Apple-2-SW/prodos-drivers
1
0
Fork 0
mirror of https://github.com/a2stuff/prodos-drivers.git synced 2025-01-08 08:29:57 +00:00
Code Issues Projects Releases Wiki Activity

Consolidate installer

Browse Source
This commit is contained in:
Joshua Bell 2017-12-12 20:56:51 -08:00
parent c11c49a03b
commit b064242a7a
1 changed files with 62 additions and 79 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

141
buhbye.system.s
View File

@ -73,18 +73,72 @@ ASCII_ESCAPE := $1B
;;; area is Apple's dispatcher code.
;;; ------------------------------------------------------------
;;; Entry point
;;; Installer
;;; ------------------------------------------------------------
;; Loads at $2000 but executed at $1000.
.org $2000
jmp install_and_quit
install_src := *
install_size := $300 ; must fit in $D100...$D3FF = $300
padded_size := $400 ; but some struct members can spill past end
.proc install
src := install_src
end := install_src + install_size
dst := $D100 ; Install location in ProDOS (bank 2)
src_ptr := $19
dst_ptr := $1B
sta ALTZPOFF
lda ROMIN ; write bank 2
lda ROMIN
lda #<src ; src_ptr = src
sta src_ptr
lda #>src
sta src_ptr+1
lda #<dst ; dst_ptr = dst
sta dst_ptr
lda #>dst
sta dst_ptr+1
loop: lda (src_ptr) ; *src_ptr = *dst_ptr
sta (dst_ptr)
inc src_ptr ; src_ptr++
bne :+
inc src_ptr+1
: inc dst_ptr ; dst_ptr++
bne :+
inc dst_ptr+1
: lda src_ptr+1 ; src_ptr == end ?
cmp #>end
bne loop
lda src_ptr
cmp #<end
bne loop
sta ALTZPOFF
sta ROMINWB1
sta ROMINWB1
;; fall through
.endproc
.proc quit
MLI_CALL QUIT, params
.proc params
params: .byte 4
type: .byte 0
res1: .word 0
res2: .byte 0
res3: .addr 0
.endproc
.endproc
install_src := *
;;; ------------------------------------------------------------
;;; Selector
@ -93,7 +147,7 @@ ASCII_ESCAPE := $1B
.org $1000
.proc selector
prefix := $280 ; length-prefixed
prefix := $280 ; length-prefixed
filenames := $1400 ; each is length + 15 bytes
read_buffer := $2000 ; Also, start location for launched SYS files
@ -689,75 +743,4 @@ trans: .word 0
.assert read_params::request - selector <= install_size, error, "Must fit in $300 bytes"
.res ($1000 + $400) - *, 0 ; (selector + install_size) - *
.endproc
.assert .sizeof(selector) = padded_size, error, "Expected size is $400"
;;; ------------------------------------------------------------
;;; Installer
;;; ------------------------------------------------------------
.org $2403 ; $2000 + JMP to here
.proc install_and_quit
jsr install
MLI_CALL QUIT, params
.proc params
params: .byte 4
type: .byte 0
res1: .word 0
res2: .byte 0
res3: .addr 0
.endproc
.endproc
;;; ------------------------------------------------------------
.proc install
src := install_src
end := install_src + install_size
dst := $D100 ; Install location in ProDOS (bank 2)
src_ptr := $19
dst_ptr := $1B
sta ALTZPOFF
lda ROMIN ; write bank 2
lda ROMIN
lda #>src
sta src_ptr+1
lda #<src
sta src_ptr
lda #>dst
sta dst_ptr+1
lda #<dst
sta dst_ptr
loop: lda (src_ptr)
sta (dst_ptr)
inc src_ptr ; src_ptr++
bne :+
inc src_ptr+1
: inc dst_ptr ; dst_ptr++
bne :+
inc dst_ptr+1
: lda src_ptr+1 ;
cmp #>end
bne loop
lda src_ptr
cmp #<end
bne loop
sta ALTZPOFF
sta ROMINWB1
sta ROMINWB1
rts
.endproc