mirror of https://github.com/mgcaret/romex.git
72 lines
2.2 KiB
Plaintext
72 lines
2.2 KiB
Plaintext
; macros
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; use at beginning of patch, set maxsize=0 for no max size check
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.macro rompatch addr,maxsize,desc
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patchstart = addr
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.org patchstart
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patchmsize = maxsize
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.define patchdesc desc
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.if patchmsize > 0
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.out .sprintf(" ROM patch %s bgn %x, max size %d", patchdesc, patchstart, patchmsize)
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.else
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.out .sprintf(" ROM patch %s bgn %x, max size unconstrained", patchdesc, patchstart)
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.endif
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.endmacro
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; use at end of patch, displays info about the patch
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; and checks for over-size patch
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.macro endpatch
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.if patchmsize > 0
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.out .sprintf(" ROM patch %s end %x; size: %d of %d, %d left", patchdesc, *-1, *-patchstart, patchmsize, patchmsize-*+patchstart)
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.assert * <= (patchstart+patchmsize), error, .sprintf(" ROM patch %s code too big", patchdesc)
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.else
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.out .sprintf(" ROM patch %s end %x; size: %d", patchdesc, *-1, *-patchstart)
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.endif
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.endmacro
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; hardware
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;set80col = $c001
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setslotcxrom = $c006
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setintcxrom = $c007
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setaltchar = $c00f
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butn0 = $c061
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butn1 = $c062
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kbd = $c000
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kbdstrb = $c010
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romin = $c081
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; ZP locations
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ch = $24 ; cursor horizontal pos
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cv = $25
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; locations
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softev = $3f2
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pwerdup = $3f4
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ampervec = $3f5
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; values
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pwrbyte = $a5
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menucol = 10 ; column for menu entries
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; entries
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init = $fb2f ; init text screen
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tabv = $fb5b ; vtab to a-reg
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vtab = $fc22 ; vtab to cv
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sloop = $faba ; slot scan loop
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title = $fb60 ; clear screen, display "Apple //e"
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kbdwait = $fb88 ; wait for keyboard input, print char
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bell1 = $fbdd ; beep
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wait = $fca8 ; waste time
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rdkey = $fd0c ; read keyboard
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cout = $fded ; character out
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setkbd = $fe89 ; set keyboard as input
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setvid = $fe93 ; set text screen as output
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rdchar = $fd35 ; rdchar, used for delete key patch
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prhex = $fde3 ; x,y preserved
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prbyte = $fdda ; x,y preserved
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monitor = $ff59 ; monitor
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intcxrts = $f8cb ; switch in internal cx ROM and rts
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slotcxrts = $fec5 ; switch in slot cx ROM and rts
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