Big LED Screen - Revision history

Shkoo: Fix picture to depict proper screen

2025-03-08T23:43:46Z

Fix picture to depict proper screen

← Older revision		Revision as of 16:43, 8 March 2025
Line 6:		Line 6:
	The sign in its original form when we found it and had to figure out how to reverse engineer it.		The sign in its original form when we found it and had to figure out how to reverse engineer it.

	[[File:~~Nbbigledsignhackonme~~.jpg\|~~800px~~]]		[[File:Big LED screen.jpg\|800x800px]]

	=== Overview ===		=== Overview ===

Lxpk at 14:41, 5 January 2022

2022-01-05T14:41:29Z

← Older revision		Revision as of 07:41, 5 January 2022
Line 1:		Line 1:
	{{~~art~~}}		{{LED}}

	{{headerbox}}'''The Big LED Screen''' is Noisebridge's first piece of LED art, a big LED screen salvaged and made to work running Conway's Game of Life since [[83c]].		{{headerbox}}'''The Big LED Screen''' is Noisebridge's first piece of LED art, a big LED screen salvaged and made to work running Conway's Game of Life since [[83c]].

Lxpk at 14:26, 5 January 2022

2022-01-05T14:26:56Z

← Older revision		Revision as of 07:26, 5 January 2022
Line 1:		Line 1:
	{{art}}		{{art}}

	= The Big LED Screen =		{{headerbox}}'''The Big LED Screen''' is Noisebridge's first piece of LED art, a big LED screen salvaged and made to work running Conway's Game of Life since [[83c]].
	Noisebridge ~~has had~~ a big LED screen salvaged and made to work running Conway's Game of Life since [[83c]].		{{boxend}}

			The sign in its original form when we found it and had to figure out how to reverse engineer it.

			[[File:Nbbigledsignhackonme.jpg\|800px]]

	=== Overview ===		=== Overview ===

Lxpk at 18:30, 22 December 2021

2021-12-22T18:30:30Z

← Older revision		Revision as of 11:30, 22 December 2021
Line 1:		Line 1:
			{{art}}

	= The Big LED Screen =		= The Big LED Screen =
			Noisebridge has had a big LED screen salvaged and made to work running Conway's Game of Life since [[83c]].

	=== Overview ===		=== Overview ===

Zross1: /* Getting the source */

2017-05-02T23:06:33Z

Getting the source

← Older revision		Revision as of 16:06, 2 May 2017
Line 125:		Line 125:

	=== Getting the source ===		=== Getting the source ===
			The source is available on GitHub at the following location: https://github.com/miloh/bigledscreen/
			A guide for using GitHub can be found here https://guides.github.com/activities/hello-world/

			'''The following is historical'''
	The source is in a mercurial repository on [[pony]]. Point your mercurial client at http://pony.local/d3/nils/bigledscreen to pull down a copy of it.		The source is in a mercurial repository on [[pony]]. Point your mercurial client at http://pony.local/d3/nils/bigledscreen to pull down a copy of it.

51.15.40.233: Undo revision 57596 by 185.22.67.15 (talk) - rv vandalism

2017-04-04T07:58:50Z

Undo revision 57596 by 185.22.67.15 (talk) - rv vandalism

← Older revision		Revision as of 00:58, 4 April 2017
Line 15:		Line 15:
	** ''I have a somewhat different version. The missing chip I think you are referring to is a floppy drive controller. In my version the floppy drive is connected to the LED driver board there on the top left connector which then feeds through and shares the same ISA connector. -dpg (sorry if this was an inappropriate way to add a comment.)''		** ''I have a somewhat different version. The missing chip I think you are referring to is a floppy drive controller. In my version the floppy drive is connected to the LED driver board there on the top left connector which then feeds through and shares the same ISA connector. -dpg (sorry if this was an inappropriate way to add a comment.)''

	~~Знакомства Москва~~, ~~Ксения~~, ~~32 года~~ - ~~Знакомства на Loveawake~~.Ru		==== Buffer board ====

			Tonight (2008-12-30) Josh worked from the backend up a bit, but eventually gave up. He then moved to the ISA frontside and worked down, which was far more productive.

			The device appears to sit at ISA IO ports 0x180 through 0x183. The addresses are decoded by U51 (74688 comparator), which then hits the OE2 on U52-19 (74541 driver iirc). This is then used to feed U53 and U54 (both 74574 D-flip-flops). These appear to be there to combat fan-out. He's not entirely certain where these go, but it seemed like they were going into the RAMs.

			The low bits of the ISA address selection sit on the rightmost two pins on the top row of the header, SA1 and SA0, in that order (Just hook the connector up and use the multimeter if that's nonsensical). I haven't traced them through yet; I was in the middle of it when my time ran out. They look to run over to the empty chip socket on the right side of the board. Most traces tend to terminate at this chip socket, so most likely we won't be able to use the display logic on the buffer board.

	==== Daughterboards ====		==== Daughterboards ====

185.22.67.15: хочу познакомится с девушкой из америки

2017-04-03T07:01:21Z

хочу познакомится с девушкой из америки

← Older revision		Revision as of 00:01, 3 April 2017
Line 15:		Line 15:
	** ''I have a somewhat different version. The missing chip I think you are referring to is a floppy drive controller. In my version the floppy drive is connected to the LED driver board there on the top left connector which then feeds through and shares the same ISA connector. -dpg (sorry if this was an inappropriate way to add a comment.)''		** ''I have a somewhat different version. The missing chip I think you are referring to is a floppy drive controller. In my version the floppy drive is connected to the LED driver board there on the top left connector which then feeds through and shares the same ISA connector. -dpg (sorry if this was an inappropriate way to add a comment.)''

	~~==== Buffer board ====~~		Знакомства Москва, Ксения, 32 года - Знакомства на Loveawake.Ru

	~~Tonight (2008-12-30) Josh worked from the backend up a bit~~, ~~but eventually gave up. He then moved to the ISA frontside and worked down, which was far more productive.~~

	~~The device appears to sit at ISA IO ports 0x180 through 0x183. The addresses are decoded by U51 (74688 comparator)~~, ~~which then hits the OE2 on U52-19 (74541 driver iirc). This is then used to feed U53 and U54 (both 74574 D-flip-flops). These appear to be there to combat fan~~-~~out. He's not entirely certain where these go, but it seemed like they were going into the RAMs.~~

	The low bits of the ISA address selection sit on the rightmost two pins on the top row of the header, SA1 and SA0, in that order (Just hook the connector up and use the multimeter if that's nonsensical). I haven't traced them through yet; I was in the middle of it when my time ran out. They look to run over to the empty chip socket on the right side of the board. Most traces tend to terminate at this chip socket, so most likely we won't be able to use the display logic on the buffer board.

	==== Daughterboards ====		==== Daughterboards ====

72.26.176.185: /* History */

2015-01-01T01:39:52Z

History

← Older revision		Revision as of 18:39, 31 December 2014
Line 12:		Line 12:
	* The 386 connects via ISA to a "buffer board" which looks to be a memory buffer and power conditioner.		* The 386 connects via ISA to a "buffer board" which looks to be a memory buffer and power conditioner.
	* The "buffer board" has most traces terminating to a socket with a missing chip, so we don't know what happened here.		* The "buffer board" has most traces terminating to a socket with a missing chip, so we don't know what happened here.

			** ''I have a somewhat different version. The missing chip I think you are referring to is a floppy drive controller. In my version the floppy drive is connected to the LED driver board there on the top left connector which then feeds through and shares the same ISA connector. -dpg (sorry if this was an inappropriate way to add a comment.)''

	==== Buffer board ====		==== Buffer board ====

Crw: Undo revision 41919 by JohnyRadio (talk)

2014-05-09T06:32:19Z

Undo revision 41919 by JohnyRadio (talk)

← Older revision		Revision as of 23:32, 8 May 2014
Line 17:		Line 17:
	Tonight (2008-12-30) Josh worked from the backend up a bit, but eventually gave up. He then moved to the ISA frontside and worked down, which was far more productive.		Tonight (2008-12-30) Josh worked from the backend up a bit, but eventually gave up. He then moved to the ISA frontside and worked down, which was far more productive.

	The device appears to sit at ISA IO ~~por<gallery mode="packed-hover">~~		The device appears to sit at ISA IO ports 0x180 through 0x183. The addresses are decoded by U51 (74688 comparator), which then hits the OE2 on U52-19 (74541 driver iirc). This is then used to feed U53 and U54 (both 74574 D-flip-flops). These appear to be there to combat fan-out. He's not entirely certain where these go, but it seemed like they were going into the RAMs.
	~~File:Ct3-06.jpg\|''[[commons:Psetta maxima\|Psetta maxima]]'' (Turbot)~~
	~~File:044.jpg\|''[[commons:Psetta maxima\|Psetta maxima]]'' (Turbot)~~
	~~File:045.jpg\|''[[commons:Psetta maxima\|Psetta maxima]]'' (Turbot)~~
	~~File:046.jpg\|''[[commons:Psetta maxima\|Psetta maxima]]'' (Turbot)~~
	~~File:047.jpg\|''[[commons:Psetta maxima\|Psetta maxima]]'' (Turbot)~~
	~~File:048.jpg\|''[[commons:Psetta maxima\|Psetta maxima]]'' (Turbot)~~
	~~</gallery>~~
	ts 0x180 through 0x183. The addresses are decoded by U51 (74688 comparator), which then hits the OE2 on U52-19 (74541 driver iirc). This is then used to feed U53 and U54 (both 74574 D-flip-flops). These appear to be there to combat fan-out. He's not entirely certain where these go, but it seemed like they were going into the RAMs.

	The low bits of the ISA address selection sit on the rightmost two pins on the top row of the header, SA1 and SA0, in that order (Just hook the connector up and use the multimeter if that's nonsensical). I haven't traced them through yet; I was in the middle of it when my time ran out. They look to run over to the empty chip socket on the right side of the board. Most traces tend to terminate at this chip socket, so most likely we won't be able to use the display logic on the buffer board.		The low bits of the ISA address selection sit on the rightmost two pins on the top row of the header, SA1 and SA0, in that order (Just hook the connector up and use the multimeter if that's nonsensical). I haven't traced them through yet; I was in the middle of it when my time ran out. They look to run over to the empty chip socket on the right side of the board. Most traces tend to terminate at this chip socket, so most likely we won't be able to use the display logic on the buffer board.

JohnyRadio at 00:10, 6 May 2014

2014-05-06T00:10:14Z

← Older revision		Revision as of 17:10, 5 May 2014
Line 17:		Line 17:
	Tonight (2008-12-30) Josh worked from the backend up a bit, but eventually gave up. He then moved to the ISA frontside and worked down, which was far more productive.		Tonight (2008-12-30) Josh worked from the backend up a bit, but eventually gave up. He then moved to the ISA frontside and worked down, which was far more productive.

	The device appears to sit at ISA IO ~~ports~~ 0x180 through 0x183. The addresses are decoded by U51 (74688 comparator), which then hits the OE2 on U52-19 (74541 driver iirc). This is then used to feed U53 and U54 (both 74574 D-flip-flops). These appear to be there to combat fan-out. He's not entirely certain where these go, but it seemed like they were going into the RAMs.		The device appears to sit at ISA IO por<gallery mode="packed-hover">
			File:Ct3-06.jpg\|''[[commons:Psetta maxima\|Psetta maxima]]'' (Turbot)
			File:044.jpg\|''[[commons:Psetta maxima\|Psetta maxima]]'' (Turbot)
			File:045.jpg\|''[[commons:Psetta maxima\|Psetta maxima]]'' (Turbot)
			File:046.jpg\|''[[commons:Psetta maxima\|Psetta maxima]]'' (Turbot)
			File:047.jpg\|''[[commons:Psetta maxima\|Psetta maxima]]'' (Turbot)
			File:048.jpg\|''[[commons:Psetta maxima\|Psetta maxima]]'' (Turbot)
			</gallery>
			ts 0x180 through 0x183. The addresses are decoded by U51 (74688 comparator), which then hits the OE2 on U52-19 (74541 driver iirc). This is then used to feed U53 and U54 (both 74574 D-flip-flops). These appear to be there to combat fan-out. He's not entirely certain where these go, but it seemed like they were going into the RAMs.

	The low bits of the ISA address selection sit on the rightmost two pins on the top row of the header, SA1 and SA0, in that order (Just hook the connector up and use the multimeter if that's nonsensical). I haven't traced them through yet; I was in the middle of it when my time ran out. They look to run over to the empty chip socket on the right side of the board. Most traces tend to terminate at this chip socket, so most likely we won't be able to use the display logic on the buffer board.		The low bits of the ISA address selection sit on the rightmost two pins on the top row of the header, SA1 and SA0, in that order (Just hook the connector up and use the multimeter if that's nonsensical). I haven't traced them through yet; I was in the middle of it when my time ran out. They look to run over to the empty chip socket on the right side of the board. Most traces tend to terminate at this chip socket, so most likely we won't be able to use the display logic on the buffer board.