CURS_X = $30
CURS_Y = $31
SCREEN_PTR = $32 ;2
-CRAM_PTR = $34 ;2
-CHARCOLOR = $36
-RVS = $37
-BGCOLOR = $38
-tickcount = $39 ;4
+CHARCOLOR = $34
+RVS = $35
+BGCOLOR = $36
+tickcount = $37 ;4
; FIXME: screen dimensions my change according to selected video mode
screenrows = (224/8)
PSG = $0800 ; base
+PSG_CHAN_SELECT = $0800
+PSG_GLOBAL_PAN = $0801
+PSG_FREQ_LO = $0802
+PSG_FREQ_HI = $0803
+PSG_CHAN_CTRL = $0804
+PSG_CHAN_PAN = $0805
+PSG_CHAN_DATA = $0806
+PSG_NOISE = $0807
+PSG_LFO_FREQ = $0808
+PSG_LFO_CTRL = $0809
+
; timer
TIMER = $0c00 ; base