Epson QX-10 TECHNICAL MANUAL TROUBLESHOOTING

Epson QX-10 TECHNICAL MANUAL TROUBLESHOOTING

Features Epson QX-10

The OX-1 0 is an all business computer system. It consists of a Z80A-compatible CPU, a memory of 256 KB maximum, two floppy disk drivers of double-sided, double-density, 5-1/4" disks, and a 12" full-graphic CRT display with a resolution of 640 by 400 dots.

The standard configuration includes a programmable timer, Centronics-compatible printer interface, RS-232C interface, C-MOS RAM backed up by battery, clock and calendar, and separate keyboard. It has five card slots which permit installation of optional cards as required. Optional cards available include character generators of varying fonts, IEEE-488 interface, optical fiber interface, color CRT interface, and pulse transformer interface.

Hardware configuration Epson QX-10

General Epson QX-10

The OX-10 is composed of three units: the main system unit, the keyboard unit, and the monitor unit. The main system unit, the heart of the QX-10 system, includes the main circuit board, sub circuit board, power supply, two 5-1/4" floppy disk drives developed by Epson, and five slots permitting installation of optional cards. The keyboard unit is connected to the main system unit with a curled cord through which signals may be transmitted in any direction. The standard monitor unit is a 12" high resolution green monitor capable of displaying bit images.

Hardware Epson QX-10

Main system

CPU .uPD780AC-1 (Z80A compatible, 4 MHz)
Memory - RAM : 256 KB (maximum on main board)
  - VIDEO RAM : 128 KB (maximum on CRT board)
  - C-MOS RAM : 2 KB (standard, backed up by battery)
  - EPROM : 2/4/8 K8 (for IPL)
Clock C-MOS real-time clock (backed up by battery)
Speaker Permanent magnet speaker
Interfaces Printer interface (Centronics-compatible) RS-232C communications interface
DMA 7 channels
Interrupt levels 15
Counter/timer 6 channels
FDD 5-1/4" FDD x 2
320 KB x 2 drives
48 TPI, double sided & double density
Card slots 5
Monitor 1 2" green monitor
640 x 400 dots
Keyboard

ASCII, HASCI

 

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