From 7e8b9b2863a7e4245dc724afd85735fe450f2e1f Mon Sep 17 00:00:00 2001 From: AJR Date: Wed, 2 Oct 2019 19:08:13 -0400 Subject: [PATCH] m37710: Add note (nw) --- src/devices/cpu/m37710/m37710.cpp | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/devices/cpu/m37710/m37710.cpp b/src/devices/cpu/m37710/m37710.cpp index df78cdafe74..58e1bf9537d 100644 --- a/src/devices/cpu/m37710/m37710.cpp +++ b/src/devices/cpu/m37710/m37710.cpp @@ -31,6 +31,10 @@ - Unlike the 65C816, the program bank register (known here as PG) is incremented when PC overflows from 0xFFFF, and may be incremented or decremented when the address for a relative branch is calculated. + - The external bus, if used, allows for 16-bit transfers, and can be + dynamically reduced to 8 bits by asserting the BYTE input. (The + 65C816 has an 8-bit data bus.) Internal memory is also 16 bits wide, + but parallel port registers must be accessed as individual bytes. The various 7700 series models differ primarily by their on board peripherals. The 7750 and later models do include some additional