Incorporate GEOS 128 - Githubissues

mist64 / geos

Source code of GEOS 2.0 for the Commodore 64 and 128

414 stars 66 forks source link

Incorporate GEOS 128 #3

Closed mist64 closed 7 years ago

mist64 commented 7 years ago

BSW's C128 version of GEOS 2.0 adds the following features compared to GEOS 64:

Support for the VDC graphics chip.
- VIC and VDC can be switched at runtime, drawing commands check for currently active one.
- 640x200 resolution
- software sprite support in VDC mode
Larger KERNAL is spread across two 64 KB banks, sophisticated bank switching logic is used.
13 new KERNAL calls
Burst mode disk driver for 1571/1581
Several improvements and bug fixes in generic code.

Incorporating the GEOS 128 code into this source will allow us to

create improved versions of GEOS 128
use the bug fixes and improvements other versions like the C64 one
reuse some of the features for other machines with different graphics hardware or multiple graphics modes (and more than ~128+ KB of RAM)

mist64 commented 7 years ago

Fixed by fd4d73a.