Re: CBM-II Colour mod

From: André Fachat <afachat_at_gmx.de>
Date: Thu, 09 Nov 2017 06:53:48 +0100
Message-ID: <15f9f576de0.2813.b4d1f2b66006003a6acd9b1a7b71c3b1@gmx.de>
Am 8. November 2017 4:41:23 PM schrieb Mia Magnusson <mia@plea.se>:

> Den Tue, 7 Nov 2017 19:19:44 +0000 (UTC) skrev Steve Gray
> <sjgray@rogers.com>:
>
> It's interesting that the 8296 has two banks of 64k, but has the data
> bus in parallell and reads two bytes for the graphics between each cpu
> memory access.

See details about the 8296 crtc integration here. 
http://www.6502.org/users/andre/petindex/crtc.html#8296

Memory is accessed in 4MHz and does 2 consecutive reads in the CPU's Phi1 
part of the cycle to accommodate for the 80 column display.

André



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