Memory upgrades, hard drives and device DMA (St/e alike)

[carmel_andrews]

Metalguy...

 

Do you still have the 1200's mobo that you didn't bastardize

 

It must have taken you an age to socket every xe IC

 

Because of the smaller footprint of the xe mobo i guess that means mucho space for more mods/upgrades

 

Getting back to the 1200 case and mobo, is the mobo almost the same size as the case or much smaller and could you do an internal heavy duty psu for the 1200 (stfm/e alike) if the mobo was smaller, heavy duty to drive lots of mod's/upgrades

[MEtalGuy66]

Metalguy...

Hi Carmel

Do you still have the 1200's mobo that you didn't bastardize

Who said i carmelized any 1200XL motherboards?

It must have taken you an age to socket every xe IC

It takes about 6 hours to completely socket a 130XE, and straighten out all the other minor problems they usually have.. With an industrial grade desoldering station, you could probably do it in 2 hours or less.

Because of the smaller footprint of the xe mobo i guess that means mucho space for more mods/upgrades

Yep, but it also means you have to machine holes into the 1200XL case to accomadate all the differences in port placement. And you also have to convert your 1200XL keyboard PCB to work with the XE which has it's decoders on-board. (or convert the XE to work with the 1200 keyboard.. whichever.) But yeah, when it's done, the 1200XL case absolutely "swallows" the 130xe board, with plenty of room to spare..

Getting back to the 1200 case and mobo, is the mobo almost the same size as the case or much smaller and could you do an internal heavy duty psu for the 1200 (stfm/e alike) if the mobo was smaller, heavy duty to drive lots of mod's/upgrades

 

The 1200 PSU is already pretty heavy duty in alot of respects.. If you want to add ALOT more current capacity, you could add a second 5v regulator.. A 7805 would give you an additional amp of capacity on a second 5v circuit. Ive actually done this before (to power internal drives, etc.) and bolted it to the existing heatsink, drilled holes to solder-mount it on the motherboard, and wired it underneath.. Looked/worked fine. The rectifier bridge they use on the 1200XL motherboard is already overkill and will handle the extra current, no problem. The external transformer is easily good for twice the current a stock 1200XL draws as well...