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PC Specialist's Handbook
Parallel port communication
e450/75, e451/651
There is one standard parallel port using a standard 25-pin female D-type connector. The following mode is
supported:
Standard mode (SPP) :
The port interface logic and buffers are placed in the:
SMC FDC37C665GT
The on-board parallel port can be configured to LPT1 or LPT2, it can be disabled through the Resident SETUP
Utility.
x251/451/651
x451/XXXs and x651/XXXs
s450/133n and s650/133
There is one multi-mode parallel port using a standard 25-pin female D-type connector. The parallel port mode
can be set through the Resident Set-up Utility. The following modes are supported:
Standard mode (SPP) :
Enhanced mode (EPP):
High speed mode (ECP): Microsoft and Hewlett Packard Extended Capabilities Port, compatible with IEEE
The multi mode port interface logic and buffers are placed in the SMC FDC37C665GT.
The on-board parallel port can be configured to LPT1 or LPT2, it can be disabled through the Resident SETUP
Utility.
PCI bus enhanced IDE interface
There are two enhanced PCI (master mode) bus IDE controllers/interfaces on the system board (build in the
OPTi 82C558M) which can handle up to four IDE devices. The 82C558 supports PIO modes 0 to 4 and DMA
multiword mode 2 timing. An integrated 32byte read prefetch FIFO and an 32byte posted write FIFO supports
bus mastering burst read and write operations on the PCI bus. The primary IDE bus can handle up to 2 hard
drives or other iDE devices, and the secondary IDE bus can handle up to two non-hard drive IDE devices.
The master IDE interface, when enabled, reserves IRQ 14, and IRQ 15 is used if the slave IDE controller is
enabled. The on-board PCI bus IDE interfaces can be Enabled/Disabled from the Resident SETUP Utility.
Keyboard & mouse
The keyboard and PS/2-type mouse are controlled by an Intel 8742 (or compatible) single chip processor.
The code of the keyboard processor is based on ICL's own BIOS/KBC platform.
Video
e450/75, e451, e651, x251, x451, x651
The on-board PCI bus video (ErgoGrafix 422i) is controlled by an ATI-264CT chip with 1MB of video RAM
(DRAM), which is expandable up to 2MB. The timing parameters have been set so that 70ns RAM modules or
faster can be used. The ATI-264CT has a build-in RAMDAC, which can handle pixel frequencies up to 135MHz.
The ATI-264ct is a 32-bit video engine, slave, which is connected directly to the 32-bit on-board PCI bus. If the
video RAM is 1MB, the data path between the video memory and ATI-264ct chip is 32-bit wide, if the video RAM
is 2MB, the ATI ct-chip can utilize 64-bit data path. The video interface is DDC2B compatible. The On-board
ErgoGrafix 422i is automatically disabled by the plug and play BIOS when a PCI or ISA video board is installed.
s450/113n and s650/133
First Edition, Release 4 - June 1998
IBM PC/XT, PC/AT, and PS/2 compatible bi-directional parallel port.
IBM PC/XT, PC/AT, and PS/2 compatible bi-directional parallel port.
Enhanced parallel port, compatible with IEEE P1284-I specification.
P1284-I specification.
ErgoPro e-, x- and s- Series
Page 63
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