QUAD - Revision history

Bkw at 00:32, 25 January 2019

2019-01-25T00:32:22Z

← Older revision		Revision as of 00:32, 25 January 2019
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	:http://www.ebay.com/itm/5pcs-Gold-Round-40pin-Male-single-row-0-1inch-2-54mm-pitch-PCB-Panel-Pin-Header-/253102362072		:http://www.ebay.com/itm/5pcs-Gold-Round-40pin-Male-single-row-0-1inch-2-54mm-pitch-PCB-Panel-Pin-Header-/253102362072
	:Note also the ebay ones all come from China and will take more than a week to arrive.		:Note also the ebay ones all come from China and will take more than a week to arrive.

			==Saved Files==
			https://drive.google.com/open?id=1ZGjdFMtF-tlTeWjJtHPHN74D5e0A_8_7

Bkw: /* Build Your Own */

2017-09-11T00:31:06Z

Build Your Own

← Older revision		Revision as of 00:31, 11 September 2017
Line 22:		Line 22:
	[https://www.oshpark.com/shared_projects/pStseujD Order PCB]		[https://www.oshpark.com/shared_projects/pStseujD Order PCB]

	[http://www.digikey.com/short/~~qcm427n~~ Order Parts]		[http://www.digikey.com/short/qcm427 Order Parts]

	:NOTE: The DigiKey cart above includes the pins just for reference and completeness.		:NOTE: The DigiKey cart above includes the pins just for reference and completeness.

Bkw: /* Build Your Own */

2017-09-11T00:23:08Z

Build Your Own

← Older revision		Revision as of 00:23, 11 September 2017
Line 25:		Line 25:

	:NOTE: The DigiKey cart above includes the pins just for reference and completeness.		:NOTE: The DigiKey cart above includes the pins just for reference and completeness.
	:I would actually remove the pins from the cart and get them from ebay instead.		:I would actually remove the pins from the cart and get them from ebay instead. (Search: "round pins gold 2.54")
	:~~Typical example. You only need~~ 2 40-pin sticks to build all 3 QUADs:		:2 40-pin sticks is enough to build all 3 QUADs. Typical example:
	:http://www.ebay.com/itm/5pcs-Gold-Round-40pin-Male-single-row-0-1inch-2-54mm-pitch-PCB-Panel-Pin-Header-/253102362072		:http://www.ebay.com/itm/5pcs-Gold-Round-40pin-Male-single-row-0-1inch-2-54mm-pitch-PCB-Panel-Pin-Header-/253102362072
	:Note also the ebay ones all come from China and will take more than a week to arrive.		:Note also the ebay ones all come from China and will take more than a week to arrive.

Bkw: /* Build Your Own */

2017-09-11T00:21:11Z

Build Your Own

← Older revision		Revision as of 00:21, 11 September 2017
Line 24:		Line 24:
	[http://www.digikey.com/short/qcm427n Order Parts]		[http://www.digikey.com/short/qcm427n Order Parts]

	NOTE: The DigiKey cart above ~~include~~ the pins for completeness~~, but IMO the price of the pins from DigiKey is a bit crazy there~~. I would actually remove the pins from the cart ~~before submitting the order,~~ and ~~then use~~ ebay ~~to search "round pins gold 2~~.~~54" and buy any of those~~. ~~They come in~~ 40-pin ~~sticks, and you only need 26 pins per QUAD, so you only need as few as 2~~ sticks to build 3 QUADs.		:NOTE: The DigiKey cart above includes the pins just for reference and completeness.
			:I would actually remove the pins from the cart and get them from ebay instead.
	~~Typical example~~:		:Typical example. You only need 2 40-pin sticks to build all 3 QUADs:
	:http://www.ebay.com/itm/5pcs-Gold-Round-40pin-Male-single-row-0-1inch-2-54mm-pitch-PCB-Panel-Pin-Header-/253102362072		:http://www.ebay.com/itm/5pcs-Gold-Round-40pin-Male-single-row-0-1inch-2-54mm-pitch-PCB-Panel-Pin-Header-/253102362072
	~~That's 3 sticks of 40 pins for $3 plus $2 shipping, while The digikey pins cost~~ more ~~just for the pins~~ than ~~for all the other parts combined, including the flash memory!~~		:Note also the ebay ones all come from China and will take more than a week to arrive.

Bkw at 00:14, 11 September 2017

2017-09-11T00:14:47Z

@@ Line 1: / Line 1: @@
 [http://bitchin100.com/wiki/index.php?title=QUAD QUAD on Bitchin100]
-[https://www.oshpark.com/shared_projects/pStseujD QUAD on OSH Park]
+QUAD (at least the functionality) is modeled after the [[PGDesigns|PG Designs]] ram bank boards.
 They both provide multiple banks main ram, which you can switch between using a special menu program that overlays the built in main rom menu. QUAD's "0quad" is modeled after PG Designs "0menu"
@@ Line 17: / Line 16: @@
 PG Designs boards use a button battery right on the ram board to maintain the memory. Quad uses the computer's internal memory battery. There are advantages and disadvantages to both approaches. The PG Designs board can be pulled out of the M100 and put into another, and the memory will still be preserved on it. The QUAD will lose it's memory if you unplug it. However, the button cell on the PG Designs must be replaced periodically. The QUAD has no consumable parts to maintain.

Bkw at 08:11, 4 September 2017

2017-09-04T08:11:26Z

← Older revision		Revision as of 08:11, 4 September 2017
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	QUAD is one size, 4 banks.		QUAD is one size, 4 banks.

	PG Designs boards added banks to the built-in. The original built-in 8k-32k remains active and accessible as the main "Bank 0" when the PG Designs board is added.		PG Designs boards added banks to the built-in. The original built-in 8k-32k remains active and accessible as the main "Bank 1" when the PG Designs board is added.

	QUAD displaces the built-in ram. So when you install a QUAD, the built-in ram becomes hidden and inaccessible, and the QUAD itself provides the ram for all 4 available banks. (This could be an advantage. If the built-in ram has bad addresses or bad chips, or if there is only 8, 16, or 24k built-in instead of the full 32k, the QUAD will give you full 32k in bank 0 as well as 1-3)		QUAD displaces the built-in ram. So when you install a QUAD, the built-in ram becomes hidden and inaccessible, and the QUAD itself provides the ram for all 4 available banks. (This could be an advantage. If the built-in ram has bad addresses or bad chips, or if there is only 8, 16, or 24k built-in instead of the full 32k, the QUAD will give you full 32k in bank 1 as well as 2-4)

	PG Designs boards use a button battery right on the ram board to maintain the memory. Quad uses the computer's internal memory battery. There are advantages and disadvantages to both approaches. The PG Designs board can be pulled out of the M100 and put into another, and the memory will still be preserved on it. The QUAD will lose it's memory if you unplug it. However, the button cell on the PG Designs must be replaced periodically. The QUAD has no consumable parts to maintain.		PG Designs boards use a button battery right on the ram board to maintain the memory. Quad uses the computer's internal memory battery. There are advantages and disadvantages to both approaches. The PG Designs board can be pulled out of the M100 and put into another, and the memory will still be preserved on it. The QUAD will lose it's memory if you unplug it. However, the button cell on the PG Designs must be replaced periodically. The QUAD has no consumable parts to maintain.

Bkw at 08:09, 4 September 2017

2017-09-04T08:09:17Z

← Older revision		Revision as of 08:09, 4 September 2017
Line 3:		Line 3:
	[https://www.oshpark.com/shared_projects/pStseujD QUAD on OSH Park]		[https://www.oshpark.com/shared_projects/pStseujD QUAD on OSH Park]

	QUAD (at least the functionality) is modeled heavily after the [[~~PG_Designs~~\|PG Designs]] ram bank boards.		QUAD (at least the functionality) is modeled heavily after the [[PGDesigns\|PG Designs]] ram bank boards.

	They both provide multiple banks main ram, which you can switch between using a special menu program that overlays the built in main rom menu. QUAD's "0quad" is modeled after PG Designs "0menu"		They both provide multiple banks main ram, which you can switch between using a special menu program that overlays the built in main rom menu. QUAD's "0quad" is modeled after PG Designs "0menu"

Bkw: Created page with "[http://bitchin100.com/wiki/index.php?title=QUAD QUAD on Bitchin100] [https://www.oshpark.com/shared_projects/pStseujD QUAD on OSH Park] QUAD (at least the functionality) is..."

2017-09-04T08:08:41Z

Created page with "[http://bitchin100.com/wiki/index.php?title=QUAD QUAD on Bitchin100] [https://www.oshpark.com/shared_projects/pStseujD QUAD on OSH Park] QUAD (at least the functionality) is..."

New page

[http://bitchin100.com/wiki/index.php?title=QUAD QUAD on Bitchin100]

[https://www.oshpark.com/shared_projects/pStseujD QUAD on OSH Park]

QUAD (at least the functionality) is modeled heavily after the [[PG_Designs|PG Designs]] ram bank boards.

They both provide multiple banks main ram, which you can switch between using a special menu program that overlays the built in main rom menu. QUAD's "0quad" is modeled after PG Designs "0menu"

Differences are:
PG Designs came in several sizes from a single extra 32k up to 7 additional 32k banks added to the built-in.

QUAD is one size, 4 banks.

PG Designs boards added banks to the built-in. The original built-in 8k-32k remains active and accessible as the main "Bank 0" when the PG Designs board is added.

QUAD displaces the built-in ram. So when you install a QUAD, the built-in ram becomes hidden and inaccessible, and the QUAD itself provides the ram for all 4 available banks. (This could be an advantage. If the built-in ram has bad addresses or bad chips, or if there is only 8, 16, or 24k built-in instead of the full 32k, the QUAD will give you full 32k in bank 0 as well as 1-3)

PG Designs boards use a button battery right on the ram board to maintain the memory. Quad uses the computer's internal memory battery. There are advantages and disadvantages to both approaches. The PG Designs board can be pulled out of the M100 and put into another, and the memory will still be preserved on it. The QUAD will lose it's memory if you unplug it. However, the button cell on the PG Designs must be replaced periodically. The QUAD has no consumable parts to maintain.