jackrubin
Veteran Member
@barythrin - I started using micros while still working on a PDP-11. The lab I was in got a Cromemco Z-2 (S100 CP/M machine) and interfaced it to the PDP.
In 1980/81 I got a small inheritance which would allow me to buy my own computer; I had just about narrowed the choice down to an Apple II with Z80 CP/M card when the Osborne came out. Cost was about $1000 with nearly that much value in software included (WordStar, SuperCalc, DBaseII) which made it a much better buy than anything else available.
I bought one of the first Osbornes in the Chicago area and was pretty happy with it but quickly ran into a couple issues - storage and online capabilities. Disk capacity was something like 80K(?) and my modem ran at 300 baud. It was also difficult to move data back and forth between home and the lab since everything there was on 8" disks (the Z-2 had a Morrow Disk Jockey DMA controller). When a used IMSAI became available, I was quick to grab it. A souped up PMMI modem gave me 450 baud to the local BBS and a pair of Qume 8 floppies on a Tarbell DD controller gave me 1.2 MB per disk, faster load times and better reliability!
The front panel wasn't too useful most of the time but it was handy when regenning the system since you could built the new BIOS in RAM and then JMP (C3 is burned into my mind...) to the new starting address, come up running and then write it back to the boot tracks. And of course, having a solid S100 platform (the chassis had a Godbout motherboard with terminator) allowed me to modify my system as desired.
Jack
In 1980/81 I got a small inheritance which would allow me to buy my own computer; I had just about narrowed the choice down to an Apple II with Z80 CP/M card when the Osborne came out. Cost was about $1000 with nearly that much value in software included (WordStar, SuperCalc, DBaseII) which made it a much better buy than anything else available.
I bought one of the first Osbornes in the Chicago area and was pretty happy with it but quickly ran into a couple issues - storage and online capabilities. Disk capacity was something like 80K(?) and my modem ran at 300 baud. It was also difficult to move data back and forth between home and the lab since everything there was on 8" disks (the Z-2 had a Morrow Disk Jockey DMA controller). When a used IMSAI became available, I was quick to grab it. A souped up PMMI modem gave me 450 baud to the local BBS and a pair of Qume 8 floppies on a Tarbell DD controller gave me 1.2 MB per disk, faster load times and better reliability!
The front panel wasn't too useful most of the time but it was handy when regenning the system since you could built the new BIOS in RAM and then JMP (C3 is burned into my mind...) to the new starting address, come up running and then write it back to the boot tracks. And of course, having a solid S100 platform (the chassis had a Godbout motherboard with terminator) allowed me to modify my system as desired.
Jack