TransWarp GS - Revision history

RMHenry: /* Why Different GAL Versions */

2023-05-02T22:30:53Z

Why Different GAL Versions

← Older revision		Revision as of 15:30, 2 May 2023
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	We do not know for sure what the different GAL revisions do besides allow for a reduction in overall ICs used while allowing for simple redesign of the board's function or connections. They also seem to be used for addressing bug fixes.		We do not know for sure what the different GAL revisions do besides allow for a reduction in overall ICs used while allowing for simple redesign of the board's function or connections. They also seem to be used for addressing bug fixes.

	The only GAL currently known about is 2 revision "B", and this was a DMA fix Applied Engineering issued. It is an absolute requirement for the TranWarp GS to work at all with at least some ~~RamFAST~~ SCSI boards (e.g. the revision "C" boards). RamFAST revision "D" does not require the 2B GAL.		The only GAL currently known about is 2 revision "B", and this was a DMA fix Applied Engineering issued. It is an absolute requirement for the TranWarp GS to work at all with at least some [[RamFAST_SCSI\|RAMFast SCSI]] boards (e.g. the revision "C" boards). RamFAST revision "D" does not require the 2B GAL.

	No original GAL source code has been found to date. Without documented source we will never know the reasons for the revisions.		No original GAL source code has been found to date. Without documented source we will never know the reasons for the revisions.


	== What roles the GALs Perform ==		== What roles the GALs Perform ==

RMHenry: /* Upgrading and Overclocking */

2021-06-13T19:59:13Z

Upgrading and Overclocking

← Older revision		Revision as of 12:59, 13 June 2021
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	'''Upgrade - Step 2: Replace GAL1 and reprogram remaining GALs with current code.'''		'''Upgrade - Step 2: Replace GAL1 and reprogram remaining GALs with current code.'''
	<br>		<br>
	In the past "GAL Upgrade Kits" were sold with all eight ICs. After the retesting with the [https://wiki.reactivemicro.com/Universal_PSU_Kit Universal PSU Kit] it was confirmed that ONLY GAL1, and possibly GAL2 need replacing. The rest of the GALs seem fine at 16MHz speed or more. GAL1 is usually replaced with 7ns or 10ns IC. GAL2 needs to be 15ns, which the original unit usually is. The rest of the GALs can be reprogrammed as needed with the current code. Some issues have been reported if they GALs are not reprogrammed. However there have also been reports that the GALs don't need to be reprogrammed and work fine.		In the past "GAL Upgrade Kits" were sold with all eight ICs. After the retesting with the [https://wiki.reactivemicro.com/Universal_PSU_Kit Universal PSU Kit] it was confirmed that ONLY GAL1, and possibly GAL2 need replacing. The rest of the GALs seem fine at 16MHz speed or more. GAL1 is usually replaced with 7ns or 10ns IC. GAL2 needs to be 15ns, which the original unit usually is. The rest of the GALs can be reprogrammed as needed with the current code. Some issues have been reported if they GALs are not reprogrammed. However there have also been reports that the GALs don't need to be reprogrammed and work fine.<br>
	GAL3-5 should be 25ns. GAL6-7 should be 25ns or faster. GAL8 needs to be 15ns or better. However GAL3 does need to be Rev "E", and if testing issues then best to change it from 25ns to 15ns and retest to see if it's related.		GAL3-5 should be 25ns. GAL6-7 should be 25ns or faster. GAL8 needs to be 15ns or better. However GAL3 does need to be Rev "E", and if testing issues then best to change it from 25ns to 15ns and retest to see if it's related.<br>

	<gallery class="center" widths=200px heights=180px>		<gallery class="center" widths=200px heights=180px>

RMHenry: /* Upgrading and Overclocking */

2021-06-13T19:58:50Z

Upgrading and Overclocking

← Older revision		Revision as of 12:58, 13 June 2021
Line 103:		Line 103:
	'''Upgrade - Step 2: Replace GAL1 and reprogram remaining GALs with current code.'''		'''Upgrade - Step 2: Replace GAL1 and reprogram remaining GALs with current code.'''
	<br>		<br>
	In the past "GAL Upgrade Kits" were sold with all eight ICs. After the retesting with the [https://wiki.reactivemicro.com/Universal_PSU_Kit Universal PSU Kit] it was confirmed that ONLY GAL1, and possibly GAL2 need replacing. The rest of the GALs seem fine at 16MHz speed or more. GAL1 is usually replaced with 7ns or 10ns IC. GAL2 needs to be 15ns, which the original unit usually is. The rest of the GALs can be reprogrammed as needed with the current code. Some issues have been reported if they GALs are not reprogrammed. However there have also been reports that the GALs don't need to be reprogrammed and work fine.		In the past "GAL Upgrade Kits" were sold with all eight ICs. After the retesting with the [https://wiki.reactivemicro.com/Universal_PSU_Kit Universal PSU Kit] it was confirmed that ONLY GAL1, and possibly GAL2 need replacing. The rest of the GALs seem fine at 16MHz speed or more. GAL1 is usually replaced with 7ns or 10ns IC. GAL2 needs to be 15ns, which the original unit usually is. The rest of the GALs can be reprogrammed as needed with the current code. Some issues have been reported if they GALs are not reprogrammed. However there have also been reports that the GALs don't need to be reprogrammed and work fine.
	GAL3-5 should be 25ns. GAL6-7 should be 25ns or faster. GAL8 needs to be 15ns or better.		GAL3-5 should be 25ns. GAL6-7 should be 25ns or faster. GAL8 needs to be 15ns or better. However GAL3 does need to be Rev "E", and if testing issues then best to change it from 25ns to 15ns and retest to see if it's related.

	<gallery class="center" widths=200px heights=180px>		<gallery class="center" widths=200px heights=180px>

RMHenry: /* GAL Upgrades */

2020-12-20T06:08:58Z

GAL Upgrades

← Older revision		Revision as of 23:08, 19 December 2020
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	* GAL2B, 10ns speed grade (PN: GAL16V8D-10LP), 7ns speed grade mostly used.		* GAL2B, 10ns speed grade (PN: GAL16V8D-10LP), 7ns speed grade mostly used.

	* GAL3x, 25ns speed grade (PN: GAL20V8B-25LP). Note: Some early ~~(1989)~~ 25ns GALs ~~don~~'t work. Best practice to use 15ns part.		* GAL3x, 25ns speed grade (PN: GAL20V8B-25LP). Note: Some early 25ns GALs won't work. Best practice to use 15ns part.
	* GAL4x, 25ns speed grade (PN: GAL20V8B-25LP).		* GAL4x, 25ns speed grade (PN: GAL20V8B-25LP).
	* GAL5x, 25ns speed grade (PN: GAL20V8B-25LP).		* GAL5x, 25ns speed grade (PN: GAL20V8B-25LP).

RMHenry: /* GAL Upgrades */

2020-12-20T06:07:50Z

GAL Upgrades

← Older revision		Revision as of 23:07, 19 December 2020
Line 296:		Line 296:
	* GAL2B, 10ns speed grade (PN: GAL16V8D-10LP), 7ns speed grade mostly used.		* GAL2B, 10ns speed grade (PN: GAL16V8D-10LP), 7ns speed grade mostly used.

	* GAL3x, 25ns speed grade (PN: GAL20V8B-25LP).		* GAL3x, 25ns speed grade (PN: GAL20V8B-25LP). Note: Some early (1989) 25ns GALs don't work. Best practice to use 15ns part.
	* GAL4x, 25ns speed grade (PN: GAL20V8B-25LP).		* GAL4x, 25ns speed grade (PN: GAL20V8B-25LP).
	* GAL5x, 25ns speed grade (PN: GAL20V8B-25LP).		* GAL5x, 25ns speed grade (PN: GAL20V8B-25LP).
Line 321:		Line 321:

	In the past "GAL Upgrade Kits" were sold with all eight ICs. After the retesting with the [https://wiki.reactivemicro.com/Universal_PSU_Kit Universal PSU Kit] it was confirmed that ONLY GAL1 and GAL2 need replacing. The rest of the GALs seem fine at 16MHz speed or more. Before the Universal PSU Kit the GAL performance and consistency was not good and the newer GAL ICs seem to put up with the older PSUs and their issues much better than the original GAL ICs.		In the past "GAL Upgrade Kits" were sold with all eight ICs. After the retesting with the [https://wiki.reactivemicro.com/Universal_PSU_Kit Universal PSU Kit] it was confirmed that ONLY GAL1 and GAL2 need replacing. The rest of the GALs seem fine at 16MHz speed or more. Before the Universal PSU Kit the GAL performance and consistency was not good and the newer GAL ICs seem to put up with the older PSUs and their issues much better than the original GAL ICs.


	== Downloadable Files ==		== Downloadable Files ==

Khaibitgfx at 22:08, 24 October 2020

2020-10-24T22:08:17Z

← Older revision		Revision as of 15:08, 24 October 2020
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	[[Image:Title_TransWarp_GS_Accelerator.svg\|~~440px~~\|link=https://wiki.reactivemicro.com/images/b/b9/Title_TransWarp_GS_Accelerator.svg]]		[[Image:Title_TransWarp_GS_Accelerator.svg\|700px\|link=https://wiki.reactivemicro.com/images/b/b9/Title_TransWarp_GS_Accelerator.svg]]

Khaibitgfx at 21:50, 17 October 2020

2020-10-17T21:50:59Z

← Older revision		Revision as of 14:50, 17 October 2020
Line 1:		Line 1:
	[[Image:Title_TransWarp_GS_Accelerator.svg\|~~340px~~\|link=https://wiki.reactivemicro.com/images/b/b9/Title_TransWarp_GS_Accelerator.svg]]		[[Image:Title_TransWarp_GS_Accelerator.svg\|440px\|link=https://wiki.reactivemicro.com/images/b/b9/Title_TransWarp_GS_Accelerator.svg]]

Khaibitgfx: /* Installation */

2020-08-29T23:00:27Z

Installation

← Older revision		Revision as of 16:00, 29 August 2020
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	File:Photo6-original-wiki-tiny.png\|Step 6		File:Photo6-original-wiki-tiny.png\|Step 6
	</gallery>		</gallery>

Khaibitgfx: /* Installation */

2020-08-29T22:59:31Z

Installation

← Older revision		Revision as of 15:59, 29 August 2020
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	'''NOTE: From 16MHz and up a fan for active cooling is recommended for the GALs.~~'''~~<br>		'''NOTE:''' From 16MHz and up a fan for active cooling is recommended for the GALs.<br>
	'''Only red and black wires are used on the connector from the fan. Disregard the other wires and colors (if any).'''		'''Only red and black wires are used on the connector from the fan. Disregard the other wires and colors (if any).'''

Khaibitgfx: /* Installation */

2020-08-29T22:59:09Z

Installation

← Older revision		Revision as of 15:59, 29 August 2020
Line 34:		Line 34:


	'''NOTE: From 16MHz and up a fan for active cooling is recommended for the GALs.'''		'''NOTE: From 16MHz and up a fan for active cooling is recommended for the GALs.'''<br>
	'''Only red and black wires are used on the connector from the fan. Disregard the other wires and colors (if any).'''		'''Only red and black wires are used on the connector from the fan. Disregard the other wires and colors (if any).'''