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RE: [N8VEM-S100:1888] S-100 MSDOS Compatibility Level ?



Nothing has “frozen up” for me ever! However I mainly do hardware.  I am currently running MSDOS 4.01 with an 80386.  But have over the years run it with 8088, 8086 and 80286 CPU boards – all very simple/standard programs.   Not quite sure what you mean by freezing up.  If you push the hardware – particulary without bus termination things will freeze. I generally work at 10MHz (actual S100 bus phi clock speed).  Have been beyond 12MHz but then freezes will happen.   Its more a function of your hardware old/new boards etc. than anything else. To state the obvious bad software will freeze!

 

John

 

 

 

 

 

John Monahan Ph.D

e-mail: mon...@vitasoft.org

Text:    mon...@txt.att.net

 

 

From: garethj...@gmail.com [mailto:garethj...@gmail.com]
Sent: Tuesday, September 10, 2013 7:02 PM
To: n8vem...@googlegroups.com
Cc: mon...@vitasoft.org
Subject: Re: [N8VEM-S100:1888] S-100 MSDOS Compatibility Level ?

 

Not bad.   I'll have to check to see what programs are compatible with MSDOS v4.01.

 

How stable is 4.01 ?  Can I expect a continuous 2 hour session without crashing or does the machine freeze up regularly etc ?

 

Just wondering if theres any pain points and how painful they are :)

 


On Wednesday, September 11, 2013 1:55:41 AM UTC+10, monahanz wrote:

DOS 4.01 is the furthest I have brought things so far.  Probably can go higher but the 8086 monitor may  need to be better tweaked.  The MSDOS support board has only one 8259A PIC and no DMA controllers. May have to work around this. I have thought of doing a DMA controller(s) S-100 board but it will be some time yet.

 

John

 

 

John Monahan Ph.D

e-mail: mon...@vitasoft.org

Text:    mon...@txt.att.net

 

 

From: n8ve...@googlegroups.com [mailto:n8ve...@googlegroups.com] On Behalf Of garet...@gmail.com
Sent: Monday, September 09, 2013 9:32 PM
To: n8ve...@googlegroups.com
Subject: [N8VEM-S100:1888] S-100 MSDOS Compatibility Level ?

 

Hi All,

 

Im a newbie looking at getting my feet wet in my first homebrew computer. 

 

Just wondered what level of MSDOS Compatibility to expect for the S-100 platform ?  I'm more keen on the S-100 platform than ECB one, since I would love to play around with more advanced boards like the new 286 CPU board and 68k board. 

 

I've noticed theres a dedicated MSDOS Compatibility board.  I would love to run older simple DOS apps but figured better ask what to expect from overall MSDOS compatibility.   Does it support up to 6.22 without many issues or should I expect to run 3.x versions stable etc ?

 

Appreciate if I can get a rough idea what to expect before rushing in. :)

 

Many thanks

 

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