/PC-88) – simple text output
 
-* [Text encodings](c64/text_encodings.mfk) (C64/ZX Spectrum)– examples of text encoding features
+* [Text encodings](c64/text_encodings.mfk) (C64/ZX Spectrum) – examples of text encoding features
+
+* [Bell](apple2/bell.mfk) (Apple II/ZX Spectrum) – a program that goes \*ding!\*
 
 ## Commodore 64 examples
 
@@ -30,10 +32,6 @@
 
 * [MMC4 example](nes/nestest_mmc4.mfk) – the same thing as above, but uses a MMC4 mapper just to test bankswitching
 
-## Apple II examples
-
-* [Bell](apple2/bell.mfk) – a program that goes \*ding!\*
-
 ## Atari 2600 examples
 
 * [Colors](vcs/colors.mfk) – simple static rasterbars

examples/hello_world/hello_world.mfk

@@ -5,9 +5,21 @@ import stdio
 
 array hello_world = "hello world"
 
-void main(){
+void main() {
+
+#if CBM_64 || CBM_264
+    set_bg_color(green)
+#endif
+#if CBM_64 || CBM_264 || ZX_SPECTRUM
+    set_border(red)
+#endif
+
     putstr(hello_world, hello_world.length)
-    putchar(13)
+    new_line()
     putstrz("hello world again"z)
+
+#if not(CPM)
     while(true){}
+#endif
+
 }

examples/nes/nestest.mfk

@@ -1,6 +1,8 @@
 // Based upon the example code from NES 101 tutorial by Michael Martin
 // compile with -t nes_small
 
+import nes_joy1_default
+
 void main() {
     init_graphics()
     init_input()
@@ -99,17 +101,14 @@ void update_sprite() {
 }
 
 void react_to_input() {
-    strobe_joypad()
-    if read_joypad1() & 1 != 0 { // A button
+    read_joy()
+    if input_a != 0 { // A button
         reverse_dx()
     }
-    read_joypad1() // B button
-    read_joypad1() // Select button
-    read_joypad1() // Start button
-    if read_joypad1() & 1 != 0 { // Up button
+    if input_dy < 0 { // Up button
         if oam_buffer[0] > 7 { oam_buffer[0] -= 1}
     }
-    if read_joypad1() & 1 != 0 { // Down button
+    if input_dy > 0 { // Down button
         if oam_buffer[0] < 223 { oam_buffer[0] += 1}
     }
 }

include/a8_kernel.mfk

@@ -4,11 +4,15 @@
 #endif
 
 asm void putchar(byte a) {
-    tax
+    ? tax
     lda $347
     pha
     lda $346
     pha
-    txa
+    ? txa
     rts
-}
+}
+
+inline void new_line() {
+    putchar($9b)
+}

include/apple2_kernel.mfk

@@ -9,3 +9,4 @@ array hires_page_2 [$2000] @$4000
 asm void bell() @$FBE4 extern
 
 asm void putchar(byte a) @$FDED extern
+asm void new_line() @$FC62 extern

include/bbc_kernal.mfk

@@ -6,3 +6,7 @@
 // OSASCI. Write a character (to screen) from A plus LF if (A)=&0D
 // Input: A = Byte to write.
 asm void putchar(byte a) @$FFE3 extern
+
+inline void new_line() {
+    putchar(13)
+}

include/c128_kernal.mfk

@@ -6,4 +6,8 @@
 
 // CHROUT. Write byte to default output. (If not screen, must call OPEN and CHKOUT beforehands.)
 // Input: A = Byte to write.
-asm void putchar(byte a) @$FFD2 extern
+asm void putchar(byte a) @$FFD2 extern
+
+inline void new_line() {
+    putchar(13)
+}

include/c1531_default.mfk

@@ -0,0 +1,3 @@
+import c1541
+
+alias read_mouse = c1531_mouse

include/c264_kernal.mfk

@@ -5,4 +5,8 @@
 
 // CHROUT. Write byte to default output. (If not screen, must call OPEN and CHKOUT beforehands.)
 // Input: A = Byte to write.
-asm void putchar(byte a) @$FFD2 extern
+asm void putchar(byte a) @$FFD2 extern
+
+inline void new_line() {
+    putchar(13)
+}

include/c264_ted.mfk

@@ -2,6 +2,35 @@
 #warn c264_ted module should be only used on C264-compatible targets
 #endif
 
+byte ted_cursor_hi @$FF0C
+byte ted_cursor_lo @$FF0D
+byte ted_color0    @$FF15
+byte ted_color1    @$FF16
+byte ted_color2    @$FF17
+byte ted_color3    @$FF18
+byte ted_border    @$FF19
+byte ted_raster_y  @$FF1D
+byte ted_raster_x  @$FF1E
+
+alias ted_bg_color = ted_color0
+
+macro void set_bg_color(byte color) {
+    ted_color0 = color
+}
+
+macro void set_border(byte color) {
+    ted_border = color
+}
+
+inline void set_ted_cursor(word position) {
+    ted_cursor_hi = position.hi
+    ted_cursor_lo = position.lo
+}
+
+inline word get_ted_cursor() {
+    return ted_cursor_hi:position.lo
+}
+
 const byte black = 0
 const byte white = $71
 const byte red = $22

include/c64_joy.mfk

@@ -0,0 +1,38 @@
+// standard joystick driver for Commodore 64
+
+#if not(CBM_64)
+#warn c64_joy module should be only used on C64-compatible targets
+#endif
+
+import joy
+import c64_cia
+
+inline void read_joy2 () {
+    reset_joy()
+    read_also_joy2()
+}
+inline void read_joy1 () {
+    reset_joy()
+    read_also_joy1()
+}
+void read_also_joy2() {
+	poke($dc02, 0)
+	byte value
+	value = peek($dc00)
+	if value & 1 == 0 { input_dy -= 1 }
+	if value & 2 == 0 { input_dy += 1 }
+	if value & 4 == 0 { input_dx -= 1 }
+	if value & 8 == 0 { input_dx += 1 }
+	if value & 16 == 0 { input_btn += 1 }
+}
+
+void read_also_joy1() {
+	poke($dc03, 0)
+	byte value
+	value = peek($dc01)
+	if value & 1 == 0 { input_dy -= 1 }
+	if value & 2 == 0 { input_dy += 1 }
+	if value & 4 == 0 { input_dx -= 1 }
+	if value & 8 == 0 { input_dx += 1 }
+	if value & 16 == 0 { input_btn += 1 }
+}

include/c64_joy2_default.mfk

@@ -0,0 +1,5 @@
+// set C64 joystick in port 2 as the default
+
+import c64_joy
+
+alias read_joy = read_joy2

include/c64_kernal.mfk

@@ -4,6 +4,10 @@
 // Input: A = Byte to write.
 asm void putchar(byte a) @$FFD2 extern
 
+inline void new_line() {
+    putchar(13)
+}
+
 // OPEN. Open file. (Must call SETLFS and SETNAM beforehands.)
 asm void open() @$FFC0 extern
 

include/c64_vic.mfk

@@ -131,6 +131,14 @@ macro void vic_bitmap_2000() {
     vic_mem |= 8
 }
 
+macro void set_bg_color(byte color) {
+    vic_bg_color0 = color
+}
+
+macro void set_border(byte color) {
+    vic_border = color
+}
+
 // x, y < 8
 // default: x=0, y=3
 void vic_set_scroll(byte x, byte y) {

include/cpm_bdos.mfk

@@ -8,10 +8,15 @@ inline asm void exit() {
 }
 inline asm void putchar (byte e) {
 	? mvi c, 2
-	call 5	
+	call 5
 	? ret
 }
 
+inline void new_line() {
+	putchar(13)
+	putchar(10)
+}
+
 inline asm byte getchar() {
 	? mvi c, 1
 	call 5	

include/joy.mfk

@@ -0,0 +1,16 @@
+// Generic module for joystick/gamepad support
+
+// Horizontal movement: -1 for left, 1 for right
+sbyte input_dx
+
+// Vertical movement: -1 for up, 1 for down
+sbyte input_dy
+
+// Main button: 1 pressed, 0 not pressed
+byte input_btn
+
+void reset_joy() {
+	input_dx = 0
+	input_dy = 0
+	input_btn = 0
+}

include/loader_a000.mfk

@@ -0,0 +1,10 @@
+segment(prgrom)
+array __vectors @$A000 = [
+    main.addr.lo,
+    main.addr.hi,
+    main.addr.lo,
+    main.addr.hi
+]
+
+segment(prgrom)
+array __boot_signature @$A004 = [$41, $30, $C3, $C2, $CD]

include/nes_joy.mfk

@@ -0,0 +1,47 @@
+// standard joystick driver for NES
+
+import joy
+import nes_hardware
+
+alias input_a = input_btn
+byte input_b
+byte input_select
+byte input_start
+
+macro void read_joy1() {
+    nes_reset_joy()
+    read_also_joy2()
+}
+
+macro void read_joy2() {
+    nes_reset_joy()
+    read_also_joy1()
+}
+
+void nes_reset_joy() {
+	input_b = 0
+	input_select = 0
+	input_start = 0
+	reset_joy()
+}
+
+inline void read_also_joy1() {
+    strobe_joypad()
+    __parse_nes_joypad(read_joypad1())
+}
+
+inline void read_also_joy2() {
+    strobe_joypad()
+    __parse_nes_joypad(read_joypad2())
+}
+
+void __parse_nes_joypad(byte b) {
+    if read_joypad1() & 1 != 0 { input_a += 1 }
+    if read_joypad1() & 1 != 0 { input_b += 1 }
+    if read_joypad1() & 1 != 0 { input_select += 1 }
+    if read_joypad1() & 1 != 0 { input_start += 1 }
+    if read_joypad1() & 1 != 0 { input_dy -= 1 }
+    if read_joypad1() & 1 != 0 { input_dy += 1 }
+    if read_joypad1() & 1 != 0 { input_dx -= 1 }
+    if read_joypad1() & 1 != 0 { input_dx += 1 }
+}

include/nes_joy1_default.mfk

@@ -0,0 +1,5 @@
+// set NES joypad in port 1 as the default
+
+import nes_joy
+
+alias read_joy = read_joy1

include/null_joy_default.mfk

@@ -0,0 +1,5 @@
+// set no joystick as the default
+
+import joy
+
+alias read_joy = reset_joy

include/null_mouse_default.mfk

@@ -0,0 +1,10 @@
+// set no mouse as the default
+
+import mouse
+
+void read_mouse() {
+    mouse_x = 0
+    mouse_y = 0
+    mouse_lbm = 0
+    mouse_rbm = 0
+}

include/pc88.ini

@@ -3,7 +3,7 @@
 [compilation]
 arch=z80
 encoding=jisx
-modules=default_panic,stdlib
+modules=default_panic,stdlib,pc88
 
 [allocation]
 ; TODO: find a more optimal start address

include/pc88.mfk

@@ -0,0 +1,11 @@
+
+#if not(NEC_PC_88)
+#warn pc88 module should be only used on PC-88 targets
+#endif
+
+asm void putchar(byte a) @$3e0d extern
+
+inline void new_line() {
+    putchar(13)
+    putchar(10)
+}

include/vic20.ini

@@ -2,7 +2,7 @@
 arch=nmos
 encoding=petscii
 screen_encoding=petscr
-modules=loader_1001,vic20_kernal,default_panic,stdlib
+modules=loader_1001,vic20_kernal,vic20_hardware,default_panic,stdlib
 
 
 [allocation]

include/vic20_3k.ini

@@ -2,7 +2,7 @@
 arch=nmos
 encoding=petscii
 screen_encoding=petscr
-modules=loader_0401,vic20_kernal,default_panic,stdlib
+modules=loader_0401,vic20_kernal,vic20_hardware,default_panic,stdlib
 
 
 [allocation]

include/vic20_8k.ini

@@ -2,7 +2,7 @@
 arch=nmos
 encoding=petscii
 screen_encoding=petscr
-modules=loader_1201,vic20_kernal,default_panic,stdlib
+modules=loader_1201,vic20_kernal,vic20_hardware,,default_panic,stdlib
 
 
 [allocation]

include/vic20_a000.ini

@@ -0,0 +1,34 @@
+; VIC-20
+; 8K ROM cartridge at $A000
+
+[compilation]
+arch=nmos
+encoding=petscii
+screen_encoding=petscr
+modules=vic20_kernal,default_panic,stdlib,vic20_hardware,loader_a000
+ro_arrays=true
+
+
+[allocation]
+zp_pointers=$C1,$C3,$FB,$FD,$39,$3B,$3D,$43,$4B
+segments=default,prgrom
+default_code_segment=prgrom
+segment_default_start=$1000
+segment_default_end=$1fff
+segment_prgrom_start=$a000
+segment_prgrom_end=$bfff
+
+[define]
+CBM=1
+CBM_VIC=1
+WIDESCREEN=0
+KEYBOARD=1
+JOYSTICKS=1
+HAS_BITMAP_MODE=1
+
+[output]
+style=single
+format=$00,$a0,prgrom:$a000:$bfff
+extension=crt
+
+

include/vic20_hardware.mfk

@@ -0,0 +1,42 @@
+#if not(CBM_VIC)
+#warn vic20_hardware module should be only used on VIC-20-compatible targets
+#endif
+
+volatile byte vic_raster @$9004
+byte vic_freq1  @$900a
+byte vic_freq2  @$900b
+byte vic_freq3  @$900c
+byte vic_volume @$9003
+byte vic_colors @$900f
+
+macro void set_volume(byte volume) {
+    vic_volume &= $f0
+    vic_volume |= volume & $f
+}
+
+macro void set_bg_color(byte color) {
+    vic_colors &= $f
+    vic_colors |= color << 4
+}
+
+macro void set_border(byte color) {
+    vic_colors &= $f8
+    vic_colors |= color & 7
+}
+
+const byte black = 0
+const byte white = 1
+const byte red = 2
+const byte cyan = 3
+const byte purple = 4
+const byte green  = 5
+const byte blue = 6
+const byte yellow = 7
+const byte orange = 8
+const byte light_orange = 9
+const byte light_red = 10
+const byte light_cyan = 11
+const byte light_purple = 12
+const byte light_green = 13
+const byte light_blue = 14
+const byte light_yellow = 15

include/vic20_kernal.mfk

@@ -6,4 +6,8 @@
 
 // CHROUT. Write byte to default output. (If not screen, must call OPEN and CHKOUT beforehands.)
 // Input: A = Byte to write.
-asm void putchar(byte a) @$FFD2 extern
+asm void putchar(byte a) @$FFD2 extern
+
+inline void new_line() {
+    putchar(13)
+}

include/zxspectrum.mfk

@@ -10,11 +10,22 @@ inline asm void putchar(byte a) {
     ? ret
 }
 
+inline void new_line() {
+    putchar(13)
+}
+
 inline asm void set_border(byte a) {
     out (254),a
     ? ret
 }
 
+inline asm void bell() {
+    ? ld hl,$6A
+    ? ld de,$105
+    ? call $3B5
+    ? ret
+}
+
 const byte black = 0
 const byte blue = 1
 const byte red = 2