- What limited the use of the 6809 CPU in personal computers?
Why did manufacturers of home computers avoid using the 6809 CPU? I realize that the Z80 and 6502 had a 3- or 4-year head start in availability. But once it did become available in 1978, I don't
6809 Single Board Computer project – Page 4 – EEVblog
The 6809 was a great improvement over both the 6800 and the 6502, but was based almost purely on improving the 6800, taking almost nothing from the 6502. For example, the block copy inconvenience desc …
from HC11 to 6809 – Page 1 – EEVblog
i.e. 6809 is NOT object code compatible with 6800 nor 68HC11. If your code is just using 6800 opcodes, then you should be able to re-assemble for 6809 BUT if you went off the reservation with 68HC11-s …
6809 Single Board Computer project – Page 1 – EEVblog
I've been working on a 6809 Single Board Computer design and I wanted to share it with the community. I've attached the schematic as a pdf. I would be interested in hearing from anyone inter …
Motorola 6809 two stacks design – Retrocomputing Stack …
Well, the intent behind the two-stack design we can only guess today. It was definitely not the same as the intent behind the later development of User and Supervisor Stack in the Motorola 68000. The …
6809 – Advantages of a Hitachi HD6309 versus a plain …
Hitachi was a second source for the Motorola 6809 Micro Processor. The 6309 had many secret features. What advantages does the HD6309 have over the MC6809?
How did the 6809 achieve source-code compatibility with the …
17 The 6809 has 59 instructions, as compared with 78 on the 6800. So far as I can see, the 6809 lacks instructions that the 6800 has, such as aba, eorb and the transfer instructions (tba, tap and the …
Motorola 6809 Stack Blasting
The 6809 has a couple of instructions which provide very quick ways of pulling (popping) and pushing registers off and onto the stack, PULS / PULU and PSHS / PSHU. PSHx only takes 5 cycles plus one pe …
Why was the 6809 so expensive? – Retrocomputing Stack …
The 6809 was released in 1978, but looking at the usual source for price quotes for old computer components, Byte magazine, I cannot find any quotes for 1979. December 1980 lists it at $38, compare…
Elektor EC-6809 – Page 1 – EEVblog
EC-6809 has been initially published into dutch Elektor edition… With the help of a french Flex specialist, Frédéric LDg, I hope to get soon a version of Flex able to boot onto this computer with a …
コメント