Follow up on this-
I found that my hardware scroll patch conflicts with TS-DOS! TS-DOS uses
HahasiH too, so I will need to move to a non conflicting hidey-hole.
I don't think I wrote this up at Bitchin100 - I will do so, and post the
fixed code.
I am working on rolling this patch out on my M100s
I think that means the old 27C256 in the T102 is a bad idea, without an
adapter board or a wire to +5V.
On Thu, Mar 10, 2022 at 9:52 PM Brian White wrote:
> I always tie it to vcc, with a pullup so that a programmer can still
> override it.
>
> As you saw yourself, every datasheet always says
I always tie it to vcc, with a pullup so that a programmer can still
override it.
As you saw yourself, every datasheet always says to pin to vcc or lower,
usually preferring vcc.
I think the harm is just the risk of reaching vpp randomly if left
flapping, so you might corrupt the data. Probably
Thanks Mike,
I did find one datasheet that said "don't care" but others that specify
5V. Good advice, thanks-
On Thu, Mar 10, 2022 at 3:32 PM Mike Stein wrote:
> Don't know about the 27C256 but experience with 2732s was that with some
> manufacturers you could get away with leaving it to
Don't know about the 27C256 but experience with 2732s was that with some
manufacturers you could get away with leaving it to float whereas on others
you had to explicitly pull it high (which would be my recommendation).
m
On Thu, Mar 10, 2022 at 2:20 PM Stephen Adolph wrote:
> Quick one for
Quick one for the crowd.
On a 27C256, I have always thought you could ignore Vpp for normal use, and
only use it for programming.
So, you could plug a 27C256 where the main rom lives in a T102 or T200, or
UK M100, or KC-85, or M10. whew.
However, when I look at datasheets for 27C256, they all
