drumat!c wrote:You sure can.....In fact, the TURBO attribute of an SP-12 Turbo is as simple as upgrading its internal memory.
http://www.heretical.com/miscella/baker4.html
Reads like here-say Drumat!c ...
A fact about the Turbo upgrade for those who need reminding, don't know any better or have not read the TURBO UPGRADE install documents.
...and some stories from my bench this weekend.
2 x SP12 TURBO
1 with OS 2.4 ( Loony Tunes World Series 85 Model )
1 with OS 2.6 ( What's his name memorial model )
1 x SP12 STANDARD
With OS 2.5 ( yes ... an OS not listed on the Emulator Archive ).
The TURBO upgrade is a combination of:
RAM ( quite a few old school RAM chips for expanding the SAMPLE and SEQUENCE memory )
ROM ( containing the TURBO OS )
and ...
A custom Programmable Logic Array ( PAL ) chip for decoding the extra RAM added during the TURBO upgrade.
RAM an ROM components are easy to source.
The PAL is security fused and difficult to dump and clone unless you're a skilled hacker.
My suggestion
Purchase a TURBO UPGRADED SP12 and save your self the hassle of trying to source an upgrade.
Rohan.
PS: Both SP12 TURBO machines are now running at version 2.6. One has had just about every Tantalum and Electrolytic capacitor replaced. One has had it's boot screen hacked. All have had their memory batteries changed. One had its AD chip changed. They are all VERY groovy !!!
