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Tag: c9
4 items with this tag.
16 May 2026
6845 CRTC Internal Counters (C0/C4/C9/C5)
crtc
6845
internal-state
c0
c4
c9
c5
vma
last-line
additional-management
16 May 2026
ACCC — The Amstrad CPC CRTC Compendium (v1.7)
crtc
6845
reference
rupture
cpc
internal-counters
c0
c4
c9
c5
vma
vsync
hsync
16 May 2026
CRTC Counter Freeze (R0=0)
crtc
r0
freeze
counters
experimental
raster
c9
c4
16 May 2026
RVI (per-line C9 selection via R0=1 micro-cycles)
crtc
rupture
rvi
r0
c9
single-scanline
last-line
hsync