22 Aug
2007
22 Aug
'07
4:42 p.m.
Tony Duell wrote:
1) One site i looked at said a VT240 is a monochrome
unit, a VT241 is the
colour version. Is the only difference the monitor? Can I use a colour
monitor with my base unit?
As far I know it, all of them were color capable. Just
the monitor &
cable was different.
3) How much is known about the insides? Of course
I've taken it apart.
It's really easy to get inside, just undo 2 screws on the bottom at the
very front and remove the top cabinet shell (lift it up from the front).
Then release 2 nylatch fasteners and lift up the metal screening cover.
The PSU (a switch-mode unit) is inside the cover. Reach inside and unlug
the PSU ribbon cable from the mainboard and remove the cover/PSU. The
mainboard comes out by releasing 3 more nylatch fasteners.
Also a space & connector for a modem option.
On this board, there's an 8085, 2681 (dual serial
chip), 8251 (USART,
maybe used for the keybaord interface), 7220 (graphics chip) -- along with
what seemms to be much the same circuitry as a Rainbow colour card, there
are a couple of PALs, I've not checked to see if they're the same as the
ones in the 'bow. Pletny of RAM and ROM, and some glue logic. And another
40 pin chip, DC310. For some reason this is saying 'processor' to me. Is
it?
Should be a T11