4 Dec
2024
4 Dec
'24
11:06 a.m.
On 2024-12-04 13:49, Mike Katz via cctalk wrote:
Tony,
I still say the 6809 was the best 8 bit micro ever.
Though I don't have any 6809 systems here I still have my 6809/6809E
Microprocessor Programming Manual from 1981.
Lately I do more with my PDP-8's then anything recent like the 6809🙂
On 12/4/2024 12:30 PM, Tony Duell wrote:
I agree. The user stack pointer was a killer feature. Our repeater
controller controlled, in real time, a 16 x 16 crosspoint matrix
connecting audio and keying from receivers to transmitters, timeout
timers for all RF gear individually, DTMF decode, and separate morse
callsign generation for each transmitter. It could decode on one
channel while it was executing a DTMF command on another. We originally
tried to do his with a 6800 but we needed one more 16-bit register to
achieve real time and the morse sounded like it was being sent by a
duink sailor with his left foot.!
I heard they only discontinued it because the factory burned down, and
never came up with its replacement.
cheers,
Nigel
--
Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU
Amateur Radio, the origin of the open-source concept!
Skype: TILBURY2591
On Wed, Dec 4, 2024 at 6:24 PM Mike Katz
<bitwiz(a)12bitsbest.com> wrote:
Tony,
Thank you for the education. I did some minimal programming of the
6847
on the CoCo and nothing really on the 6845.
A majority of the 6809 programming that I did was for Gimix, when I
worked there in the early 1980's.
And then on embedded 6809 based system, also in the early 1980's.
In the second half of the 1980s I did a few embedded 6809 projects, my
final year project at university and then some designs a for a company
I did a summer job for. I developped all the code on my CoCo system
under OS-9 and burnt the binaries into EPROMs using a home-made
programmer on the CoCo.
I still have all the hardware, still all works. My Motorola databook
is still on the shelf, although the pages are falling out due to all
the use it has had. Still love the 6809.
-tony