[Coco] Kip's Single Board Computer

camillus camillus.b.58 at gmail.com
Tue Sep 8 19:11:41 EDT 2015


Hi, very interesting, but where does the cpu get the 0x1212 from?

cb

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On 9/8/2015 3:17:42 AM, Tormod Volden <lists.tormod at gmail.com> wrote:
On Tue, Sep 8, 2015 at 8:27 AM, camillus wrote:
> Hi, Kip,
>
> A minimum setup would be cpu, crystal or resonator, ,eprom with startup vector at &HFFFE and &HFFFF.

As Jim suggested himself, he can just hardware 0x12 (NOP) on the data
bus. There is no need for a ROM. The CPU will fetch 0x1212 at reset
and execute NOPs from there, effectively just acting as a 16-bit
counter.

Regards,
Tormod

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