VT180/Robin system help needed

From: W.B. <hofmanwb_at_worldonline.nl>
Date: Mon Dec 18 17:38:21 2000

The RX02 has afair 77 tracks, 26 sectors at 256 bytes giving 512512 bytes.
In RSX11M sources at some places an RX03 is mentioned at double RX02
capacity. This was never sold by DEC. But an 1 Mb 8" floppy is very much
possible.

Wim

----------
> From: ajp166 <ajp166_at_bellatlantic.net>
> To: classiccmp_at_classiccmp.org
> Subject: Re: VT180/Robin system help needed
> Date: Monday, December 18, 2000 8:06 PM
>
> From: Claude <claudew_at_sprint.ca>
> >The owner told me the Robin board was modified to use 1M drives (?).
> >There are a couple ou wire jumpers on the Robin board. Also got some
> >disks, Robin schematics, a few CP/M manuals...
>
>
> 1m???? maybe two sided 8". the best you can do with it is 800k using
> 80tr/2sided DD.
>
> >2 BNC connectors on the Robin board. Whats coming outta there? video? on
> >both? composite?
>
>
> Those are on the VT100 board. Video in and video out, VT100 can sync to
> external video. Makes a fair char gen.
>
> >What drives should I be using to boot the Robin? The RX50-AAs or the
> >Shugarts 400L?
>
>
> SA400s but if he modded the boot roms then anything goes.
>
> >I see 2 DB25 ports on the Robin board and a larger (DBxx) on the VT100
> >board, anything special?
>
>
> larger DB (37 pins) is on the VT180 card and is the FDC connector.
> The VT180 is the 54-15152 board { z80, 64k dram, 4 8251s, 1793}.
>
> >DIP switches on VT100...whats the deal there?
>
>
> config for AVO, serial port (DTR/DTC if memory serves).
>
> >Anything else I should look out for?
> >
> >Anybody know where VT180 info is available...I would like to see the
> >guts of one...
>
>
> the Vt180 design is near textbook z80 without zilog peripherals.
>
> I have a fair amount but,not scanned. I've hacked the board hard. I
> bought
> a box of Vt180 cards (about 20 of them) and mods I've worked include:
>
> Standalone (no VT100 required)
> 2 sided
> Z80 _at_6mhz
> Modded bios for 782k on 3.5" floppy
> IDE interface hacks
> CP/M in ROM
> Extended ROMs and paged ram
>
> I've used it as a stand alone printerbuffer.
>
> Allison
>
Received on Mon Dec 18 2000 - 17:38:21 GMT