bus/spectrum: Add Kempston Mouse Interface slot device #14908
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dotkoval
commented
Feb 1, 2026
dotkoval
commented
- classic 2-button mouse interface
- available for classic ZX Spectrum models (48/128/+2/+3)
* classic 2-button mouse interface * available for classic ZX Spectrum models (48/128/+2/+3)
| // The right key was the primary key in most implementations in the 1980s–1990s. | ||
| PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_BUTTON5) PORT_NAME("Mouse Button Right") PORT_CODE(MOUSECODE_BUTTON2) | ||
| PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_BUTTON4) PORT_NAME("Mouse Button Left") PORT_CODE(MOUSECODE_BUTTON1) |
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That doesn't mean it should map arbitrarily. It's IPT_BUTTON1 / IPT_BUTTON2, numbers are relative to your device, leaving the user to assign inputs if the defaults aren't satisfactory.
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I think that mapping matches what I did before for the clones without exp slot.
I would prefer to keep them consistent and fix everywhere in one shot.
Let's not make him responsible for my mistakes.
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Makes sense! Thanks for pointing this out. I've updated it to use IPT_BUTTON1/IPT_BUTTON2. I kept the PORT_CODE(MOUSECODE_...) defaults to ensure correct 2-button behaviour, as otherwise BUTTON2 maps to the middle mouse button by default.
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| **********************************************************************/ | ||
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| // Original Kempston mouse interface description: |
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Move up, inside header comment
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Rgr! Fixed in the latest commit :)
* Use IPT_BUTTON1/IPT_BUTTON2 as logical device buttons * Override default host mapping to ensure correct 2-button behavior
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| // license:BSD-3-Clause | |||
| // copyright-holders: Oleksandr Kovalchuk | |||
| // Thanks to: Nigel Barnes (based on kempjoy implementation) | |||
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No need for the Thanks, it's a very common device template.
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Just to check - should I remove the "Thanks" line?
I think expressing appreciation is never a bad thing :) but if it doesn't match the usual template or project rules, I'll gladly remove it.
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Yes, remove, it's thanking me though I haven't contributed to this file.
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| //------------------------------------------------- | ||
| // input_ports - device-specific input ports |
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I think we don't like these mumbling comments anymore. Anybody confirm?
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I personally don't see the point to them
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Cleaned up the comments according to your suggestions.
| //------------------------------------------------- | ||
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| static INPUT_PORTS_START( kempmouse ) | ||
| PORT_START("mouse_x") /* 0xFBDF */ |
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...and block comments for single line
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