Greetings to All in this forum,
I bought my Imsai 8080 in 1979 (as I recall). It had 16KB of ram (4 x 4K static RAM S100 boards). I first used paper tape for non-volatile storage. I remember manually entering the bootstrap via the front panel keys. Once the bootstrap was keyed in and running I used to get a kick out of watching it load 8K BASIC from paper tape. I then progressed to wire wrapping my own cassette interface which was based on the Tarbell design that was popular at the time. Cassette storage was sure an amazing step up in convenience. Finally a year or two later I managed to purchase a couple of Memorex 8" floppy drives and a 64KB dynamic RAM board. Eventually I managed to get CP/M 1.4 up and running after struggling with some board incompatibility issues. In time I ended up with my own customized install of 59.5K CP/M 2.2. I gained some application software memory space by placing the BIOS in EPROM which resides within the 60-64K address space of the memory map. I also ended up with an extender board and EPROM programmer board which were necessary tools. I am delighted to report my IMSAI system still boots up. I recently built a new enclosure for the Memorex drives which includes a converted surplus PC power supply for powering the drives. A couple of years ago I became interested in Android tablet BlueTooth control and decided to build an interface for my Imsai which permits me to use a modern day tablet for the console. For those that might be interested I have posted a photo album here:
https://goo.gl/photos/1MuxrsABEzUvbhnV7
As I am getting long in the tooth I am facing the need to downsize in the not too distant future. Consequently I am going to have to part with my labor-of-love Imsai, . I still need to inventory it all to document in more detail what is included so I am not quite ready to sell it yet. But it is time for me to learn about how and where to list it. I suppose eBay is one method but I wonder if there are other possibilities. I wonder if anyone here has any suggestions and if anyone can give me an idea of the market price for a working Imsai CP/M system with about 6 dozen - 8" diskettes loaded with goodies, documentation, a couple of extra boards and a couple of extra drives?
Thanks in advance for any helpful pointers!
Best Regards,
TMA
I bought my Imsai 8080 in 1979 (as I recall). It had 16KB of ram (4 x 4K static RAM S100 boards). I first used paper tape for non-volatile storage. I remember manually entering the bootstrap via the front panel keys. Once the bootstrap was keyed in and running I used to get a kick out of watching it load 8K BASIC from paper tape. I then progressed to wire wrapping my own cassette interface which was based on the Tarbell design that was popular at the time. Cassette storage was sure an amazing step up in convenience. Finally a year or two later I managed to purchase a couple of Memorex 8" floppy drives and a 64KB dynamic RAM board. Eventually I managed to get CP/M 1.4 up and running after struggling with some board incompatibility issues. In time I ended up with my own customized install of 59.5K CP/M 2.2. I gained some application software memory space by placing the BIOS in EPROM which resides within the 60-64K address space of the memory map. I also ended up with an extender board and EPROM programmer board which were necessary tools. I am delighted to report my IMSAI system still boots up. I recently built a new enclosure for the Memorex drives which includes a converted surplus PC power supply for powering the drives. A couple of years ago I became interested in Android tablet BlueTooth control and decided to build an interface for my Imsai which permits me to use a modern day tablet for the console. For those that might be interested I have posted a photo album here:
https://goo.gl/photos/1MuxrsABEzUvbhnV7
As I am getting long in the tooth I am facing the need to downsize in the not too distant future. Consequently I am going to have to part with my labor-of-love Imsai, . I still need to inventory it all to document in more detail what is included so I am not quite ready to sell it yet. But it is time for me to learn about how and where to list it. I suppose eBay is one method but I wonder if there are other possibilities. I wonder if anyone here has any suggestions and if anyone can give me an idea of the market price for a working Imsai CP/M system with about 6 dozen - 8" diskettes loaded with goodies, documentation, a couple of extra boards and a couple of extra drives?
Thanks in advance for any helpful pointers!
Best Regards,
TMA