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  1. Hi, welcome to my visitor page. I have been collecting vintage computers since around 2000, mainly HP Series 80, HP Portable (an early laptop), BBC Master and IBM PC & AT. Lately I have got an Apple II Europlus running, and have several ongoing repair 'projects' (sometimes more of a wishlist!) including Microwriters, Transam Tuscan, SWTPC 6800 and a Commodore 128.
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About 1980s_john

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About 1980s_john


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December 29th, 2011 01:27 PM
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April 29th, 2005
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Installing and running Kermit under CP/M on a Northstar Advantage

by 1980s_john on December 27th, 2014 at 01:03 PM

Following are my notes explaining how to install Kermit from scratch, using a PC running Windows.

The Advantage must have a serial (or SIO) board fitted, set up with the default DIL configuration headers (one sets port as a modem, other sets async mode).

The Advantage has 6 slots for I/O boards, numbered from 1 (nearest to floppy) to 6. The default assignments in Advantage CP/M for serial devices are:

LST: - board in slot 1, 9600 baud

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Updated December 27th, 2014 at 02:50 PM by 1980s_john (Added Set Binary mode)


Microwriter MW4 notes

by 1980s_john on November 2nd, 2011 at 04:20 PM
I'm in the process of working on three of these, bought over a couple years on eBay. There is a description of the MW4 on the Wiki page, which I will add to once I have made enough progress.

First thing was none of the units came with power supplies, they run off 4 NiCd cells (20mm x 40mm each), via a drop down resistor. I am using a 9V regulated supply, and later on will try out some unregulated ones. Once charged the NiCds hold the voltage to around 5.6V (4 x 1.4V).

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