Epson Equity 486DX2/50 PLUS User Manual - Page 194

System diagnostics tests (continued) Device Tests available Monochrome display adapter and CRT Adapter check Attribute check Character set check Graphics mode check Screen paging check Video check Sync check Run all above checks Color graphics adapter and CRT Adapter check Attribute check Character set check Graphics mode check Screen paging check Light pen check Video check Sync check Run all above checks Diskette drive(s) and controller Sequential seek check Random seek check Write, read check Disk change check Run all above checks Math coprocessor Parallel port (printer interface) Serial port (RS-232C) Alternate serial port Description Tests all types of monochrome monitors Tests all types of color monitors Tests operation of the diskette drive(s): requires a formatted diskette for some tests Tests the operation of the math coprocessor Tests the primary parallel port: requires a loop-back connector (contact your dealer) Tests the primary serial port; requires a loop-back connector (contact your dealer) Tests the secondary serial port; similar to primary serial port test Performing System Diagnostics C-9