OSI Hardware by other manufacturers

billdrom · Post by **billdrom** » Fri Jul 10, 2020 9:00 pm

I am trying to bring up a D&N Z80 CPU board.
I have no documentation for the board but it does boot to a monitor prompt.

: DandN Z80.jpg (1.24 MiB) Viewed 6737 times

: D+N Z-80 Back.jpg (1.4 MiB) Viewed 6734 times

I found a review of the board as PROXY-80 in the InfoWorld Mar 21, 1983 issue.
It uses CPM 2.2 and boots from standard IBM disks.
The board I have had the disk drive cable with it.
The paddle board was modified by cutting two traces and adding a jumper.
They basically cut separated clock and data and substituted raw read data.
The board has an Intel P8272 floppy disk controller chip on it.
So probably IBM format.
It is a serial input for the console.
It uses the same connector configuration for reset and serial input as the OSI-500 and the OSI-510 board.
The dip switches set the baud rate. Switch 7 selects 9600 baud.
I don't know all the monitor commands but found that D xxxx xxxx dumps memory to the screen.
The B command attempts to boot from the A drive after you hit enter.
The monitor is located from FC00 to FFFF in memory.
Any info you have on this board would be appreciated.

MONITOR ROM V1.1.TXT: (3.7 KiB) Downloaded 755 times

billdrom · Post by **billdrom** » Fri Jul 10, 2020 10:15 pm

Paddle board mod for D+N Z-80

: Paddle board mod for D+N - Z-80 board.jpg (474.63 KiB) Viewed 6732 times

billdrom · Post by **billdrom** » Sun Jul 12, 2020 4:41 am

D+N 106 I/O board provides a serial port for OSI using a UART chip.

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: 20200710_170724 (2).jpg (1.01 MiB) Viewed 6717 times

billdrom · Post by **billdrom** » Sun Jul 12, 2020 5:04 am

Floppy disk controller card made by Science Aztek Inc.
It is only half height compared to regular cards.
This card has an OSI standard 24 pin jack and a long ribbon cable that can be used instead.
I have no documentation for it.
It is operational using the standard OSI output and a set of OSI eight inch drives.
I did not get it working with the red ribbon cable yet.
There may be a jumper or some sort of configuration needed.

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: 20200710_170506 (2).jpg (1.21 MiB) Viewed 6716 times

billdrom · Post by **billdrom** » Sun Jul 19, 2020 12:31 am

D+N BIO-1600 Card

Description from D+N catalog:
The B10-1600 comes bare complete with documentation and MOLEX connectors.
The card combines many features into a single board supporting the following functions:
8K of Memory using 2114W type chips in 2 independent DIP SWITCH selectable
4K blocks. This memory may be used in any unused RAM memory section. An ideal use
is to expand ROM-based computers to their maximum BASIC workspace of 40K. two 16
BIT Parallel input/output ports. One port can be used as a Centronics Parallel printer,
the other as a Diablo Parallel printer port. Both ports may be used as experimenters
parallel l/O ports.
Five RS-232 ACIA serial l/O ports for use as serial printer ports or communication ports.
Supported by OSI software.