Model 200 RAM - Revision history

Bkw: /* DIY Modern Replacments */

2022-09-18T19:38:42Z

DIY Modern Replacments

← Older revision		Revision as of 19:38, 18 September 2022
Line 10:		Line 10:
	[[File:TANDY_26-3866.svg\|frameless\|link={{filepath:TANDY_26-3866.svg}}]]		[[File:TANDY_26-3866.svg\|frameless\|link={{filepath:TANDY_26-3866.svg}}]]

	=~~DIY~~ Modern ~~Replacments~~=		=Modern Replacements=

	https://github.com/bkw777/TANDY_200_RAM		https://github.com/bkw777/TANDY_200_RAM

2022-09-18T18:46:43Z

DIY Modern Replacment

← Older revision		Revision as of 18:46, 18 September 2022
Line 10:		Line 10:
	[[File:TANDY_26-3866.svg\|frameless\|link={{filepath:TANDY_26-3866.svg}}]]		[[File:TANDY_26-3866.svg\|frameless\|link={{filepath:TANDY_26-3866.svg}}]]

	=DIY Modern ~~Replacment~~=		=DIY Modern Replacments=

	https://github.com/bkw777/TANDY_200_RAM		https://github.com/bkw777/TANDY_200_RAM
			<gallery>
			File:TANDY_200_RAM.jpg
			File:TANDY_200_Dual_RAM.jpg
			File:TANDY_200_Dual_RAM_tsop_14mm.jpg
			</gallery>

	<!-- -- all dead links now --		<!-- -- all dead links now --

2022-09-18T00:18:33Z

← Older revision		Revision as of 00:18, 18 September 2022
Line 1:		Line 1:
	The model 200 comes with 24k built in, and supports up to 2 more banks of 24k in the form of ceramic dip modules that plug into the Option RAM #1 & #2 sockets.		The model 200 comes with 24k built in, and supports up to 2 more banks of 24k in the form of ceramic dip modules that plug into the Option RAM #1 & #2 sockets.

	= ~~Original Ceramic Modules~~		=TANDY 26-3866=
	The original 24K module was Catalog Number 26-3866.		The original 24K module was Catalog Number 26-3866.<br>
			This is a ceramic DIP carrier with 3 8k sram chips and a 40H138 to decode A13 & A14 into 3 different /CS for the individual SRAM chips.

	[[File:TANDY_26-3866_top.jpg\|200px\|link={{filepath:TANDY_26-3866_top.jpg}}]]		[[File:TANDY_26-3866_top.jpg\|200px\|link={{filepath:TANDY_26-3866_top.jpg}}]]
Line 9:		Line 10:
	[[File:TANDY_26-3866.svg\|frameless\|link={{filepath:TANDY_26-3866.svg}}]]		[[File:TANDY_26-3866.svg\|frameless\|link={{filepath:TANDY_26-3866.svg}}]]

	= DIY Modern Replacment		=DIY Modern Replacment=

	https://github.com/bkw777/TANDY_200_RAM		https://github.com/bkw777/TANDY_200_RAM
Line 52:		Line 53:
	-->		-->

	More info		=More info=

			https://archive.org/details/Model_200_Portable_Computer_Service_Manual_19xx_Tandy/page/n75/mode/2up

	http://bitchin100.com/wiki/index.php?title=Tandy_200_RAM		http://bitchin100.com/wiki/index.php?title=Tandy_200_RAM

2022-09-18T00:08:12Z

← Older revision		Revision as of 00:08, 18 September 2022
Line 1:		Line 1:
	The model 200 comes with 24k built in, and supports up to 2 more banks of 24k in the form of ceramic dip modules that plug into the Option RAM #1 & #2 sockets.		The model 200 comes with 24k built in, and supports up to 2 more banks of 24k in the form of ceramic dip modules that plug into the Option RAM #1 & #2 sockets.

			= Original Ceramic Modules
	The original 24K module was Catalog Number 26-3866.		The original 24K module was Catalog Number 26-3866.

Line 8:		Line 9:
	[[File:TANDY_26-3866.svg\|frameless\|link={{filepath:TANDY_26-3866.svg}}]]		[[File:TANDY_26-3866.svg\|frameless\|link={{filepath:TANDY_26-3866.svg}}]]

	Modern ~~replacements:~~		= DIY Modern Replacment

	https://github.com/bkw777/TANDY_200_RAM		https://github.com/bkw777/TANDY_200_RAM

2022-09-17T23:58:29Z

← Older revision		Revision as of 23:58, 17 September 2022
Line 3:		Line 3:
	The original 24K module was Catalog Number 26-3866.		The original 24K module was Catalog Number 26-3866.

	[[File:TANDY_26-3866_top.jpg\|200px]]		[[File:TANDY_26-3866_top.jpg\|200px\|link={{filepath:TANDY_26-3866_top.jpg}}]]
	[[File:TANDY_26-3866_bottom.jpg\|200px]]		[[File:TANDY_26-3866_bottom.jpg\|200px\|link={{filepath:TANDY_26-3866_bottom.jpg}}]]

	[[File:TANDY_26-3866.svg\|frameless\|link={{filepath:TANDY_26-3866.svg}}]]		[[File:TANDY_26-3866.svg\|frameless\|link={{filepath:TANDY_26-3866.svg}}]]

2022-09-17T23:56:31Z

← Older revision		Revision as of 23:56, 17 September 2022
Line 6:		Line 6:
	[[File:TANDY_26-3866_bottom.jpg\|200px]]		[[File:TANDY_26-3866_bottom.jpg\|200px]]

	[[File:TANDY_26-3866.svg\|frameless\|]]		[[File:TANDY_26-3866.svg\|frameless\|link={{filepath:TANDY_26-3866.svg}}]]

	Modern replacements:		Modern replacements:

2022-09-17T23:55:05Z

← Older revision		Revision as of 23:55, 17 September 2022
Line 6:		Line 6:
	[[File:TANDY_26-3866_bottom.jpg\|200px]]		[[File:TANDY_26-3866_bottom.jpg\|200px]]

	[[File:TANDY_26-3866.svg\|frameless\|~~link=images/6/61/TANDY_26-3866.svg~~]]		[[File:TANDY_26-3866.svg\|frameless\|]]

	Modern replacements:		Modern replacements:

2022-09-17T23:54:36Z

← Older revision		Revision as of 23:54, 17 September 2022
Line 6:		Line 6:
	[[File:TANDY_26-3866_bottom.jpg\|200px]]		[[File:TANDY_26-3866_bottom.jpg\|200px]]

	[[File:TANDY_26-3866.svg\|frameless\|]]		[[File:TANDY_26-3866.svg\|frameless\|link=images/6/61/TANDY_26-3866.svg]]

	Modern replacements:		Modern replacements:

2022-09-17T23:53:40Z

2022-09-17T23:46:13Z

← Older revision		Revision as of 23:46, 17 September 2022
Line 3:		Line 3:
	The original 24K module was Catalog Number 26-3866.		The original 24K module was Catalog Number 26-3866.

	~~Here is an open source design for a new compatible module~~. ~~Actually it's a few different varaitions of modules to suit different chips availability, and different user skill at hand soldering~~.		[[File:TANDY_26-3866_top.jpg\|200px]]
			[[File:TANDY_26-3866_bottom.jpg\|200px]]
			[[File:TANDY_26-3866.svg]]

	~~This is new and not yet tested, but the circuit is simple.~~		Modern replacements:

	https://github.com/bkw777/TANDY_200_RAM		https://github.com/bkw777/TANDY_200_RAM