NEC_PC-9801F_Motherboard_with_V30.jpg
Summary
Description NEC PC-9801F Motherboard with V30.jpg | |
Date | |
Source | Own work |
Author | Darklanlan |
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Licensing
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Annotations
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192KB video RAM
128KB main RAM
320KB external floppy drive interface port
Monochrome and RGB monitor out
Keyboard port (Mini DIN-8 connector)
Reset switch
Slide switch to select 5 or 8 MHz CPU clock speed
Configuration DIP switches
Connect with Kanji character ROM board (Refer to File:PC-9801F Kanji ROM board.jpg )
Connect with 640KB floppy drive interface board
Connect with 16-bit 'C-Bus' expansion board (backplane)
NEC V30 CPU (Original machine has NEC's clone of Intel 8086 , and V30 is around 30% faster than 8086.)
AMD 8259 Interrupt Controller (clone of Intel 8259)
NEC 8284 Clock Generator (clone of Intel 8284)
NEC 8237 DMA Controller (clone of Intel 8237)
14.318 MHz and 21.0526 MHz oscillators generate pixel master clock
Beep speaker
NEC μPD1990 Real-Time Clock (RTC) chip
Power supply connector
Rechargeable battery for RTC and SRAM (removed)
32KB BIOS ROM and 64KB built-in BASIC ROM