[Simh] VT240, VT340 and DS200/300 HW specs info

[Tim Stark]

Folks,

 

I figured some technical manuals and schematics out. 

 

DS200 uses 68000 processor with AM7990 (LANCE) and 4 2681 DUARTs. 

DS300 uses 68020 processor with TC23SC241AP and 8 2681 DUARTs.

DS500 uses KDJ11-SD processor (11/53) with CXA16/CXB16 devices. 

 

VT240 uses T11, 8051 and 8251 processors  with 2681 and PD7220 graphics
processor. It supports up to 64 colors.

Both VT240 and VT241 uses same PD7200 circuit board for monochrome and color
monitors.

I noticed that VT241 is not implemented on MAME emulator yet.  Should just
add a few code lines to generate both color and monochromes.

 

VT340 uses 8031/8051 processor with 2681 and custom graphics processor. It
uses 4 DC 322 Viper Gullwin (each bitmap plane).

(I can't find DC 7051 (timing generator) and DC 322/323 (Adder/Viper) tech
docs so far).  It uses 4 bitmap planes.

It supports up to 4096 colors but can only select 16 colors from them.

 

I first thought VT125 is only monochrome terminal. It supports 64 colors
with external video connector.

VT100 series technical manual provides some info about VT105 and VT125
graphics processor.

VT125 is not implemented on MAME emulator yet.

 

VT180 uses Z80A processor for CP/M operating system.

VK100 uses 8085 processor with BASIC interpreter.

 

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