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vt220: Update notes (nw)

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AJR 2018-03-16 22:05:27 -04:00
parent 23ece1d07f
commit c22253d4f1
1 changed files with 4 additions and 3 deletions
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src/mame/drivers/vt220.cpp
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@ -25,14 +25,15 @@
and C only. Though it was later reprinted with an addendum for Models
D, E, and F, this has not been found. The available schematics are
inapplicable to later models, which have an altogether different memory
map. It might even be possible that later models substitute some generic
battery-backed CMOS SRAM for the X2212 and/or replace the CRT9007 with
a custom video gate array.
map and, evidently, use some different IC types: an ER5911 rather than
X2212 as non-volatile memory and, in place of the CRT9007, some sort
of custom video gate array (which might even be clocked differently).
****************************************************************************/
#include "emu.h"
#include "cpu/mcs51/mcs51.h"
//#include "machine/eepromser.h"
#include "machine/mc68681.h"
#include "machine/ram.h"
//#include "machine/x2212.h"