19 Sep
2025
19 Sep
'25
12:16 p.m.
The 6502 was s'posedly develeped because Motorola was upset that the 6500?
was too closely based on the 6800.
6800 never really caught on until the 6809 (a really great chip), but the
6502 was immensely popular (although, nowhere near as much as the
8080/Z80)
On Fri, 19 Sep 2025, ben via cctalk wrote:
On 2025-09-19 10:52 a.m., Christian Liendo via cctalk
wrote:
I think without the 6502 and the consumer
machines based on them, that
wouldn't have happened or it would have taken longer.
Here I think the 6800
had a big impact as the 65xx was to pin and timing
compatible device. With that memory model Apple and others developed the
video cycle on first phase of the clock and ram access on the second half.
Mostek's 4K dram was also a major factor. Two hardware simplifications over
chips using a different bus cycle.
Ben.