Page updated 13.7.2010
AmigaKit Amiga DF0: Terminator





WHERE TO BUY
http://amigakit.leamancomputing.com/

PRIMARY USAGE
When connected toAmiga motherboard FLOPPY port the terminator will supress the floppy interface to permit quicker booting from other drives when a DF0: drive is not available.

SECONDARY USAGE
When you are diagnosing, repairing or just testing Amiga motherboards, you sometimes may want to do it without DF0: connected. For example if you just want to test if Amiga motheboard powers on, you don't really need to have DF0: connected, but even if you remove DF0:, still Amiga would consume some seconds when seeking DF0: in boot. Plugging this terminator to Amiga motherboard FLOPPY connector reduces DF0: seeking time and results faster boot.

PARTS
PCB named Amiga DF0: Terminator, 34 pin female PCB connector and a general purpose diode.

INSTALLATION
Pin 1 is marked in PCB with copper based number 1, but it right between pins 1 and 2, why not position the number 1 closer to actual pin 1 when there plenty of space. The product came without any instructions, but because of pin 1 beeing marked they would be pretty useless. However PCB is made too wide to fit A4000 when either IDE cable or A4000 IDE terminator are connected. In other Amiga models DF0: is located pretty much alone with lots of space around, so for them this terminator fits just fine. In fact this product would not need PCB at all to work, since the diode could be soldered straight to the pins of 40 pin female connectors, but of course with PCB it is easier to disconnect it from Amiga FLOPPY connector just because it is easier to lift the terminator from both ends of the PCB. So to keep the PCB and make this adapter to fit A4000 in any situation, I would move PCB edge and the diode to the otherside of the connector both now beeing closer to A4000 motheboard rear where there are no high components nearby.

MODIFYING FOR A4000 + A4000 IDE terminator USAGE
By using a file, I took of about 1mm from the PCB edge. Now both terminators fit same time, but their PCB edges are still touching each other. IDE cable connector however is more wide from A4000 rear side, so fitting DF0: terminator same time with IDE cable is really cramped combination.

TESTS
Booting A4000cr Rev D with FLOPPY drives and Amiga DF0: Terminator connected
3,57 seconds
Booting A4000cr Rev D with Amiga DF0: Terminator connected, but without FLOPPY drives connected
33,35 seconds
Booting A4000cr Rev D without FLOPPY, IDE or SCSI drives or any terminators connected
37,90 seconds

PRODUCT CONCLUSION
Useful little product that may have been designed more carefully without more manufacturing expences. Still I can recommend it to any Amiga owner exluding A4000 owners.

***** Five stars for the idea
** Three stats for the design
**** Four starts for the price

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AmigaKit A4000 IDE terminator



WHERE TO BUY
http://amigakit.leamancomputing.com/

PRIMARY USAGE
When connected to A4000 motherboard IDE port the terminator will supress the IDE interface to permit quicker booting from SCSI drives or other IDE interfaces located on Zorro cards such as Buddha IDE or FastATA.

SECONDARY USAGE
When you are diagnosing, repairing or just testing A4000 motherboards, you sometimes may want to do it without IDE drives connected. For example if you just want to test if A4000 motheboard powers on, you don't really need to have IDE drives connected, but even if you remove all IDE cables, still A4000 would consume some seconds when seeking IDE drives in boot. Plugging this terminator to A4000 IDE port reduces IDE drives seeking time and results faster boot.

PARTS
PCB named A4000 IDE terminator (c) AmigaKit, 40 pin female PCB connector and 6 pin resistor network.

INSTALLATION
Pin 1 is not marked in PCB and the product came without any instructions, so I needed to ask from AmigaKit how to connect this to A4000 IDE port. Their answer was that the resistor network marks pin 1. Well I can accept that as a memory rule to remember on what end is pin 1, but I cannot accept using a component to show pin 1 and if you look inside opened A4000 case from front side and this is plugged to pin 1 the PCB texts are all upside down what is very misleading when somebody whould wonder how to plug this terminator. Normally in PCB design components pin 1 should be marked as a square shaped pad when other pads are circles. Also using PCB copper or white silk screen to print number 1 is a sign of customer friendly design. To correct this imperfection I used black marker pen to mark pins 1 and pin 40, just to make sure possible next owener of this terminator will not plug it wrong way. When plugged correctly the PCB edge is pointing to the A4000 case front side and there is enough room for it. 34 pin female connector will leave 1,5mm gap between the female and the male connector, but it will give good enough contact even though the terminator cannot be pushed to touch IDE port plastics. Also it bothers me that the word "terminator" in PCB is not written with a capital T, because it is a product name and the other same brand product called "Amiga DF0: Terminator" is also written with a captial T.

AMIGA IDE SIGNALS INVOLVED
3 DD7 Data 7
5 DD6 Data 6
39 /Active Led driver

TESTS
Booting A4000cr Rev D with FLOPPY drives and A4000 IDE terminator connected
3,57 seconds
Booting A4000cr Rev D with A4000 IDE terminator connected, but without FLOPPY drives connected
8,13 seconds
Booting A4000cr Rev D without FLOPPY, IDE or SCSI drives or any terminators connected
37,90 seconds

PRODUCT CONCLUSION
Useful little product that may have been designed more carefully without more manufacturing expences. Still I can recommend it to any A4000 owner.

***** Five stars for the idea
*** Three stats for the design
**** Four starts for the price

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TESTING BOTH PRODUCTS SAME TIME

A4000 IMPROPER FIT


A4000 MODIFIED BUT NOT PERFECT FIT
(picture coming soon)

TEST
Booting A4000cr Rev D with A4000 IDE terminator and Amiga DF0: Terminator connected simultaneously 3,53s

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