Serial Number 10-00131, a gift of Michael Barndt. The backplane in the Horizon is a little unusual. It contains the circuitry for two serial and two parallel ports. The serial ports were for the console terminal and a printer. The parallel ports could be used for printers or disk drives. It contains one Shugart Associates Model 400 hard-sector diskette drive, with room for a second. The PROM Monitor option is not installed Auto-Jump Address Selection = E800 Click on the image for a larger view. North Star MDC-A4 Single-Density Micro-Disk Controller Boot ROM @E800 Device A =A0, Device B=90 Click on the image for a larger view. North Star RAM16-A2 16k RAM 16k@4000-7FFF Click on the image for a larger view. Micromation Doubler, Double-Density 8" Diskette Controller Click on the image for a larger view. Godbout Econoram IV, 16k x 8 static RAM 16k@0000-3FFF | Click on the image for a larger view. The North Star Horizon with the wooden cover removed. Click on the image for a larger view. Notice the circuitry on the rear of the backplane. A Shugart Associated SA-400 Diskette Drive is installed at the right. North Star ZPB-A1 Z-80 Processor Board North Star MDC-A4 Single-Density Micro-Disk Controller Godbout Econoram VII, 24k RAM@8000 Cromemco TU_ART, two serial, two parallel North Star RAM 16-A2, 16k RAM@4000 Micromation Doubler, Double-Density 8" Diskette Controller Godbout Econoram IV, 16k RAM@0000 Ports start at address 00. The serial ports are configured for 9600 baud. The left serial is configured for:
The right serial is not implemented. The parallel port is configured for:
The Real Time Clock is not enabled. The Interrupt configuration is at the factory defaults, not enabled. |
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