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RetroLoader128 V0.5   [2021]

RetroLoader128 V0.5 Released by :
Retrocomputacion [web]

Release Date :
29 August 2021

Type :
C128 Release


Website :

User rating:awaiting 8 votes (6 left)   See votestatistics

Credits :
Code .... Pastbytes of Retrocomputacion
Design .... Pastbytes of Retrocomputacion
Idea .... Pastbytes of Retrocomputacion

Download :
http://csdb.dk/getinternalfile.php/217539/retroloader0.5.zip (downloads: 73)

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Production Info
Submitted by pastbytes on 5 September 2021
Once a PRG is selected, it is loaded into bank 1 at the same address as it would be in C64 mode. This avoids conflicts due to differences between the memory maps of the C64 and C128 modes. The maximum size that a PRG can have is almost 62K, since it is loaded into a memory bank where there is only RAM, so there are no conflicts with ROMs and I/O.
Once the PRG is loaded, a routine is copied to the C64-mode cassette buffer ($033C). This is a point of no return to C128 mode, since it destroys the system variables.
The code in $033C copies the PRG from bank 1 to bank 0 (overwriting the browser code), configures the MMU to go to C64 mode without transferring control to the system, configures the system variables to "simulate" that we just finished loading a program using LOAD on a newly initialized C64, it places 'RUN' + RETURN into the keyboard buffer, and transfers control to BASIC 2.0.
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CSDb (Commodore 64 Scene Database) is a website which goal is to gather as much information and material about the scene around the commodore 64 computer - the worlds most popular home computer throughout time. Here you can find almost anything which was ever made for the commodore 64, and more is being added every day. As this website is scene related, you can mostly find demos, music and graphics made by the people who made the scene (the sceners), but you can also find a lot of the old classic games here. Try out the search box in the top right corner, or check out the CSDb main page for the latest additions.
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