Post Reply 
Benchmarks 71B versus 48GX
06-17-2020, 12:36 PM
Post: #19
RE: Benchmarks 71B versus 48GX
(06-17-2020 11:43 AM)KimH Wrote:  In later years - i think mid 86, they started to mount the 1LK7 on the PCB.

There is no way - that I know - to see the actual CPU version without opening the Case.

If it's really a 1LK7 then it's the same than used in the 28C and it supports the PC=(A) opcode. It may be a way to detect the CPU version by software. I may try.

Quote:If it is 1LK7, the LC circuit can be modified to run at about 1MHz - at about 1.1MHz the CPU starts to become unreliable.

If it starts to fail at about 1.1MHz, I would not push it to about 1MHz :-)

J-F
Visit this user's website Find all posts by this user
Quote this message in a reply
Post Reply 


Messages In This Thread
RE: Benchmarks 71B versus 48GX - RMollov - 06-22-2020, 04:48 AM
RE: Benchmarks 71B versus 48GX - KimH - 06-17-2020, 11:43 AM
RE: Benchmarks 71B versus 48GX - KimH - 06-17-2020, 12:25 PM
RE: Benchmarks 71B versus 48GX - J-F Garnier - 06-17-2020 12:36 PM
RE: Benchmarks 71B versus 48GX - KimH - 06-17-2020, 02:12 PM
RE: Benchmarks 71B versus 48GX - KimH - 06-18-2020, 06:09 AM
RE: Benchmarks 71B versus 48GX - KimH - 06-18-2020, 07:08 AM
RE: Benchmarks 71B versus 48GX - HP67 - 05-05-2014, 01:42 PM
RE: Benchmarks 71B versus 48GX - rprosperi - 06-17-2020, 10:23 PM
RE: Benchmarks 71B versus 48GX - KimH - 06-19-2020, 04:40 PM



User(s) browsing this thread: 1 Guest(s)