Specifications

TABLE I I/O ADDRESSES AND FUNCTIONS FOR THE QUARK (CONTINUED)
I/O DEVICE &
ADDRESS REGISTER
FUNCTION (READ / WRITE)
98 LAN INTERRUPT LAN interrupt status/control register
(Q/200 only) -status reg bit 7=1: LAN interrupt pending
-control
reg bit 7=1: LAN interrupts enabled
-control
reg bit 7=0: LAN interrupts disabled
-writing to this port clears LAN interrupt
99-BF I/O alias Not recommended for use.
CD-FF User /CS output Active low output on pin A-14 of the ESIC
connector. Use to seLect a single externaL
peripheral device, or to qualify decoding of
address
Lines for multiple externaL
peripheraL devices.
Notes:
1. For software compatibility between current and future QUARK single-board computers, it is
reconmended that I/O addresses indicated as "Reserved" or "I/O aLias" not be used in
progranming the QUARK.
2. The Parallel Printer Data Strobe output is driven an inverting TTL buffer on version 04R01
and earLier QUARK/100s, on revision 05ROO and later QUARK/1OOs, this output is driven by a
non-inverting buffer.
-------------------._._-.-..- ,-------~-~~~~,-.------------------------
TABLE IIa TIMER-1 BAUD RATES FOR FULL-DUPLEX INTERFACE - 50HZ VERSION
BAUD
DIVIDE BY 1 DIVIDE BY 16 DIVIDE BY 64
RATE
VALUE (HEX) ERROR VALUE (HEX) ERROR
VALUE (HEX) ERROR
--------
--------
19200 39 0027 -.95
1
0001 -8.26
-1 000-1 -15.91
9600
79
oo4F -.03 3 0003 6.22 0
0000 -27.92
7200 106 006A -.10 5 0005 -.33
0 0000
-3.89
4800
160
ooAO -.18
8
0008 3.50
1
0001 -8.26
3600 214 0006 -.22
C OOOC -2.15 2
0002 -10.30
2400 321 0141 .05 18
0012 2.19 3
0003 6.22
1800 429 01AD -.05 25
0019
.60
5
0005 -.33
1200 644 0284 .01 39 0027 -.95 8
0008 3.50
600 1290 050A -.01
79
004F -.03
18
0012 1.55
300 2582 OA16 -.02
160 ooAO
-.18 39
0027 -.95
150 5165 142D .00
321 0141 .05
79
004F -.03
134.5
5760
1680 .01 358 0166
.11 88
0058
.31
110 7044
1B84
.00
439 0187 -.09
108 006C
.31
75 10332 285C .00
644
0284 .01
160 OOAO -.18
50 15498
3C8A
.00
967 03C7 .00
240 OOFO
.18
* Not
reconmended.
Use the Divide-by-16 mode.
Megatel Computer Technologies Toronto, Canada
Appendix
Page A-4