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Re: Any reason I'd want another memory expansion card?
Posted: Sat Oct 06, 2018 11:07 am
by Gremlin5
Franko wrote:
Chuckphd53 wrote:I upgraded an IBM addon by upgrading the chips, they were soldered in and it took about three hours...
No reason to rush, and make sure you have the right tools, good side cutters to rmove the original chips with out damaging the PCBoard.... If you decide to give it a go, let me know and I can offer some insight.
And I was wishfully hoping the chips were socketed. Ah well -- I might give that a go a little down the road.
I got a Tecmar JrCaptain just because it had socketed ram chips thinking I would put 256k chips in it and when I got it I found out it already had the 256k chips in it.
Now I just need to mod it to get power to it. I figured doing a power mod was easier than desoldering a bunch of chips if I got a IBM memory sidecar.... guess I will find out.
Re: Any reason I'd want another memory expansion card?
Posted: Sat Oct 06, 2018 11:21 am
by Brutman
I honestly wouldn't mess with any of the memory sidecars anymore ...
Get a jrIDE. Memory to 736KB with no DRAM refresh cycles interfering with performance, IDE interface, clock/calendar, and goodies we haven't really unlocked yet ... Save the parallel ports because you need those for Zip drives, Xircom adapters, etc.
However, don't trash the memory sidecars. They are fairly easy to upgrade to 512KB ... especially the IBM and Microsoft ones.
Re: Any reason I'd want another memory expansion card?
Posted: Sat Oct 06, 2018 6:18 pm
by Franko
Brutman wrote:Get a jrIDE.
Definitely. I contacted alanh, and am hopeful they'll be available at some point.
Re: Any reason I'd want another memory expansion card?
Posted: Sun Oct 07, 2018 4:26 pm
by alanh
I ordered parts this weekend. I'll send out an email to the waiting list next weekend when I get them built-up.
Re: Any reason I'd want another memory expansion card?
Posted: Sun Oct 07, 2018 4:36 pm
by Gremlin5
alanh wrote:I ordered parts this weekend. I'll send out an email to the waiting list next weekend when I get them built-up.
I would like one but I'm afraid I have over spent my budget on pcjr, don't know if I can justify more.
Re: Any reason I'd want another memory expansion card?
Posted: Sun Oct 07, 2018 5:22 pm
by KenG
I would like one but I'm afraid I have over spent my budget on pcjr, don't know if I can justify more.
Of all the things I bought for my jr, getting the jr-IDE and a 1MB DOM was the best. Second would probably be the CGA to VGA setup to use an LCD monitor. So, if at all possible you should get in on this run.
Re: Any reason I'd want another memory expansion card?
Posted: Sun Oct 07, 2018 5:54 pm
by Franko
alanh wrote:I ordered parts this weekend. I'll send out an email to the waiting list next weekend when I get them built-up.
Great news!
Re: Any reason I'd want another memory expansion card?
Posted: Sat Apr 06, 2019 5:19 am
by OldComputerGuy
Just don't forget that if you have too many sidecars attached it will stress the power supply and you will need a power sidecar.