AMX Mouse - Revision history

Phi2x: /* Links */

2025-02-19T07:40:19Z

Links

← Older revision		Revision as of 07:40, 19 February 2025
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	* [http://www.cpc-power.com/index.php?page=detail&num=4286 CPC game base from CPC Power]		* [http://www.cpc-power.com/index.php?page=detail&num=4286 CPC game base from CPC Power]

	[[Category:Input Device]] [[Category:Peripherals]] [[Category:Manual~~]][[Category:Amstrad Products~~]]		[[Category:Input Device]] [[Category:Peripherals]] [[Category:Manual]]

KSL at 10:38, 8 June 2024

2024-06-08T10:38:03Z

← Older revision		Revision as of 10:38, 8 June 2024
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	* [[The Advanced OCP Art Studio]]		* [[The Advanced OCP Art Studio]]
	* [[Cosmos\|Cosmos]]		* [[Cosmos\|Cosmos]]
			* [[On File]]

	== Download ==		== Download ==

Phi2x: /* Pictures */

2024-06-05T23:57:26Z

Pictures

← Older revision		Revision as of 23:57, 5 June 2024
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	<gallery>		<gallery>
	Amx mouse img1.jpg		Amx mouse img1.jpg\|Package
	Amx mouse img3.jpg		Amx mouse img3.jpg\|Top view
	Amx mouse img2.jpg		Amx mouse img2.jpg\|Mouse
	</gallery>		</gallery>

Phi2x: /* Pictures */

2024-06-05T23:56:07Z

Pictures

← Older revision		Revision as of 23:56, 5 June 2024
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	Image:AMX Mouse Connection Guide (photo by jrp king).jpg\|Connection Guide		Image:AMX Mouse Connection Guide (photo by jrp king).jpg\|Connection Guide
	Image:ACU8510-105.jpg\|Advert (ACU Oct 1985)		Image:ACU8510-105.jpg\|Advert (ACU Oct 1985)
			</gallery>

			<gallery>
			Amx mouse img1.jpg
			Amx mouse img3.jpg
			Amx mouse img2.jpg
	</gallery>		</gallery>

Arnoldemu: /* AMX Mouse Hardware Clones */

2015-08-23T13:07:04Z

AMX Mouse Hardware Clones

← Older revision		Revision as of 13:07, 23 August 2015
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	* [[PS2Mouse]] (DIY by Bryce)		* [[PS2Mouse]] (DIY by Bryce)

	~~Moreover, the~~ [[Dk'tronics Mouse Interface]] ~~seems to be~~ AMX ~~compatible, too. (Not confirmed if~~ it ~~is really compatible, but~~ the ~~circuit looks very similar~~.~~) (though dk~~'tronics ~~seems to support only one button, not three buttons~~.~~) (Tested 24~~.9.14 by ~~user Spookspring does not appear to work at all)~~		== Compatible mice/Interfaces ==

			The [[Dk'tronics Mouse Interface]] is compatible with the AMX in that it uses joystick directions for the mouse and joystick fire for the buttons. The mice are not interchangeable; the Dk'tronics mouse interface uses a mouse with a standard joystick connector. As confirmed by user Spookspring on 29.9.14, only a single mouse button is supported by the Dk'tronics interface.

	== Other ways to connect a mouse to the CPC ==		== Other ways to connect a mouse to the CPC ==

Arnoldemu: /* Technical */

2015-08-23T13:01:30Z

Technical

← Older revision		Revision as of 13:01, 23 August 2015
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	jp update_loop		jp update_loop

			Selecting the joystick for longer doesn't appear to change the value. The value is updated when the joystick is deselected.

	Contains the following ICs:		Contains the following ICs:

Arnoldemu at 12:19, 23 August 2015

2015-08-23T12:19:22Z

← Older revision		Revision as of 12:19, 23 August 2015
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	Note II: Looking at the photos, it seems that /joystick1 (keyb row 9 select) is wired to the multivibrator, so the mickey timings may be software controlled; accordingly, software would be required to deselect keyboard row 9 between each read.		Note II: Looking at the photos, it seems that /joystick1 (keyb row 9 select) is wired to the multivibrator, so the mickey timings may be software controlled; accordingly, software would be required to deselect keyboard row 9 between each read.

	Confirmed: Software ~~MUST deselect~~ keyboard row 9 to read the mouse correctly.		Confirmed: Software will select keyboard row 9 to read the mouse, but then MUST deselect it to read the mouse correctly.

	For example, the loop here doesn't work:		For example, the loop here doesn't work:

Arnoldemu at 12:17, 23 August 2015

2015-08-23T12:17:35Z

← Older revision		Revision as of 12:17, 23 August 2015
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	ld bc,&f792 ;; PPI port A input		ld bc,&f792 ;; PPI port A input
			out (c),c

			ld bc,&f649 ;; select keyboard row 9 (joystick 0)
	out (c),c		out (c),c

Line 70:		Line 73:
	update_loop:		update_loop:

	ld bc,&f649		ld bc,&f649 ;; select keyboard row 9 (joystick 0)
	out (c),c		out (c),c

	ld b,&f4		ld b,&f4
	in a,(c)		in a,(c)

	ld bc,&f640		ld bc,&f640 ;; deselect keyboard row 9 (by selecting keyboard row 0)
	out (c),c		out (c),c

	jp update_loop		jp update_loop

Arnoldemu: /* Technical */

2015-08-23T12:16:13Z

Technical

← Older revision		Revision as of 12:16, 23 August 2015
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	For example, the loop here doesn't work:		For example, the loop here doesn't work:

	~~[code]~~		ld bc,&f40e ;; PSG register 14 (keyboard)
	ld bc,&f40e ;; PSG register 14 (keyboard)		out (c),c
	out (c),c
			ld bc,&f6c0
	ld bc,&f6c0		out (c),c
	out (c),c
			ld bc,&f600
	ld bc,&f600		out (c),c
	out (c),c
			ld bc,&f792 ;; PPI port A input
	ld bc,&f792 ;; PPI port A input		out (c),c
	out (c),c
			update_loop:
	update_loop:		ld b,&f4
	ld b,&f4		in a,(c)
	in a,(c)		jp update_loop
	jp update_loop
	~~[/code]~~

	whereas the following does work:		whereas the following does work:

	~~[code]~~		ld bc,&f40e ;; PSG register 14 (keyboard)
	ld bc,&f40e ;; PSG register 14 (keyboard)		out (c),c
	out (c),c
			ld bc,&f6c0
	ld bc,&f6c0		out (c),c
	out (c),c
			ld bc,&f600
	ld bc,&f600		out (c),c
	out (c),c
			ld bc,&f792 ;; PPI port A input
	ld bc,&f792 ;; PPI port A input		out (c),c
	out (c),c
			update_loop:
	update_loop:
			ld bc,&f649
	ld bc,&f649		out (c),c
	out (c),c
			ld b,&f4
	ld b,&f4		in a,(c)
	in a,(c)
			ld bc,&f640
	ld bc,&f640		out (c),c
	out (c),c		jp update_loop
	jp update_loop
	~~[/code]~~

Arnoldemu: /* Technical */

2015-08-23T12:14:18Z

Technical

@@ Line 13: / Line 13: @@
 == Technical ==
-The AMX Art software uses the CPC's 300Hz interrupt to read the joystick port (at least it tries to do that, while moving the mouse pointer, the software accidently disables IRQs, and so, misses some interrupts). This is giving it a relative low resolution of max 300 mickeys per second (or actually less, due to the missed IRQs).
+The AMX Art software uses the CPC's 300Hz interrupt to read joystick port 0 (at least it tries to do that, while moving the mouse pointer, the software accidently disables IRQs, and so, misses some interrupts). This is giving it a relative low resolution of max 300 mickeys per second (or actually less, due to the missed IRQs).
-The AMX Interface hardware basically converts the incoming mouse signals to joystick signals, issuing LOW pulses (per mickey) on the corresponding direction lines. The protocol is thus very simple (unlike modern RS232 and PS/2 mice, the hardware doesn't contain any motion counters).
+The AMX Interface hardware basically converts the incoming mouse signals to joystick 0 signals, issuing LOW pulses on the corresponding direction lines. The interface doesn't report anything for joystick 1 when connected to the CPC's joystick port (which provides both joystick 0 and joystick 1 input).
-   Row9.Bit0 Joy1up    LOW for 1/300s per mickey, when mouse moved up
+In addition the AMX mouse doesn't appear to clash with the keyboard.
-   Row9.Bit1 Joy1down  LOW for 1/300s per mickey, when mouse moved down
-   Row9.Bit2 Joy1left  LOW for 1/300s per mickey, when mouse moved left
+The protocol is thus very simple (unlike modern RS232 and PS/2 mice, the hardware doesn't contain any motion counters).
-   Row9.Bit3 Joy1right LOW for 1/300s per mickey, when mouse moved right
    Row9.Bit5 Joy1fire1 LOW when Right mouse button pressed
    Row9.Bit4 Joy1fire2 LOW when Left mouse button pressed
@@ Line 27: / Line 31: @@
 Note: The exact hardware timings are '''unknown''', the values "1/300s" in the above description assume that the AMX '''hardware''' timings were designed to match up with the 300Hz AMX '''software''' timings.
-Note II: Looking at the photos, it seems that /joystick1 (keyb row 9 select) is wired to the multivibrator, so the mickey timings may be software controlled; accordingly, software would be required to deselect keyb row 9 between each read.
+Note II: Looking at the photos, it seems that /joystick1 (keyb row 9 select) is wired to the multivibrator, so the mickey timings may be software controlled; accordingly, software would be required to deselect keyboard row 9 between each read.
 Contains the following ICs: