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JonB256 
DMX 
Joined: 19 Dec 2007 Location: Granbury, TX Online Status: Offline Posts: 130 |
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 Posted: 25 Nov 2008 at 7:24pm |
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Quick - what was the difference between Extended Memory and Expanded Memory? and the A20 gate? |
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JonB - D-Light user
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jberner
Groupie 
Joined: 12 Sep 2008 Location: Ruther Glen, VA Online Status: Offline Posts: 85 |
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Posted: 25 Nov 2008 at 8:08pm |
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Sucks to be an apple user. I hope you grew out of that habit somewhere along the lines... OPEN15,8,15,”N0:”DISKNAME,ID”:CLOSE 15 was the true mans (or kids) way to format a disk.
Deskview was an early gui if i remember right and qemm was a memory manager that was better than emm368.exe. Heck I thought I ruled the world when I ran a commodore 128 BBS with 2.2Mb storage online including early multiplayer games. Himem.sys, the first useful dos memory manager put small TSR code and other drivers like mouse.sys in to the space between the 640K and 1mb barrier. Emm386 and later qemm allowed you to put those and other types of programs in to memory beyond the 1mb limit which enabled the use of memory hog software like NIC, CD-ROM and sound card drivers in DOS which ultimately allowed us to have "great" games full of crappy grainy video for years to come. Man, what I wouldn't do for a 5K NIC driver again. I believe Expanded was the space between 640 and 1mb and extended was the space after 1mb if memory serves my correctly Sorry, the geek in me is coming out... (edited for spelling- I didnt fact check so I hope I got those right) Edited by jberner - 25 Nov 2008 at 8:13pm |
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LightChristmas
Beta Testers 
Joined: 15 Oct 2007 Location: Equality, IL Online Status: Offline Posts: 993 |
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Posted: 25 Nov 2008 at 8:39pm |
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g=c800:1 was used primarily to acces/launch the low-level format pgm for MFM, RLL and some SCSI drives. Most SCSI controllers used g=c250:5
Can't believe no one got the Drivparm - that particular command argument was used to get DOS to "see" 3.5" FDDs. Desqview - allowed multitasking on pre-windows systems, while QEMM broke the 640K barrier and allowed expanded/extended memory to be interchangeable on the fly. |
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jberner
Groupie
Joined: 12 Sep 2008 Location: Ruther Glen, VA Online Status: Offline Posts: 85 |
Quote Reply
Posted: 25 Nov 2008 at 9:41pm |
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I saw drivparm on an apple in highschool, hense my comment about it. When I saw your response after mine I goggled it and it appears that it was on an apple to allow use of an IBM floppy drive, which I guess i didnt realize at the time. I do remember the pascal teacher being excited she had 2MB on her Apple. I thoought she was an idiot because i had that on my commodore for a year+ when she got that on her crapple 2. I was a commadork so you will have to forgive me for not realizing that one piece of inferior hardware was running another...
 I have to admit if you were typing that in dos you have me beat... I came to Dos in 3.0 (or 3.2, that rings a bell too) and was mad because my 72MB ESDI hard drive had to be partitioned in to multiple drives until 3.3 came out. How many folks out there had a 287 co-processor? Edited by jberner - 25 Nov 2008 at 9:45pm |
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Pony_God
Senior Member 
Joined: 01 Sep 2008 Location: Naples, FL Online Status: Offline Posts: 551 |
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Posted: 26 Nov 2008 at 8:45am |
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Sounds right, or the other way around...
g=c250:5... That's sounds more correct... I never low-level formatted many MFM or RLL drives, just normal formatting those huge 20M 1 cubic foot drives that took an hour to spin up.
Drivparm, really? 3.5"ers? I've never had any issues accessing any 3.5 drives, nor 5.25 drives for that matter.
Ah... the extra math co-processor. You had the proc, but have it do math? oh, far too much work. No moath-co was an option up to the 486SX erra, wasn't it?
I loved those grainy games! Man, they were FAST on less than an average cell phone today. Though in some sprites, some assembly in certains places and let-her-go! AND They fit on 1 or 2 floppies! There just wasn't ANY overhead in there.... and I don't remember any bug fixes/patches every months like today's games.
5K nic driver? You don't like that the 100M driver also installs 300M of utilites, managers, registry changes, auto-loaders, balancers, notification utilites, and auto-updaters?
Man, I remember carrying around a single floppy that had multiple drivers, common files, a boot sector, telnet, and some misc. system utilites on it. |
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kalifi
Newbie 
Joined: 10 Sep 2008 Online Status: Offline Posts: 25 |
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Posted: 26 Nov 2008 at 11:03am |
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I just know my dad was pissed when I played with his 5.25 floppys with...magnets... |
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