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hhtg1968
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Joined: 25/05/2023
Location: Germany
Posts: 136

Posted: 03:02pm 09 Jan 2025

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Hello. I want to connect a ps/2 mouse to my cmm2 gen1.

in the documentation i found an doc image.

i can connect to pin 33 and 32 and ground on the gpio. but where can i connect the 5v from the mouse?

there are 3.v pins, no 5v pins...

sorry for the silly question.

greetings from germany.

JohnS
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Joined: 18/11/2011
Location: United Kingdom
Posts: 4038

Posted: 03:50pm 09 Jan 2025

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I think it means you need to provide 5V.

John

Mixtel90

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Joined: 05/10/2019
Location: United Kingdom
Posts: 7858

Posted: 04:05pm 09 Jan 2025

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Pin 2 or pin 4 (manual page 10)

TBH I don't remember the CMM2 having any support for PS2 at all...

.
Edited 2025-01-10 02:12 by Mixtel90

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

Volhout
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Joined: 05/03/2018
Location: Netherlands
Posts: 5056

Posted: 04:07pm 09 Jan 2025

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Hi

+5V is available at pin 2 and 4 of the 40 pin connector.

Volhout

PicomiteVGA PETSCII ROBOTS

Mixtel90

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Joined: 05/10/2019
Location: United Kingdom
Posts: 7858

Posted: 06:38pm 09 Jan 2025

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My brain must be going...
Of course the CMM2 supports direct connection of a PS2 mouse. Technically it's a USB mouse that supports the PS2 protocol though. It works fine - I modified my CMM2. It's on channel 0.
Seems like such a long time ago now....

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

hhtg1968
Senior Member

Joined: 25/05/2023
Location: Germany
Posts: 136

Posted: 08:22pm 09 Jan 2025

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Volhout said Hi

+5V is available at pin 2 and 4 of the 40 pin connector.

Volhout

Thank you very much.

hhtg1968
Senior Member

Joined: 25/05/2023
Location: Germany
Posts: 136

Posted: 09:11am 10 Jan 2025

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And it runs well...

you can see the mouse "cursor"...

Thanks again.

thwill

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Joined: 16/09/2019
Location: United Kingdom
Posts: 4301

Posted: 09:26am 10 Jan 2025

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Just an observation @hhtg1968 but NEXT statements in MMBasic don't require the variable name, e.g. you can just write:

For i = 1 To 10
For j = 20 To 30
Print i, j
Next ' No j required
Next ' No i required

And by doing so you would save 110 variable lookups, which is a worthwhile saving as variable lookup is quite an expensive operation.

Best wishes,

Tom

MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures

Chopperp

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Joined: 03/01/2018
Location: Australia
Posts: 1095

Posted: 11:15am 10 Jan 2025

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Quote NEXT statements in MMBasic don't require the variable name

From the manual

Quote If no ‘counter-variable’ is specified the NEXT will default to the innermost loop.

Thanks Tom. I didn't know that either

ChopperP

hhtg1968
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Joined: 25/05/2023
Location: Germany
Posts: 136

Posted: 10:26pm 10 Jan 2025

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thwill said Just an observation @hhtg1968 but NEXT statements in MMBasic don't require the variable name, e.g. you can just write:

For i = 1 To 10
For j = 20 To 30
Print i, j
Next ' No j required
Next ' No i required

And by doing so you would save 110 variable lookups, which is a worthwhile saving as variable lookup is quite an expensive operation.

Best wishes,

Tom

thank you for the notice. i had measured it, it is actually faster...

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