Re: Hardware emulation of 6509 using 6502?

Den Fri, 2 Mar 2018 09:20:38 +0100 skrev Mia Magnusson <mia@plea.se>:
> Den Wed, 28 Feb 2018 01:35:18 -0600 skrev Jim Brain
> <brain@jbrain.com>:
> >   * On a hunch, I inverted the PHI signal going to the 6502, so it
> >     matched PHI1_6509.
> > 
> > The B128 booted up.
> > 
> > I had been using the following datasheet for the 6509 reference:   
> > http://archive.6502.org/datasheets/mos_6509_mpu.pdf
> > 
> > Which is linked from Wikipedia, and from the 6502.org web site.
> > 
> > which shows pin 40 as PHI2_IN, and pin 38 as PHI1_IN
> > 
> > But, the p500 schematics on Zimmers.net shows them reversed:
> > 
> > http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/b/4256041-01of15.gif
> > 
> > As does the B128 LP schematic:
> > 
> > http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/b/8256043-01of14-left.gif
> > 
> > And the B128 HP Schematic:
> > 
> > http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/b/8256059-01.gif
> > 
> > Thus, it appears the official datasheet is wrong, and has been wrong
> > for 40 years.
> 
> This also means that Steves KiCad library should be updated as it has
> the pinout from the datasheet and not from the P/B schematics and real
> life observations.

Diff:

278c278
< X 02 38 -700 -350 300 R 50 50 1 1 O
---
> X 02 40 -700 -350 300 R 50 50 1 1 O
300c300
< X 01 40 -700 -250 300 R 50 50 1 1 O
---
> X 01 38 -700 -250 300 R 50 50 1 1 O
 



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