(MESS) notes

src/mess/drivers/amust.c

@@ -4,14 +4,23 @@
 
 Amust Compak
 
+A magazine called it the Amust Executive 816. Trying to confirm if in fact
+it's the same computer.
+
 2014-03-21 Skeleton driver. [Robbbert]
 
 An unusual-looking CP/M computer.
 There are no manuals or schematics known to exist.
 The entire driver is guesswork.
-A blurry photo of the board shows 2x 8251, 2x 8255, 8253, uPD765 and a 6845.
+The board has LH0080 (Z80A), 2x 8251, 2x 8255, 8253, uPD765A and a HD46505SP-2.
 The videoram is a 6116 RAM. There is a piezo beeper. There are 3 crystals,
-but the writing is too blurred.
+X1 = 4.9152 (serial chips?), X2 = 16 (CPU), X3 = 14.31818 MHz (Video?).
+Floppy capacity: 790k
+Their are numerous jumpers, all of which perform unknown functions.
+
+The keyboard is a plug-in unit, same idea as Kaypro and Zorba. It has these
+chips: INS8035N-6, F74145, 74LS373N, SN75451BP, 2716 rom with label KBD-3.
+Crystal: 3.579545 MHz
 
 The main rom is identical between the 2 halves, except that the initial
 crtc parameters are slightly different. I've chosen to ignore the first
@@ -26,6 +35,7 @@ B = Boot from floppy
 ToDo:
 - Everything
 - Need software
+- If booting straight to CP/M, the load message should be in the middle of the screen.
 
 ****************************************************************************/
 
@@ -245,7 +255,7 @@ DRIVER_INIT_MEMBER( amust_state, amust )
 
 static MACHINE_CONFIG_START( amust, amust_state )
 	/* basic machine hardware */
-	MCFG_CPU_ADD("maincpu",Z80, XTAL_16MHz / 4) // guess clock
+	MCFG_CPU_ADD("maincpu",Z80, XTAL_16MHz / 4)
 	MCFG_CPU_PROGRAM_MAP(amust_mem)
 	MCFG_CPU_IO_MAP(amust_io)
 	MCFG_CPU_VBLANK_INT_DRIVER("screen", amust_state, irq_vs)
@@ -262,7 +272,7 @@ static MACHINE_CONFIG_START( amust, amust_state )
 	MCFG_GFXDECODE_ADD("gfxdecode", "palette", amust)
 
 	/* Devices */
-	MCFG_MC6845_ADD("crtc", MC6845, "screen", XTAL_16MHz / 8, amust_crtc)
+	MCFG_MC6845_ADD("crtc", H46505, "screen", XTAL_14_31818MHz / 8, amust_crtc)
 	MCFG_ASCII_KEYBOARD_ADD("keybd", keyboard_intf)
 	MCFG_UPD765A_ADD("fdc", false, true)
 	MCFG_FLOPPY_DRIVE_ADD("fdc:0", amust_floppies, "525dd", floppy_image_device::default_floppy_formats)
@@ -277,6 +287,9 @@ ROM_START( amust )
 	ROM_REGION( 0x800, "chargen", 0 )
 	ROM_LOAD( "cg4.rom", 0x000, 0x800, CRC(52e7b9d8) SHA1(cc6d457634eb688ccef471f72bddf0424e64b045) )
 
+	ROM_REGION( 0x800, "keyboard", 0 )
+	ROM_LOAD( "kbd_3.rom", 0x000, 0x800, NO_DUMP )
+
 	ROM_REGION( 0x800, "videoram", ROMREGION_ERASE00 )
 ROM_END
 

src/mess/drivers/pencil2.c

@@ -64,6 +64,8 @@ but is banked out of view of a BASIC program.
 KNOWN CARTS
 SD-BASIC V1.0
 SD-BASIC V2.0
+Zaxxon
+Smurf
 
 
 ToDo:
@@ -87,12 +89,11 @@ class pencil2_state : public driver_device
 {
 public:
 	pencil2_state(const machine_config &mconfig, device_type type, const char *tag)
-		: driver_device(mconfig, type, tag),
+		: driver_device(mconfig, type, tag)
-		m_maincpu(*this, "maincpu"),
+		, m_maincpu(*this, "maincpu")
-		m_centronics(*this, "centronics"),
+		, m_centronics(*this, "centronics")
-		m_cass(*this, "cassette")
+		, m_cass(*this, "cassette")
-	{
+	{}
-	}
 
 	DECLARE_WRITE8_MEMBER(port10_w);
 	DECLARE_WRITE8_MEMBER(port30_w);
@@ -103,13 +104,13 @@ public:
 	DECLARE_WRITE_LINE_MEMBER(write_centronics_busy);
 	DECLARE_CUSTOM_INPUT_MEMBER(printer_ready_r);
 	DECLARE_CUSTOM_INPUT_MEMBER(printer_ack_r);
+private:
 	virtual void machine_reset();
+	int m_centronics_busy;
+	int m_centronics_ack;
 	required_device<cpu_device> m_maincpu;
 	required_device<centronics_device> m_centronics;
 	required_device<cassette_image_device> m_cass;
-
-	int m_centronics_busy;
-	int m_centronics_ack;
 };
 
 static ADDRESS_MAP_START(pencil2_mem, AS_PROGRAM, 8, pencil2_state)