Commodore s Assemblers: Part 4: HCD65 – pagetable com pagetable.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from pagetable.com Daily Mail and Mail on Sunday newspapers.
BSO CR6502/11 (VAX)
In mid-1984, Commodore switched to “CR6502/11” by the company Boston Systems Office (BSO), a cross-assembler running on VAX/VMS systems that was highly compatible to the MOS assemblers, but more advanced.
Read more: Commodore’s Assemblers: Part 3: BSO [coming soon]
HCD65 (C128)
In 1986, Commodore wrote a new assembler named “HCD65” for the C128 that aimed at full compatibility with the BSO assembler. They sold it as part of the Commodore 128 Developer’s Package in 1987. In 1989, as Commodore worked on the ill-fated C65, they added support for the extended 65CE02/4510 instruction set.
Read more: Commodore’s Assemblers: Part 4: HCD65 [coming soon]
4) Change the memory map, to take advantage of the RAM capacity of the MEGA65 5) Exchange awkward code, that was necessary due to a bad bank switching design 6) Optimise existing code: faster and shorter alogrithms 7) Use the hardware multiplication and divison unit of the MEGA65
8) Implement convenient features, like the DOS wedge It would be nearly impossible to work on these tasks without the original source codes as a starting point, but thanks to Bo Zimmerman, who probably hosts the largest arvchive of CBM related technical information, ROM images and software, I could find the necessary source files of Dennis Jarvis, one of the former C65 developers.