Author Archives: jonno

SH101 style sequencer as ruby UniMIDI script

I came across a youtube video which shows an Axoloti set up to emulate an SH101 style sequencer being trigged by an incoming note. I had not seen this style of sequencer before, and was interested in the patterns that can … Continue reading

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Applesoft Disassembly

I went looking for a disassembly of Applesoft. The best one I found was the S-C DocuMentor Applesoft listing which has meaningful labels and comments, but was a little cumbersome to peruse as it was spread over multiple files and lacked … Continue reading

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ip65 project page recovered

The ip65 project page ( seems to have dropped off the interwebs. It is back now.

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Kipper BASIC updates

Goog from reported a couple of bugs in Kipper BASIC which I have fixed in version 1.21 The bugs were Any UDP broadcast anywhere on the LAN (say, a DHCP client booting up, or the  ‘Host Announcements’ every Windows … Continue reading

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peekbot is back

I’ve turned on peekbot again, although I have disabled the ‘screendump’ feature (which would render a text file using the default font and screen colours from whatever system the text file appeared to originate from) – I think this was … Continue reading

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More classic computer footage from the MIT Vault

I’ve been poking around some more in the film archive at MIT that I found “Making Electrons Count” and a few other items caught my attention. First is a news report from 1951 showing the WHIRLWIND computer being used to … Continue reading

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Ancient I/O & Making Electrons Count

The RPC-4000 (like many computers of the same vintage) used a device called a Friden Flexowriter for input and output. This device was a combination typewriter, printer and paper tape reader & writer. Input to the RPC-4000 could be done … Continue reading

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On the trail of a Real Programmer

Coders of a certain vintage will be familiar with the story of Mel, the Real Programmer in which Ed Nather (writing in 1983) relates his experience from 20 years previously in attempting to patch a BlackJack program written by his … Continue reading

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copy of Acorn MOS annotated disassembly

These were zipped at The BBC Lives! The BBC Micro Operating System ( a series that first published on Micronet between April and October 1991 ) Acorn MOS 1.2 Disassembly part 1 (VDU fonts & contstants : $C000 – $C4BF) … Continue reading

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peekbot update

I added some new decoders to peekbot DFS filesystem as used by 8-bit Acorn machines, e.g the “BBC Model B” my school used (sample) BBC BASIC (sample) “Micro Painter” picture format for 8-bit Atari (sample) Also, the symbols table used … Continue reading

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