Re: basic1-patch from vice in a real PET

Yes, the universal dynamic pet motherboards are wired to allow a 4K editor ROM, minus the $E8xx I/O space. I have a project to build custom editor roms that can use this space here:
http://www.6502.org/users/sjgray/projects/editrom/index.html

So for example, you can build a ROM that lets 80-column machines have a "Soft-40" mode for running 40-column games, or have a built-in wedge (thanks Nils) for making SD-card storage easier to use, adding ESC codes for accessing the windowing features, or even using a completely different keyboard (Like the C64 keyboard).  I also have a real 40/80 column video switcher board for the PET here:
http://www.6502.org/users/sjgray/projects/multied4080/index.html

Which can be software controlled using ESC-X just like the C128 does.
Check it out!

Steve

      From: Mia Magnusson <mia@plea.se>
 To: cbm-hackers@musoftware.de 
 Sent: Thursday, February 8, 2018 4:39 PM
 Subject: Re: basic1-patch from vice in a real PET
   
Den Thu, 8 Feb 2018 20:34:58 +0100 skrev Francesco Messineo
<francesco.messineo@gmail.com>:
> No PET, as far as I know, has ROM in E8-EF, that's where the I/O
> chips "live" (6520s, 6522, 6545 on CRTC versions).
> E0-E7 2K space is where the "editor" ROM is mapped.

According to this memory map, on some PETs only E800-E8FF is decoded
for I/O and E900-EFFF can be used for 1.75K rom.

So there seems to be PETs with ROM in this area.

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