Re: [CAD_CAM_EDM_DRO] Limit and Homing switches

Hi Jerry,

Actually, I was thinking that Drew might have written it from a previous
comment he made. I haven't looked at the code again to see or try it
out.

I have edited MSDOS.SYS, and have been booting my development system as
you describe. That's why I was surprised to see the effects on the
pulses. Yes, if I'm really seeing the 18.2 ms timer "tick", and other
programs are riding on it, that could explain it. Now to figure out a
way to "cut out" the other programs. I'm thinking I'll just take over
the time tick ISR. I've wanted to do that anyway, and speed it up a
little.

Nice boot menu. I've got one on another machine. But these
"freeloader" programs don't seem to be loaded by the CONFIG.SYS I see.

And on my LINUX/W98 "shop" system, I can't even FIND the MSDOS.SYS!
LILO seems to replace or take it over! I'd LOVE to find on on that
machine!

Alan KM6VV
P.S. We might like to add a CW/CCW output mode selection for steppers.
I have a couple of cw/ccw drivers (EMI medical), so I could probably
test it. BUT where's the time?

Carol & Jerry Jankura wrote:

>
> Hi, Alan:
>
> |Hi Drew, Jerry, list!
> |
> |Did you do the home in TurboCNC? I just discovered it! But I don't
> |have any home switches... yet.
>
> No, I didn't write that code.
>
> |I did observe something. I boot windoz98, just to "DOS", and run both
> |TurboCNC and my code. I thought that ought to be good enough. I still
> |had some jitter on my code's pulses that I couldn't explain. Every 20ms
> |(hard to determine), I see my pulse get very wide.
>
> Remember that DOS interrupts the processor ever 19.2 milliseconds. It simply
> updates a clock, and shouldn't eat too much time. But, add Windows or
> another driver and guess what - you've got a whole crowd that uses that
> interrupt and, all of a sudden, your pulse train gets too jittery to drive a
> motor at high speed.
>
> |I thought it was
> |just my code. Then I looked at TurboCNC's pulses. Same problem, maybe
> |worse! I thought all the "interruptions" were off! I formatted a DOS
> |boot disk from DOS (windoz98), and ran both programs from DOS, rebooted
> |from this floppy. Nice and clean (yeah, I should have known that)!
> |HIMEM.SYS is loaded, DOSKEY, DBLBUF, CRROM stuff, and a few others. I
> |recall Jerry running into EMM386 causing problems, but I didn't think
> |these others would be a problem. Now I know! Somewhere there is a
> |config.sys for the "DOS" boot of '98, but I haven't found it. The
> |"shop" machine is even more complicated, as it has a LILO boot for EMS,
> |and can also run '98. Well, at least a floppy boot works.
>
> Alan - it's not in Config.sys. in MSDOS.SYS (a hidden file) Add a line
> "BOOTGUI=0" and you should be able to boot directly into DOS without adding
> the GUI. You can then play with Config.sys to present a menu which allows
> you to use either Windows or DOS. Here is my CONFIG.SYS file:
>
> Switches=/F
> [Menu]
> MenuItem=4DOS, MS-DOS 7.1 + 4DOS CLI
> MenuItem=NORMAL, MS-DOS 7.1 + COMMAND CLI with EMM386 Driver
> MenuItem=WIN98, Windows GUI
> MenuItem=CD, MS-DOS 7.1 with CD Support
> MenuItem=NOTHING, MS-DOS 7.1 Unadorned
> MenuDefault=Win98, 10
> MenuColor 11, 1
>
> [Common]
> DOS=HIGH,UMB
> Device=C:\Windows\HiMem.SYS /TestMem:OFF
>
> [4DOS]
> SHELL=C:\4DOS-700\4DOS.COM C:\4DOS-700 /E:3072 /P
> Device=C:\Windows\EMM386.EXE NOEMS RAM HIGHSCAN
> DeviceHigh=C:\Windows\Command\ANSI.SYS
> rem Device=C:\WINDOWS\SYSTEM\mouse.drv
>
> [Normal]
> Shell=C:\COMMAND.COM C:\ /E:3072 /P
> Device=C:\Windows\EMM386.EXE NOEMS RAM HIGHSCAN
> DeviceHigh=C:\Windows\Command\ANSI.SYS
>
> [WIN98]
> SHELL=C:\4DOS-700\4DOS.COM C:\4DOS-700 /E:3072 /P
> Device=C:\Windows\EMM386.EXE NOEMS RAM HIGHSCAN
> DeviceHigh=C:\Windows\Command\ANSI.SYS
>
> [CD]
> SHELL=C:\4DOS-700\4DOS.COM C:\4DOS-700 /E:3072 /P
> Device=C:\Windows\EMM386.EXE NOEMS RAM HIGHSCAN
> DeviceHigh=\sys\oakcdrom.sys /D:MSCD001
> DeviceHigh=C:\Windows\Command\ANSI.SYS
>
> [NOTHING]
> SHELL=C:\4DOS-700\4DOS.COM C:\4DOS-700 /E:3072 /P
> DeviceHIgh=C:\Windows\Command\ANSI.SYS
>
> [Common]
> Set OS=WIN98
> Files=50
>
> And,here's my MSDOS.SYS file - without all of the lines that have the X's in
> them to take up space:
>
> [Paths]
> WinDir=c:\windows
> WinBootDir=c:\windows
> HostWinBootDrv=c
>
> [Options]
> AutoScan=0
> BootMulti=1
> BootGUI=0
> DoubleBuffer=1
> LOGO=0
>
> -- Carol & Jerry Jankura
> Strongsville, Ohio
> So many toys, so little time....
>