Tom's blog

A blog about some custom developments and experiences...

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Processor

Delicatessen 2

I do have some basics of electronic logic and gates, but that’s not enough to fully enjoy this picture… The only thing I would guess from it, is that the upper right ‘banks’ sounds to be data register related (8… Continue Reading →

Delicatessen

I recently bought these chips: – 1 x 68000 CPU DIP – 1 x WD1770/1772/1773 FDC DIP – 1 x AY-3-8910/YM2149F SOUND CHIP – 1 x MC68901P DIP – 2 x MC68B50 DIP These were the chips used in the… Continue Reading →

68000: #$4E71 > NOP

It happened that I was sometimes reversing/editing/updating existing programs. One reason was: the program had some copy protection, I was not having the money to get it (as a kid) and I had to give it back to a friend…. Continue Reading →

68000: MOVEQ, ADDQ, SUBQ

Nowadays it is quite easy to find any kind of information on the internet. But when I was a kid it was a mission to get valid information. You could go to the library – at first – but as… Continue Reading →

Work in progress…

I had little time available for my own projects these days. But that doesn’t mean it isn’t in my head/heart… When the time allowed, I mainly worked on my 6502 debugger for Mac: D65… What I do is – when… Continue Reading →

WOZ

As I was looking for feeding my debugger with some 65xx binaries, sample programs, etc. to play with it and test its capabilities… I ended up in reading some work Steve Wozniak did for the Apple I/II :   *… Continue Reading →

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