help needed getting 8mb 030 working

[terexuk]

hi all,
As mentioned in a previous thread i have a A1200 MTec T1230/28 RTC Accelerator Card 8MB RAM which would,nt work with classicwb this has now been resolved by setting the jumpers to use 4mb only (same sim).
However i would like to be able too use the full 8mb ,when set to 8mb it crashes when loading fblit, with this edited out it crashes at caprefs.
Has anyone any experience of getting this card working with 8mb?

[fitzsteve]

Hi, as you know mine was working with the full 8mb with the jumpers set as per my pic.

Maybe you have a faulty simm?

[terexuk]

hi
ive ran some memory tests which have came back ok , but it would,nt hurt trying a differrent one. ill put an ad in marketplace, time to get wallet out again

regards terexuk

[orange]

i think that card isn't pcmcia friendly. is the slot empty?

[terexuk]

yes its empty, but as fitzsteve said he has had it working at 8mb

[orange]

I have no problems using it with 8Mb either but on wb3.0.
btw, iirc, you could use the same RAM module for 4 or 8Mb just by changing the jumper.

I'd test it with some memcheck util.

[terexuk]

Originally Posted by orange

I have no problems using it with 8Mb either but on wb3.0.
btw, iirc, you could use the same RAM module for 4 or 8Mb just by changing the jumper.

I'd test it with some memcheck util.

yes thats what i have done ,changed the jumper too use 4mb only ,when i change it to 8mb it crashes

[Loedown]

Simm could be faulty as stated or the logic bus drivers for the upper memory addressing could be FUBAR.

If the simm is ok check the 74LS245 or whatever the address bus line driver IC is for the upper address bits

[terexuk]

If the simm is ok check the 74LS245 or whatever the address bus line driver IC is for the upper address bits[/quote]

How and what with ?

[Loedown]

If you're anywhere near Zetr0, it may be worthwhile taking it to him if he has the time.

[terexuk]

just had the simm out for a look and it appears after a bit of googling that it is a 16mb simm which is making me think it is this that is the problem ?

numbers on simm are
s.m.d
tm51c7400 aj-6
9626twn oem

if anybody could confirm ?

[Retro-Nerd]

Has anyone any experience of getting this card working with 8mb?

I have this card too, it works fine with 8MB. But then the PCMCIA port is only activated if you have a KS 3.0 machine, KS 3.1+8MB ram = the PCMCIA port doesn't work anymore.

[rkauer]

Originally Posted by terexuk

just had the simm out for a look and it appears after a bit of googling that it is a 16mb simm which is making me think it is this that is the problem ?

Yes, that's the problem.

Both 4 & 16Mb SIMM are arranged as single sided SIMM (even if it have RAM chips on both sides).

Grab a proper 8Mb stick to cure the problem.

[terexuk]

Originally Posted by rkauer

Yes, that's the problem.

Both 4 & 16Mb SIMM are arranged as single sided SIMM (even if it have RAM chips on both sides).

Grab a proper 8Mb stick to cure the problem.

yes spot on !! new simm arrived today ,just put it in and booted up first time all 8mb of it, with no crashing, one happy bunny !!

thanks to everyone as usual for there help and suggestions

[fitzsteve]

Great stuff