generic486
Experienced Member
I know it used with primarily with DOS 1.0 but did later machines use 2.1 like the XT?
I know it used with primarily with DOS 1.0 . . .
Versions 1.0 and 1.1 were very limited, and 2.0/2.1 were excellent. I don't see why anybody buying a new machine would buy an old version of DOS to run with it.. . . but did later machines use 2.1 like the XT?
Technically, the 5150 wasn't sold with any OS. There was no hard drive like newer machines so no OS was included. Originally, you could choose to buy CPM, DOS or simply use the ROM BASIC.
When I purchased my 5150 in 1984, I bought DOS 2.1 to use with it.
I'm just wondering what my 5150 would have been sold along with. My 5150 is a later 5150, I think possibly 1986, I'll have to ask the seller.
Probably find after a year of owning it they wanted another drive but IBM had switched to half height.Yes, I see. I'm suprised anybody bought 5150's in 1986. The one I have has one full height drive and one half height drive (no hard drive), both made for IBM. Either they ran out of full height drives or they had a hard drive in mind for customers so they didn't need to reduce the full height drive to a half height one.
Yea, by then I think they replaced the original 5150 with floppy only 5160s.Yes, I see. I'm suprised anybody bought 5150's in 1986. The one I have has one full height drive and one half height drive (no hard drive), both made for IBM. Either they ran out of full height drives or they had a hard drive in mind for customers so they didn't need to reduce the full height drive to a half height one.
It looks like you are one year off. 1987 was when IBM replaced the PC with the PS/2.But it's my understanding (I can't confirm) that in 1987 when they released the new enhanced 5160 (which I have) with 640KB RAM they also switched to using dual half height drives and a half height 20Mb hard drive.
Yes, I see. I'm suprised anybody bought 5150's in 1986. The one I have has one full height drive and one half height drive (no hard drive), both made for IBM. Either they ran out of full height drives or they had a hard drive in mind for customers so they didn't need to reduce the full height drive to a half height one.
fallo said:The 64k-256k 5150 was introduced in March 1983 simultaneous with DOS 2.00
The double-sided drives and second-revision BIOS 5150s were released at the same time as DOS 1.10 -- in the spring of 1982.
When the double-sided drives came out, they were optional. The SS drives were still available, and so was the cassette model of the 5150. Both of those were discontinued when DOS 2.00 was released.
The 64k-256k models were only available with DS drives. After 1983, the 5150 remained unchanged until it was retired in early 1987, the only new thing being the arrival of EGA in 1984. Unlike the XT, it never got half-height drives or support for 101-key keyboards and 3.5" floppies.
Not at all uncommon, Ole. When I bought my (64K) PC, it had a single-sided FH drive installed, the minimum to run DOS. DOS 1.x floppies were either 160K for single-sided or 320K for double-sided. That is, they were recorded with 8 rather than 9 sectors per track. I added a FH B: drive very quickly thereafter.
Half-height drives really came into their own when the Japanese started selling them. That pretty much forced everyone to offer them--and after a time, they were all that was stocked by dealers.
Yea, by then I think they replaced the original 5150 with floppy only 5160s.
Guys, I will be able to find out in more depth when it arrives. This is just what I've been told/deduced.
It is a YE DATA drive which IBM had as a primary supplier from 1984 until the early Aptiva days (1994). It looks identical to the IBM PCAT 360k drives (with asterisk) except it has a black bezel. How long did IBM warranties last? I have a Model F AT keyboard produced 21 April 87 and bought sometime in Nov 1987 according to astamp on the back. I suspect this was a replacement keyboard as it was produced after the 2 April 87.
Did you mean that adding a second drive at a later date was not uncommon?