I picked up this adapter about a month ago and it works great with my Jr Captain. NES adapter sounds really close, I'm surprised I hadn't thought if it. This one's dirt cheap on eBay though, used, but no issues so far (besides I still only have 256k but that's another issue)
Didn't realize there were drivers, I didn't have to install any...
Edit: forgot link! http://r.ebay.com/2y3O7w
Testing Tecmar Jr Captain/cadet
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OldComputerGuy
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- Joined: Sun Dec 04, 2016 6:28 pm
Re: Testing Tecmar Jr Captain/cadet
How does the connector on that adapter fit the Jr Captain? I found a wall wart from a Databyte modem that met all the power requirements but the connector was wrong. I might just get one of these and forget about modding the modem power supply if it fits without being too loose or too tight.synchrite wrote:I picked up this adapter about a month ago and it works great with my Jr Captain. NES adapter sounds really close, I'm surprised I hadn't thought if it. This one's dirt cheap on eBay though, used, but no issues so far (besides I still only have 256k but that's another issue)
Didn't realize there were drivers, I didn't have to install any...
Edit: forgot link! http://r.ebay.com/2y3O7w
Re: Testing Tecmar Jr Captain/cadet
I will need to try the 5volt hack, I got a jrCaptain with 1 of my PCjrs so of course I need to make it work.
I was going to replace the 64k chips with 256k chips in mine but to my surprise when I opened it someone else already had.
Still find it funny the jrCaptain manual tells you to use the cadet add-on to gain more memory but then a few pages farther in it tells you how to remove your 64k chips and replace with 256k chips if you wish.
Edit: I have a long Jr power board so I was thinking maybe I could tap off the 5 volt wires from the floppy drive for this or else I will get an akbkuku made power adapter as I know an atx power supply should have ample 5 volt amperage to do this. I will do more research before I try it.
I was going to replace the 64k chips with 256k chips in mine but to my surprise when I opened it someone else already had.
Still find it funny the jrCaptain manual tells you to use the cadet add-on to gain more memory but then a few pages farther in it tells you how to remove your 64k chips and replace with 256k chips if you wish.
Edit: I have a long Jr power board so I was thinking maybe I could tap off the 5 volt wires from the floppy drive for this or else I will get an akbkuku made power adapter as I know an atx power supply should have ample 5 volt amperage to do this. I will do more research before I try it.
Re: Testing Tecmar Jr Captain/cadet
Actually the Tecmar jrCaptain already has the ram in sockets and a provision to swap a jumper and use 256k chips.. unlike an IBM sidecar.Trixter wrote:Not a bad idea, since you can do a simple hardware mod to a 128K sidecar to allow it to take 4k256 drams, turning it into a 512K sidecar. Warning: This takes a lot of desoldering/resoldering of chips.
https://computerarchive.org/files/compu ... aptain.pdf - page #31
Re: Testing Tecmar Jr Captain/cadet
Does anyone know the differences in JrCaptains?
I ended up finding another one that came with a JrCadet. Both of the JrCaptains are the same part # 22502 (128 KB one) and they both have the same revision board inside 200502 Rev C except one has almost all of its chips on the board socketed and the other one does not. The one that doesnt have its chips socketed has the power adapter hard wired to the board instead of a connector plug, I cant tell if someone else did this or if it was Tecmar. The solder joints dont look the same as the rest of them on the board.
I also find it strange that although the ram chips are not socketed it still has the jumper you use to pick 64k dram or 256k dram chips and the dip switch bank is different as well (well different in appearance).
https://i.imgur.com/HKhgpfC.jpg
I'm guessing the one without socketed chips might be an earlier model?
*edit* After reading the manual one more time (must have read it 5 times already) there is an addendum at the end of it:
So that explains the ram chips not socketed but what about most of the other chips on the board that are socketed on one model but not the other and why are both of the the same part #?
An Ad from back in 1984 said there is 3 part #s :
I guess that must have backtracked on that.
I ended up finding another one that came with a JrCadet. Both of the JrCaptains are the same part # 22502 (128 KB one) and they both have the same revision board inside 200502 Rev C except one has almost all of its chips on the board socketed and the other one does not. The one that doesnt have its chips socketed has the power adapter hard wired to the board instead of a connector plug, I cant tell if someone else did this or if it was Tecmar. The solder joints dont look the same as the rest of them on the board.
I also find it strange that although the ram chips are not socketed it still has the jumper you use to pick 64k dram or 256k dram chips and the dip switch bank is different as well (well different in appearance).
https://i.imgur.com/HKhgpfC.jpg
I'm guessing the one without socketed chips might be an earlier model?
*edit* After reading the manual one more time (must have read it 5 times already) there is an addendum at the end of it:
So that explains the ram chips not socketed but what about most of the other chips on the board that are socketed on one model but not the other and why are both of the the same part #?
An Ad from back in 1984 said there is 3 part #s :
I guess that must have backtracked on that.