KIM Kenner 19 Patches op Basic Hans Otten, translated by Hans Otten, 20211
May 1981 Byte Magzine had an article in System Notes, Faster Basic for Ohio Scientific.
The article described how the first batch of the 6502 had a faulty ROR instruction, so the programmers of Microsoft Basic had to work around this missing instruction with a slower replacement, (Note 2021: this is well explained in the Pagetable MS Basic articles) and how to patch this to really use the ROR instruction and speed up things.
A letter to the editor in a later Byte (September 1981?) showed the patches required for the KB9 KIM-1 version.
Location $37DE to $3801 and $38D2 to $3903 are now unused.
This patch may speed up KB9 quite a bit for number crunching.
See also:
Elektor 6502 clock
In 1981 and 1982 the magazine Elektor (Elektuur) published a small 6502 system. Small since it only contained a 6502, a ...
In 1981 and 1982 the magazine Elektor (Elektuur) published a small 6502 system. Small since it only contained a 6502, a ...
6530-004 dissected
This page about the 6530-004 dissection is about a transistor level dissection of the 6530-004 (TIM edition), brough...
This page about the 6530-004 dissection is about a transistor level dissection of the 6530-004 (TIM edition), brough...
Baseball
Another KIM-1 game by Robert Leedom. https://www.youtube.com/watch?v=gssTtSw22BA Thanks to Nils for providing this...
Another KIM-1 game by Robert Leedom. https://www.youtube.com/watch?v=gssTtSw22BA Thanks to Nils for providing this...
KIM Venture
A Colossal Cave Adventure on a KIM-1? Yes, within the limits of the seven segments LED, and the 1K RAM? The late-70s la...
A Colossal Cave Adventure on a KIM-1? Yes, within the limits of the seven segments LED, and the 1K RAM? The late-70s la...