Epson Equity 486SX/25 PLUS Manual de informações do produto - Página 4
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VGA Connector Pin Assignments
1
Red Video
2
3
'4
5
Red Return
7
Green Return
Blue Return
DMA Channels
Channel
Spare
1 (CTRL 1)
SDLC
Floppy drsk dnve controller
Spare
4 (CTRL 2)
Cascade for CTRL 1
5 (CTRL 2)
Hardware Interrupts
i Timer Output 0
! Interrupt from Controller 2
Parallel port 2
Floppy drsk interrupt
Parallel potl 1
RTC Interrupt
Software redrrected to IRQ2
Mouse, pomtmg dewce
Coprocessor
Hard dusk controller
l/O Port Addresses
- -
020 - 021
Interrupt controller
RTC. NMI mask regrster
DMA page registers, MFG port
OAO - OBF
Interrupt controller 2 (625QA wmpabble)
OCO - ODF
DMA controller 2 (6237A-5 compabble)
Clear math coprocessor busy
Equity Series Computers
Key
10
sync Return
11
Reserved
14
15
I/O Port Addresses (continued)
Math coorocessor
I Hard disk controller primary
200 - 207
278 - 27F
Prototype card
Floppy drsk dnve controller secondary
370 - 377
Parallel printer port 1 (378 and 37F are unused)
3 7 0
3A0 - 3AF
3D0 - 3DF
3F0 - 3R
Jumper Settings
below shows the locations of the jumpers on the
The illustration
board.
main system
system only
Miscellaneous jumper settings
Jumper
J u m p e r
JP4
JP6
A'
JP7
JP15
B
5/12/92
EQUITY 486DX2/50 PLUS
EQUITY 486SX/25 PLUS
memory board
JP7
JP8
JP9
.
JP12
JP13
JP14
JP15
Enables the burii-m VGA display adapter
can use a dtsplay adapter on an optron card as
your primary adapter
Enables the power-on password
Color monitor
IS
Monochrome monitor IS mstalled
Enables the buril-m mouse wnnector
use a mouse or other pointing devrce connected to )
a port on an option card
Sets a normal mput/output ready slgnal
I
I