CPC464 Restart - Revision history

Mahjongg at 20:59, 16 January 2016

2016-01-16T20:59:13Z

← Older revision		Revision as of 20:59, 16 January 2016
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	{{Project		{{Project
	\|Name= CPC464 Restart		\|Name=CPC464 Restart
			\|Picture=Cpc464.computer.750pix.jpg
			\|Omschrijving=Getting a CPC464 without monitor to work
	\|Status=Completed		\|Status=Completed
	\|Contact= ~~mahjongg~~		\|Contact=Mahjongg
	}}		}}

Mahjongg at 17:24, 24 October 2015

2015-10-24T17:24:09Z

← Older revision		Revision as of 17:24, 24 October 2015
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	Fix the keys, and try to load a game from cassette.		Fix the keys, and try to load a game from cassette.

	Some time ago the CPC464, and about a hundred other home computers that where in my possession, have been donated (in bruikleen gegeven) to awesome space, so that means a status change here to "Completed".		Some time ago the CPC464, and about a hundred other home computers that where in my possession, have been donated (in bruikleen gegeven) to awesome space, http://awesomespace.nl so that means a status change here to "Completed".

Mahjongg at 16:55, 24 October 2015

2015-10-24T16:55:12Z

← Older revision		Revision as of 16:55, 24 October 2015
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	{{Project		{{Project
	\|Name= CPC464 Restart		\|Name= CPC464 Restart
	\|Status=~~In progress~~		\|Status=Completed
	\|Contact= mahjongg		\|Contact= mahjongg
	}}		}}
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	Fix the keys, and try to load a game from cassette.		Fix the keys, and try to load a game from cassette.

	Some time ago the CPC464, and about a hundred other home computers that where in my possession, have been donated (in bruikleen gegeven) to awesome space, so that means a status change here to "~~finished~~".		Some time ago the CPC464, and about a hundred other home computers that where in my possession, have been donated (in bruikleen gegeven) to awesome space, so that means a status change here to "Completed".

Mahjongg at 16:54, 24 October 2015

2015-10-24T16:54:22Z

← Older revision		Revision as of 16:54, 24 October 2015
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	Fix the keys, and try to load a game from cassette.		Fix the keys, and try to load a game from cassette.

			Some time ago the CPC464, and about a hundred other home computers that where in my possession, have been donated (in bruikleen gegeven) to awesome space, so that means a status change here to "finished".

Mahjongg: started page CPC454 Restart.

2014-08-22T11:53:08Z

started page CPC454 Restart.

New page

{{Project
|Name= CPC464 Restart
|Status=In progress
|Contact= mahjongg
}}

'''CPC464 Restart''' is a project where an old Amstrad CPC464 (without monitor) is restored to working order again.

First issue is that the original CPC464 came with a monitor that had a built in power supply, the monitor could be either color or monochrome, and the CPC464 needs 5V @ 2A.

The power supply isn't a problem, as there are plenty of power supplies at Revspace that can be used.
The only PAL monitor though we have ready is a PAL monitor that only has a composite input, not a SCART one, which was a bit of a problem because the only documentation I could find about adding your own monitor were about using the RGB input via SCART using a SCART TV/Monitor.

After studying the schematics, and connector pinouts of the 6-pin DIN monitor connection, I came to the conclusion that the center pin was used for a "Luminance" signal, and that the signal also included sync, so this seemed to be a PAL composite (monochrome) output.

So a power cable with 4mm banana plugs was made, and a 5-pin DIN to RCA video cable, and that did the trick, we got a nice and crisp video output.
The CPC464 happened to have a 64K memory expansion built inside, so BASIC reported this was a 128K machine!

The machine worked but was a bit "flaky", and one of the keys didn't work.

Next:
Fix the keys, and try to load a game from cassette.