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Version numbers: Major 1, Minor 1.
Type | Name | Description |
Hardware options | ||
WORD | VADDR_MASK | Mask of the address bits valid when accessing the video memory |
WORD | VADDR_CHARSWITCH | If one bit in the video address is used to switch the character generator, it is masked here. |
WORD | VADDR_CHAROFFSET | The offset in characters in the character generator that CHARSWITCH switches. |
WORD | VADDR_REVSWITCH | If one bit in the video address inverts the screen, it is masked here. |
WORD | CHARGEN_MASK | size of character generator in byte - 1 |
WORD | CHARGEN_OFFSET | offset given by external circuitry |
BYTE | HW_CURSOR | external hardware cursor circuitry enabled |
BYTE | HW_COLS | number of displayed columns during one character clock cycle |
BYTE | HW_BLANK | set if the hardware blank feature is available |
CRTC register | ||
20 BYTE | REGISTERS | register DUMP of the CRTC registers 0-19. |
CRTC internal registers | ||
BYTE | REGNO | The current index in the CRTC register file |
BYTE | CHAR | The current cycle within the current rasterline |
BYTE | CHARLINE | The current character line |
BYTE | YCOUNTER | The current rasterline in the character |
BYTE | CRSRCNT | Framecounter for the blinking cursor |
BYTE | CRSRSTATE | if set the hardware cursor is visible |
BYTE | CRSRLINES | set if ycounter is within the active cursor rasterlines for a char |
WORD | CHARGEN_REL | relative base of currently used character generator in ROM (in byte) |
WORD | SCREEN_REL | screen address to load the counter at the beginning of the next rasterline |
WORD | VSYNC | number of rasterlines left within vsync; 0 = not in vsync |
BYTE | VENABLE | vertical enable flipflop; 1= display, 0= blank. |
(VICE-dependent?) variables | ||
WORD | SCREEN_WIDTH | width of the current display window |
WORD | SCREEN_HEIGHT | height of the current display window |
WORD | SCREEN_XOFFSET | x position where the first character in a line starts in the window… |
WORD | HJITTER | …but only after adding this jitter |
WORD | SCREEN_YOFFSET | x position where the first character in a line starts in the window… |
WORD | FRAMELINES | expected number of rasterlines for the current frame |
WORD | CURRENT_LINE | current rasterline as seen from the CRTC |
This value has been added in module version V1.1 | ||
BYTE | FLAG | Bit 0: If 1 then bit in VADDR_REVSWITCH must be set for reverse; if 0 then bit must be cleared for reverse. |
Here is the reference for the previous CRTC snapshot module. It is outdated and will not be read by this and later versions of VICE.
Version numbers: Major 0, Minor 0.
Type | Name | Description |
BYTE | RASTERY | The number of clock cycles from rasterlines start |
WORD | RASTERLINE | The current rasterline |
WORD | ADDRMASK | The address mask valid for the CRTC. All memory accesses are masked with this value |
BYTE | HWFLAG | Bit 0: 1= hardware cursor available. Bit 1: 1= number of columns is doubled by external hardware |
20 BYTE | REGISTERS | register DUMP of the CRTC registers 0-19. |
BYTE | CRSRSTATE | Hardware cursor: Bits 0-3: frame counter till next crsr line toggle. Bit 7: 1= cursor line active |
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