CompuPro CPU 8085/88 Board, Godbout Electronics Oakland First 16 bit CPU board
In perfect condition !
Sell as is due its age !
This was CompuPro’s first 16 bit CPU board. By combining the 8085 with an 8088 on the one board it provided a convenient way for users to migrate from 8 bit/CP/M software to 16 bit systems even though the absence of a Z80 with its efficient special op-codes was a frustration.
CompuPro 8085/88 Board
The 8085 provided both hardware and software compatibility with the current crop of S-100 peripherals. The 8088 provided for greatly enhanced software capability while maintaining an 8 bit external bus for hardware compatibility. The user could switch back and forth between the two processors with a simple software command. For example, this allowed the user to let the 8085 run his currently available (and familiar) disk operating system while letting the 8088 run the more advanced applications software. One processor would then “call” the other to handle the task most suited to it. This environment is also extremely effective when trying to develop new software for the 8088. One could use tools available that run under the 8085 (such as CP/M and Sorcim’s 8086/88 Macro Cross-Assembler that ran under CP/M) to write the new code and then simply switch over to the 8088 to try it out. PROM’s did not need to be burned and erased and systems pulled apart to transfer the code to the 8088 system. The 8088 ran at 8 MHz and the 8085 at 6 MHz to maximize throughput. A switch was provided to slow the 8085 down to 2 MHz for software dependent timing loops that want to run at that speed and are not easily changed. The 8085 could of course directly address 64K bytes of memory, but the board had a built-in Memory Manager scheme that allowed access to the full 16 megabytes available per the IEEE 5-100 standard. The 8088 could directly address 1 megabyte, but their Memory Manager hardware was smart enough to know which processor is in control. Thus the 8088 used only the upper four bits of the Memory Manager so it too can access the 16 megabyte address space. The CPU 8085/88 rigidly adhered to the IEEE S-100 standard, but seemed to work quite well with most well designed pre-IEEE hardware. For example, provision is made to use the IMSAI front panel even though it doesn’t exactly fit into the new standard.
Shipping :
Europe : The price is for Air Priority Shipping with tracking number – takes about 8 – 15 working days !
USA and other Countries : The price is for Air Shipping with tracking number – takes about 15 – 25 working days !
Shipping Information:
Every Item is carefully packed and put in special box or special envelope for that use. We use our Bulgarian Post Services to send The Items Abroad. They are very reliable and good working. Every Item We send has an Tracking Number and can be tracked all over the World.
Return Policy Details:
We Accept Money Back and Replacement. The Important thing is the Buyer to be satisfied ! Please if you have any questions feel free to ask us. We will answer them As soon as we can. Wish you all best from Bulgaria !
Feedback :
Dear Customers, the Computer Parts we sell are about 20 years old. We test them twice – one time before the listing and one after the Item is Sold. We packed them with anti-static bags and put them in boxes.
Please if you have any issues with the parts when you test them contact us before leaving an feedback and We will do everything to help you !
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