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mc68681: Note on model differences (nw)

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AJR 2017-11-22 14:58:39 -05:00
parent 0068ae6547
commit 3d32ab63d4
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src/devices/machine/mc68681.cpp
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@ -11,6 +11,12 @@
Improved interrupt handling by R. Belmont
Rewrite and modernization in progress by R. Belmont
Addition of the duart compatible 68340 serial module support by Edstrom
The main incompatibility between the 2681 and 68681 (Signetics and Motorola each
manufactured both versions of the chip) is that the 68681 has a R/W input and
generates a 68000-compatible DTACK signal, instead of using generic RD and WR
strobes as the 2681 does. The 68681 also adds a programmable interrupt vector,
with an IACK input replacing IP6.
*/
#include "emu.h"