Address Map - Philips PCL304 Service Manual

3-2
3.2.2 Address Map
VO Address Map
1 000 -O1F DMA controller #1
020 - O3F Interrupt Controller #1
| 040 - o5F
1 O60 Keyboard Controller |
| 062 - O6F
|
fost Port B Register, PPI
f 070 -07F Real Time Clock, NMI (Non-
interruptable Mask) bit |
| os0-o8F | DMAPageReg ss
f Reset
093 - OOF DMA Map Reg.
OAO - OBF Interrupt Controller #2
| OCO-ODF_ | DMAController #2
| oFo-oFF | MathCoprocessor
| 1£8-1E9 | PMUControlReg
[ 1EC-1EF | EMSandContolReg
[ 2Fe-2FF | SerialPot2 ss
| 300-31F | Reseved ss Cd
| 378-37F | Parallel printer port 1
| 380-3AF | Reserved
| 3B0-3DF | Video Graphics Monitor
i Adapter
3FO - 3F7 Diskette Controller |
| 3F8 - SFF_ | SerialPorti
At power-on time, the Non-Maskable Interrupt (NMI) into the
80386SX is masked off. The Mask Bit can be set and reset
with System Programs as following:
Mask on : Write to I/O address hex 070, with
data bit 7 equal to a logic 0.
Mask off : Write to 1/O address hex 070, with
data bit 7 equal to a logic 1.
CS 55 804