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Asynchronous Floppy Drive Emulator - AFD
The Asynchronous Floppy Disc Unit (EVI-AFD) is an Electronic Visions,
Inc. software product which provides a low cost replacement to MODCOMP's
Model 4532 Asynchronous Floppy Disc (AFD) System. The PC-based processor
system is connected as a peripheral device to a MODCOMP host computer via
an RS-232C half-duplex asynchronous communication channel. EVI-AFD is supported
as a data storage device with the MODCOMP Asynchronous Floppy Disc handler
which combines asynchronous channel and floppy disc commands. The EVI-AFD
software will operate in a rack mounted, desktop, mini-tower, or notebook
PC/AT configuration.
The EVI-AFD offers single and dual density hardware sectoring, providing
15 and 26 sectors per track. All sectors have a fixed data length of 256
bytes. Commands and status are transferred with a frame size of eight bits
with selectable parity. The AVI-AFD provides remote and local fill features
for use with the host MODCOMP computer. The Format function is performed
via an offline file format program. The Copy function is performed via
Standard DOS file copy command. The Local Fill is performed via the F6
function key, Write Protect is toggled via the F7 function key for floppy
0 and the F8 function key for floppy 1. The Remote Fill can also be performed
on Startup of the EVI-AFD software to allow auto-startup after power fail.
Features
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PC/AT Controlled Diskette System one megabyte |
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Multiple Asynchronous Channel Compatibility |
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Standard MODCOMP 15 Selectable Baud Rates |
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Selectable Parity Checking (Even, Odd, None) |
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Half-Duplex Operation |
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Selectable Density 295K bytes to 512K bytes |
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MODCOMP II/IV/Classic Diagnostic Utility Load Device (Fillable/DAX Relocatable) |
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Remote/Local Program Fill via Function keys |
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Remote/Local Program Fill on startup |
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Replaces obsolete hardware (AFD) |
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Increases performance by 75% to 100% |
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Utilizes PC/AT hardware technology for low cost and high reliability |
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Supports MODCOMP hardware diagnostics |
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All MODCOMP diagnostics loaded on hard drive for Local Program fill along
with your OS and data files |
SOFTWARE (Prerequisites)
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Standard MODCOMP® AFD Handler |
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MAX IV/MAX 32 OS |
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PC/AT DOS |
HARDWARE (Prerequisites)
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MODCOMP System |
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Asynchronous Controller |
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Cabling to connect to EVI-AFD |
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PC/AT system 286+ with hard drive, floppy, RS-232C Comm Port and optional CRT |
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Keyboard |
Compatible Communications Controllers
1907-X |
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Universal Communications Subsystem with a 1931 RS-232C interface module.
1097-X = (1907, 1907A, 1907B) |
1908-1 |
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Integrated Communications Subsystem with model 1909-1 RS-232C interface. |
4804 |
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Quad Channel Interface Controller with model 4803-1 RS-232C interface. |
4806 |
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Asynchronous Terminal Controller with an RS-232C interface. |
4807 |
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Asynchronous Terminal Controller with an RS-232C interface. |
4808 |
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Asynchronous Modem Controller with an RS-232C interface. |
4809 |
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Octal Asynchronous Controller with an RS-232C interface. |
4850 |
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Multifunction Controller with a 4858-1 RS-232C Port Option interface. |
Model Numbers and Descriptions
AFD-1 |
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Software Only |
AFD-2 |
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Software with a PC-AT in a Low Profile 19" rack mounted enclosure.
(Height: 4 ¼ in.) |
AFD-3 |
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Software with PC-AT in a Desktop or Minitower case. |
AFD-4 |
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Software with PC-AT Notebook configuration. |
Physical Characteristics
AFD-2 |
PC-AT in a Low Profile 19" rack mounted enclosure. |
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Height: 4 ¼ in.
Depth: 16 in.
Width: 19 in.
Weight: 15 lbs.
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MODCOMP and CLASSIC are registered
trademarks of Modular Computer Systems, Inc.
PC-AT may be a trademark of International Business Machines
EVI-AFD is a trademark of Electronic Visions, Inc.
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This page last modified on 08/19/97
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