2 Dec
2001
2 Dec
'01
1:27 p.m.
On Sun, 2 Dec 2001, Tony Duell wrote:
THAT daughterboard I haven't seen.
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. 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.