Tall Tree Systems`JRAM-3'

From: Fred Cisin <cisin_at_xenosoft.com>
Date: Sun Dec 2 13:27:21 2001

On Sun, 2 Dec 2001, Tony Duell wrote:
> 8 rows of 9 41256s sounds like 2Mbytes of parity-checked RAM. That's too
> much for an 8088 to address directly. So this is probably some kind of
> paged memory board, quite likely to be so called 'expanded memory'.

RIGHT!!

> > doesn't it? Combo card? it's got a looong double-row of pin sockets along
> > the bottom just above the ISA connector, and another single row up the whole
> > edge between the external connectors (male 9 pin & female 25 pin) and the
> > components. Maybe a daughter board? It's got one 6-position DIP switch at
> Myabe a daughterboard for more I/O.

THAT daughterboard I haven't seen.


> The 9 pin D plug sounds like a serial port. Is there a UART chip (40 pin,
> 8250, 16450, 16550) on the board anywhere? What about 1488 and 1489 chips
> (RS232 buffers).

No UART. No 1488. No 1489.

> If those chips are not on the board, then maybe the external connectors
> just link to the row of sockets on the PCB near them, and you need the
> daughterboard for any I/O functions.

RIGHT!!


Since you use CX laser controllers, perhaps you would like one/many ISA
ones??? daughter card for JRAM?, on board along with the RAM on JLASER.


The JLASER interface was supported by Xerox Ventura, Z-SOFT (PCPaint,
etc), and a lot of others.

There were also emulators for Postscript and for HP PCL that ran with
the JLASER.
Received on Sun Dec 02 2001 - 13:27:21 GMT