the10thwiz/cc65
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add support for 48x12 video mode on Challenger 1P.

Browse Source 
Tested on real C1P hardware.
This commit is contained in:
Jeff Tranter
2023-05-05 18:02:42 -04:00
parent a325c95652
commit 17706208e8
2 changed files with 29 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
libsrc/osic1p/extra/screen-c1p-48x12.s Normal file
View File

@@ -0,0 +1,16 @@
;
; Implementation of screen-layout related functions for Challenger 1P in 48x12 mode.
;
.include "../osiscreen.inc"
C1P_SCR_BASE := $D000 ; Base of C1P video RAM
C1P_VRAM_SIZE = $0400 ; Size of C1P video RAM (1 kB)
C1P_SCR_WIDTH = $30 ; Screen width
C1P_SCR_HEIGHT = $0C ; Screen height
C1P_SCR_FIRSTCHAR = $8B ; Offset of cursor position (0, 0) from base
; of video RAM
C1P_SCROLL_DIST = $40 ; Memory distance for scrolling by one line
osi_screen_funcs C1P_SCR_BASE, C1P_VRAM_SIZE, C1P_SCR_FIRSTCHAR, \
C1P_SCR_WIDTH, C1P_SCR_HEIGHT, C1P_SCROLL_DIST