CompuServe Archive

This is an archive of CompuServe forum messages from 1985 to 1995, as saved in transcripts by John Foust.

Search Results (19 messages)

#47976- schematics Message #48310
From: Jim Nelson Forum unknown · Hardware January 12, 1987 1:52 AM
Todd, I can't disagree much. Since C is so popular, there exist a plethora of tools and utilities that facilitate its use, also a larger pool of programmers from which to choose. Those are sound business reasons. But in my field, the world of real time, motion, robots, and sensory…
#47976- schematics Message #48310
From: Jim Nelson Forum unknown · Hardware January 12, 1987 1:52 AM
Todd, I can't disagree much. Since C is so popular, there exist a plethora of tools and utilities that facilitate its use, also a larger pool of programmers from which to choose. Those are sound business reasons. But in my field, the world of real time, motion, robots, and sensory…
From: Jim Nelson DDJ Forum · Hardware December 30, 1986 9:41 AM
I'll make it easy on Ed: Emulex makes a SCSI bussed dual ST506 drive controller, the MD01 for $395. It has a 5 1/4" form factor (meaning that it will fit inside the case of a 5 1/4" Winchester). Available from Kierulff, 1-800-367-7767 Western Digital makes a board that does…
From: Jim Nelson The Amiga Forum · Hardware December 30, 1986 9:41 AM
I'll make it easy on Ed: Emulex makes a SCSI bussed dual ST506 drive controller, the MD01 for $395. It has a 5 1/4" form factor (meaning that it will fit inside the case of a 5 1/4" Winchester). Available from Kierulff, 1-800-367-7767 Western Digital makes a board that does…
From: Jim Nelson Amiga Forum · Rendering December 17, 1986 1:40 AM
Intel has been going slowly downhill since they peaked in '83 with the wildly ignored iapx432. Too bad; it was a design far ahead of its time.
From: Jim Nelson Forum unknown · Videophile October 28, 1986 11:29 PM
Exactly the same signal is present in both places. I know this from looking at the handy set of Amiga schematics sold by Cardinal Software. Within a few days I'll have someone run some composite video test signals from a Lenco generator into a 1080 monitor, and will report back…
From: Jim Nelson Forum unknown · Videophile October 28, 1986 11:29 PM
Exactly the same signal is present in both places. I know this from looking at the handy set of Amiga schematics sold by Cardinal Software. Within a few days I'll have someone run some composite video test signals from a Lenco generator into a 1080 monitor, and will report back…
#37250 Help with Video! Message #37396
From: Jim Nelson Forum unknown · Videophile October 26, 1986 1:46 PM
A video engineer that I've worked with told me that the 1377 circuit they used came ( nearly) straight off the data sheet app note. Frank Raffaeli ( Nova Com) tells me that they left out necessary filters and that the delay line is the wrong delay. RS-170A is an…
#37250 Help with Video! Message #37396
From: Jim Nelson Forum unknown · Videophile October 26, 1986 1:46 PM
A video engineer that I've worked with told me that the 1377 circuit they used came ( nearly) straight off the data sheet app note. Frank Raffaeli ( Nova Com) tells me that they left out necessary filters and that the delay line is the wrong delay. RS-170A is an…
#34744 #86 pin vs 100 pin Message #34780
From: Jim Nelson Forum unknown · Hardware September 30, 1986 4:41 PM
The 68000 handles data transfers asynchronously. It does not require that a read or write transpire in a fixed number of clock cycles. Instead it requires a transaction acknowledgement, a handshake named DTACK, from whatever peripheral it is dealing with. This feature means that the 68K can access memory of…
#34744 #86 pin vs 100 pin Message #34780
From: Jim Nelson Forum unknown · Hardware September 30, 1986 4:41 PM
The 68000 handles data transfers asynchronously. It does not require that a read or write transpire in a fixed number of clock cycles. Instead it requires a transaction acknowledgement, a handshake named DTACK, from whatever peripheral it is dealing with. This feature means that the 68K can access memory of…
#34003 Hard Disk Interfaces Message #34316
From: Jim Nelson Forum unknown · Hardware September 25, 1986 8:45 AM
SCSI is the latest incarnation of an interface that began as SASI, and is now undergoing ANSI standardization. It supports high level control of peripherals, thus expecting some intelligence of same. There's even SCSI+, which supports communication between co-processors and other peers, acting much like a network. ST506, on the…
#34003 Hard Disk Interfaces Message #34316
From: Jim Nelson Forum unknown · Hardware September 25, 1986 8:45 AM
SCSI is the latest incarnation of an interface that began as SASI, and is now undergoing ANSI standardization. It supports high level control of peripherals, thus expecting some intelligence of same. There's even SCSI+, which supports communication between co-processors and other peers, acting much like a network. ST506, on the…
#Amiga CAD: PCLO Message #18992
From: Jim Nelson Forum unknown · Amiga at Work May 15, 1986 11:24 PM
Stan, how about a review of the PCLO package. Charles Blish gave me your name as a dealer of the PCB layout package. And I wondered at the lack of Netlist inputs, and limitations on board size. So how about it? Thanks, Jim Nelson, Chrysalis Microsystems
#Amiga CAD: PCLO Message #18992
From: Jim Nelson Forum unknown · Amiga at Work May 15, 1986 11:24 PM
Stan, how about a review of the PCLO package. Charles Blish gave me your name as a dealer of the PCB layout package. And I wondered at the lack of Netlist inputs, and limitations on board size. So how about it? Thanks, Jim Nelson, Chrysalis Microsystems
Amiga Multi-FORTH Message #14335
From: Jim Nelson Forum unknown · Programming April 10, 1986 3:56 AM
well, its a wondrous thing to behold, my amiga runs a demo in Creative Solutions Multi-FORTH at four times the rate of the same demo, written in MacFORTH, on my Lisa. It's strictly a graphics program, of course, but so are these machines. well I've got to get back to…
Amiga Multi-FORTH Message #14335
From: Jim Nelson Forum unknown · Programming April 10, 1986 3:56 AM
well, its a wondrous thing to behold, my amiga runs a demo in Creative Solutions Multi-FORTH at four times the rate of the same demo, written in MacFORTH, on my Lisa. It's strictly a graphics program, of course, but so are these machines. well I've got to get back to…
#frayed nerves Message #13860
From: Jim Nelson Forum unknown · Telecommunications April 4, 1986 10:11 PM
How many other Online! users have experienced the following: use of the notebook causes the whole workbench to disappear; attempts to send an archived captured file to another computer, (a mac), results in bizarre fragmentation of the text file recieved, ( pieces of text duplicated and sent as fragments later…
#frayed nerves Message #13860
From: Jim Nelson Forum unknown · Telecommunications April 4, 1986 10:11 PM
How many other Online! users have experienced the following: use of the notebook causes the whole workbench to disappear; attempts to send an archived captured file to another computer, (a mac), results in bizarre fragmentation of the text file recieved, ( pieces of text duplicated and sent as fragments later…