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| Summary: | Use of the NEC parallel port SCSI adapter (Trantor T358) w/T4600 |
| Date: | August 17, 1994 |
| Product: | T4600C, DeskStation IV (PA2700U, PA2701U), |
| NEC parallel port SCSI adapter (Trantor T358), NEC multispin CD-ROM | |
| Problem / Issue: | T4600 will not access NEC CD-ROM drive through the Deskstation IV using NEC parallel SCSI interface (OEM'd from Trantor). The error is "Host Adapter Not Found". |
| Solution: | Connect the NEC CD-ROM directly to the T4600 |
| Additional Information: | None |
The T4600's parallel port is a EPP (Enhanced Parallel Port). When connected to a DeskStation IV, the EPP ability is no longer enabled, it becomes a standard parallel port. The adapter will work correctly when connected directly to the T4600 parallel port.
In running the installation for the SCSI adapter, two device drivers are installed to the CONFIG.SYS file :
device=C:\SCSI\CDROM\MA358.SYS
device=C:\SCSI\CDROM\neccdr.sys /d:NECCD
o MA358.SYS - ASPI manager
o NECCDR.SYS - CD-ROM device driver file
The installation program also copies the MSCDEX.EXE file (Microsoft's CD-ROM extensions) to the AUTOEXEC.BAT file. To allow the T4600 to recognize the SCSI adapter when attached to the DeskStation, you need to add the following switch to the MA358.SYS line in the CONFIG.SYS :
DEVICE=C:\SCSI\MA358.SYS /M04
The /M04 switch (default is M00) which allows no additional time for read and write cycles (default) and forces a non-EPP connection, auto detect unidirectional or bi-directional.
Allowable switches for the M358.SYS device driver are as follows :
M358.SYS /Mnm
n
The amount of additional time the read and write cycles are delayed. May be set to any value between
0-7. 0 (default) allows no cycle delays, 7 adds 875ns of delay.
m
0 Auto port detect (default)
2 Force unidirectional
4 non-EPP connection, auto detect unidirectional or bi-directional.
6 Force non-EPP and force unidirectional 8 Force EPP
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