diff options
Diffstat (limited to 'hram.asm')
| -rw-r--r-- | hram.asm | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/hram.asm b/hram.asm new file mode 100644 index 00000000..6f807c90 --- /dev/null +++ b/hram.asm @@ -0,0 +1,116 @@ + +H_SPRITEWIDTH EQU $FF8B ; in bytes +H_SPRITEINTERLACECOUNTER EQU $FF8B +H_SPRITEHEIGHT EQU $FF8C ; in bytes +H_SPRITEOFFSET EQU $FF8D + +H_SOFTRESETCOUNTER EQU $FF8A ; initialized to 16, decremented each input iteration if the user presses the reset sequence (A+B+S+s). Soft reset when 0 is reached. + +; counters for blinking down arrow +H_DOWNARROWBLINKCNT1 EQU $FF8B +H_DOWNARROWBLINKCNT2 EQU $FF8C + +; Note: the following multiplication and division addresses are used for multiple purposes +; and so they overlap with each other + +H_MULTIPLICAND EQU $FF96 ; 3 bytes, big endian order +H_MULTIPLIER EQU $FF99 ; 1 byte +H_PRODUCT EQU $FF95 ; 4 bytes, big endian order + +H_DIVIDEND EQU $FF95 ; 4 bytes, big endian order +H_DIVISOR EQU $FF99 ; 1 byte +H_QUOTIENT EQU $FF95 ; 4 bytes, big endian order +H_REMAINDER EQU $FF99 ; 1 byte + +; used to convert numbers to decimal +H_PASTLEADINGZEROES EQU $FF95 ; flag to indicate that a nonzero digit has been printed +H_NUMTOPRINT EQU $FF96 ; 3 bytes, big endian order +H_POWEROFTEN EQU $FF99 ; 3 bytes, big endian order +H_SAVEDNUMTOPRINT EQU $FF9C ; 3 bytes, big endian order (to back out of a subtraction) + +H_OLDPRESSEDBUTTONS EQU $FFB1 +H_NEWLYRELEASEDBUTTONS EQU $FFB2 +H_NEWLYPRESSEDBUTTONS EQU $FFB3 +H_CURRENTPRESSEDBUTTONS EQU $FFB4 + +H_LOADEDROMBANK EQU $FFB8 + +; is automatic background transfer during V-blank enabled? +; if nonzero, yes +; if zero, no +H_AUTOBGTRANSFERENABLED EQU $FFBA + +TRANSFERTOP EQU 0 +TRANSFERMIDDLE EQU 1 +TRANSFERBOTTOM EQU 2 + +; 00 = top third of background +; 01 = middle third of background +; 02 = bottom third of background +H_AUTOBGTRANSFERPORTION EQU $FFBB + +; the destination address of the automatic background transfer +H_AUTOBGTRANSFERDEST EQU $FFBC ; 2 bytes + +; temporary storage for stack pointer during memory transfers that use pop +; to increase speed +H_SPTEMP EQU $FFBF ; 2 bytes + +; source address for VBlankCopyBgMap function +; the first byte doubles as the byte that enabled the transfer. +; if it is 0, the transfer is disabled +; if it is not 0, the transfer is enabled +; this means that XX00 is not a valid source address +H_VBCOPYBGSRC EQU $FFC1 ; 2 bytes + +; destination address for VBlankCopyBgMap function +H_VBCOPYBGDEST EQU $FFC3 ; 2 bytes + +; number of rows for VBlankCopyBgMap to copy +H_VBCOPYBGNUMROWS EQU $FFC5 + +; size of VBlankCopy transfer in 16-byte units +H_VBCOPYSIZE EQU $FFC6 + +; source address for VBlankCopy function +H_VBCOPYSRC EQU $FFC7 + +; destination address for VBlankCopy function +H_VBCOPYDEST EQU $FFC9 + +; size of source data for VBlankCopyDouble in 8-byte units +H_VBCOPYDOUBLESIZE EQU $FFCB + +; source address for VBlankCopyDouble function +H_VBCOPYDOUBLESRC EQU $FFCC + +; destination address for VBlankCopyDouble function +H_VBCOPYDOUBLEDEST EQU $FFCE + +; controls whether a row or column of 2x2 tile blocks is redrawn in V-blank +; 00 = no redraw +; 01 = redraw column +; 02 = redraw row +H_SCREENEDGEREDRAW EQU $FFD0 + +REDRAWCOL EQU 1 +REDRAWROW EQU 2 + +H_SCREENEDGEREDRAWADDR EQU $FFD1 + +H_RAND1 EQU $FFD3 +H_RAND2 EQU $FFD4 + +H_FRAMECOUNTER EQU $FFD5 ; decremented every V-blank (used for delays) + +; V-blank sets this to 0 each time it runs. +; So, by setting it to a nonzero value and waiting for it to become 0 again, +; you can detect that the V-blank handler has run since then. +H_VBLANKOCCURRED EQU $FFD6 + +H_CURRENTSPRITEOFFSET EQU $FFDA ; multiple of $10 + +H_WHOSETURN EQU $FFF3 ; 0 on player’s turn, 1 on enemy’s turn + +H_JOYPADSTATE EQU $FFF8 + |