Egan Ford

http://www.h-online.com/open/news/it...r-1422007.html

Kevin Dady

On Jan 28, 10:22*am, Egan Ford <dataj...@gmail.com> wrote:
> http://www.h-online.com/open/news/it...502-microproce...

heh that is good news, though I have become a bit acustom to much of
the "junk" being built in with the 1 6502 based MCU I have used
recently ... its a bit nice to just drop in a sram, a couple diodes,
and a hex inverter and basically have a functional system with serial
port access

Holger

Kevin Dady schrieb:

> On Jan 28, 10:22 am, Egan Ford <dataj...@gmail.com> wrote:
>> http://www.h-online.com/open/news/it...502-microproce...
>
> heh that is good news, though I have become a bit acustom to much of
> the "junk" being built in with the 1 6502 based MCU I have used
> recently ... its a bit nice to just drop in a sram, a couple diodes,
> and a hex inverter and basically have a functional system with serial
> port access

This is old news. You can get the 6502 from Western Design Center, but
be aware, this CMOS-Version does not run properly on the Apple II,
because of some timing problems. For the old Apple II, you still need
the NMOS 6502, which is obsolete for many years.

Holger

Steve Nickolas

On Sun, 29 Jan 2012, Holger wrote:

> Kevin Dady schrieb:
>
>> On Jan 28, 10:22 am, Egan Ford <dataj...@gmail.com> wrote:
>>> http://www.h-online.com/open/news/it...502-microproce...
>>
>> heh that is good news, though I have become a bit acustom to much of
>> the "junk" being built in with the 1 6502 based MCU I have used
>> recently ... its a bit nice to just drop in a sram, a couple diodes,
>> and a hex inverter and basically have a functional system with serial
>> port access
>
> This is old news. You can get the 6502 from Western Design Center, but be
> aware, this CMOS-Version does not run properly on the Apple II, because of
> some timing problems. For the old Apple II, you still need the NMOS 6502,
> which is obsolete for many years.
>
> Holger
>

IIRC, only the 1 MHz parts have the issue.

This is a 14 MHz part.

-uso.

Kevin Dady

On Jan 29, 12:49*pm, Steve Nickolas
<lyricalnan...@usotsuki.hoshinet.org> wrote:
> On Sun, 29 Jan 2012, Holger wrote:
> > Kevin Dady schrieb:
>
> >> On Jan 28, 10:22 am, Egan Ford <dataj...@gmail.com> wrote:
> >>>http://www.h-online.com/open/news/it...502-microproce....
>
> >> heh that is good news, though I have become a bit acustom to much of
> >> the "junk" being built in with the 1 6502 based MCU I have used
> >> recently ... its a bit nice to just drop in a sram, a couple diodes,
> >> and a hex inverter and basically have a functional system with serial
> >> port access
>
> > This is old news. You can get the 6502 from Western Design Center, but be
> > aware, this CMOS-Version does not run properly on the Apple II, becauseof
> > some timing problems. For the old Apple II, you still need the NMOS 6502,
> > which is obsolete for many years.
>
> > Holger
>
> IIRC, only the 1 MHz parts have the issue.
>
> This is a 14 MHz part.
>
> -uso.

and it depends on the II ... my //c has a cmos version in it for
instance

Steve Nickolas

On Sun, 29 Jan 2012, Kevin Dady wrote:

> and it depends on the II ... my //c has a cmos version in it for
> instance
>

I think he meant the original ][. All //cs have 65C02s.

-uso.

Alex Freed

On 1/29/2012 1:21 PM, Steve Nickolas wrote:
> On Sun, 29 Jan 2012, Kevin Dady wrote:
>
>> and it depends on the II ... my //c has a cmos version in it for
>> instance
>>
>
> I think he meant the original ][. All //cs have 65C02s.
>
> -uso.

If I remember right the timing issue can be solved by replacing some
74LSxxx chips with newer 74HCTxxx equivalents.

-Alex.

Steven Hirsch

On 01/29/2012 10:51 PM, Alex Freed wrote:
> On 1/29/2012 1:21 PM, Steve Nickolas wrote:
>> On Sun, 29 Jan 2012, Kevin Dady wrote:
>>
>>> and it depends on the II ... my //c has a cmos version in it for
>>> instance
>>>
>>
>> I think he meant the original ][. All //cs have 65C02s.
>>
>> -uso.
>
> If I remember right the timing issue can be solved by replacing some 74LSxxx
> chips with newer 74HCTxxx equivalents.

There's a one-jumper-wire hack that permits an original ][ or ][+ to work with
a CMOS 65C02. No chip replacement needed (other than CPU, of course).