TRS-80 Model 12 versus 16B

Peter Cetinski pete at
Tue Apr 25 21:56:32 CDT 2017

> On Apr 25, 2017, at 10:52 PM, Jim Brain <brain at> wrote:
> So, the 16B has the KB conn on the machine, but the KB?
> And, the 16B has the Z80 motherboard, witht eh 68K in the cage?

16B keyboard is the same as the 12.  Cord is on the KB with a male connector.  Female is on the machine.
16B has the same main board as the 12 with 68K in the cage.  Notice I use "main board" as technically the cage board was referred to as the motherboard in these machines.

>> The 6000 released in 1985 was a slightly enhanced 16B with the biggest difference being the upgrade to an 8Mhz MC68000.  This system allowed you to run XENIX 3.x and address up to 1MB of RAM.
> I thought the 16B could also do 1MB of RAM?

16B was factory maxed at 768k but I’m pretty sure 1MB is fine.

> Can the 6000 still run the Z80 Oses (like TRSDOS II and such)?  (I assume so, since you noted that all units of this entire line used a Z80 for IO)

Yes, the 6000 can run all previous software.

> Jim

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