Wikifang:Telefang 1 Translation Patch/RAM map
| Location | Length | Symbolic name | Purpose | Typical values | Added in patch? |
|---|---|---|---|---|---|
| C3C2 | 1 | Regstor_SCX | Shadow register | No | |
| C3C3 | 1 | Regstor_SCY | Shadow register | No | |
| C3C4 | 1 | Regstor_WX | Shadow register | No | |
| C3C5 | 1 | Regstor_WY | Shadow register | No | |
| C3C6 | 1 | Regstor_BGP | Shadow register | No | |
| C3C7 | 1 | Regstor_OBP0 | Shadow register | No | |
| C3C8 | 1 | Regstor_OBP1 | Shadow register | No | |
| C3C9 | 1 | Regstor_LCDC | Shadow register | No | |
| C3CA | 1 | Regstor_LYC | Shadow register | No | |
| These are registers to hold the values of things that need to be modified at Vblank time, either because they can't be touched during render time or because it makes more sense for it to be touched there.
Every Gameboy project will have at least one of these kinds of locations, since it's the only safe (non hardware-damaging) way to turn off the LCD. | |||||
| C3E0 | 1 | SystemState | Game state table index | No | |
| C3E1 | 1 | SystemSubState | Game state table index | No | |
| C3E2 | 1 | SystemSubSubState | Game state table index | No | |
| Per-frame functions are managed with state machines throughout Telefang, especially the main gameloop. There are three State bytes, because there can be up to three levels of state machines to reach a particular per-frame function.
Please note that this is not the only state machine in Telefang, though it is the largest. | |||||
| C3E8 | 1 | GameboyType | Internal hardware detection | 01 (DMG), 11 (MGB), FF (CGB) | No |
| This is another "every project has one" location. It is the contents of the A register on startup, which can be used to distinguish between operation on a DMG (brick) gameboy, MGB (pocket) gameboy, or Gameboy Color. This is needed to determine if CGB features are available.
This does NOT tell you if you're on a Super Gameboy, that's different. | |||||
| C423 | 1 | SPILL_TempBank | Returning to previous banks | No | |
| C425 | 1 | CurrentBank | Bankswitching | No | |
These variables are in use for managing bankswitching. There are two RST routines available for using these values:
| |||||
| C7C1 | 1 | VWF_CurrentLetter | Text rendering | Yes | |
| This stores the current letter being rendered in the VWF routines. | |||||
| C7C2 | 1 | VWF_LetterShift | Text rendering | Yes | |
| This stores the current Y pixel location of in-progress text renders, modulo 8.
It's used specifically to track how many shifts are needed when drawing text in the VWF routine. | |||||
| C7C3 | 2 | VWF_CompositeArea | Text rendering | $D0CF | Not sure |
| Pointer to the compositing area used to store in-progress text rendering.
I am not sure if the compositing area is used in the original game. | |||||
| C7C5 | 1 | VWF_OldTileMode | Text rendering | 0, 1, 2 | Yes |
| Internal VWF bookkeeping variable used to manage the contents of the compositing area.
When 0, the current drawing progress has not yet crossed a tile boundary, and the compositing area is drawn to freely. When 1, the current drawing progress has crossed a tile boundary, and the compositing area is globally moved left by one tile during drawing so that drawing can continue. State 2 is never set by the VWF itself, only other code. It indicates that a newline or other disruption in normal text flow has occured and thus the entire contents of the compositing area should be treated as garbage. | |||||
| C7C6 | 1 | VWF_MainScriptHack | Text rendering | 0, 1 | Yes |
| This is a boolean value historically (in terms of the patch) used to track the main script state and enable some hacks which made newlines work properly. Most of the reason for this value's existence has been moved away since the main script was later hacked to properly manage it's own tiles in the face of a VWF. | |||||