Re: A86: Recalling string variables into programs with asm
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Re: A86: Recalling string variables into programs with asm
On Fri, 1 Aug 1997 MTNBIKE560@aol.com wrote:
> AStruct: .db $12,1,"A" ; $12 is type PRGM, 1 is name length
> BStruct: .db $0C,1,"B" ; $0C is type STRNG, 1 is name length
>
> be the way that it looks in the source code, or should l change it around?
Those two lines should work okay in the source code. The rest of that
message was just a gloss over what you need to do.
>
> lf it isn't real hard to put together l would like to learn how.
>
Attached is a CRUDE program I used to dump the TI-86 ROM in chunks.
Notice that I didn't use any of the page-independent routines like
INC_AHL (because I didn't know about them at the time, since I hadn't
dumped the ROM). The only reason this program did not obliterate the
system RAM was because I made sure that the variable I was using was
wholly contained in one page.
If you want, I can update this program to dump a whole page (16 KB)
at a time, safely, into an existing 16-KB string. That would be a
good learning experience for you, though.
--------
Dan Eble (mailto:eble@cis.ohio-state.edu)
(http://www.cis.ohio-state.edu/~eble)
#include "ti86asm.inc"
.org _asm_exec_ram
in a,(5)
ld (Port5Save),a
ld hl, Struct_0 ; hl -> structure
ld de, $6000 ; de -> memory to dump
call StrDump
ld a,(Port5Save)
out (5),a
ret
Port5Save: .db $0
;컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴
; Dump the memory in the picture
;컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴
StrDump:
push de
rst 20H ; copy struct to buffer
rst 10H ; find variable
; ret c ; cf set = failure
ex de,hl
ld a,b
call $462F ; translate linear address into page address
; and switch RAM page
ex de,hl
pop hl ; hl -> memory to dump
inc de
inc de ; de -> variable
ld bc, $2000
in a,(5)
and $F0
or $0E
out (5),a
ldir
ret
;컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴
; Variable Structures
;컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴
Struct_0: .db $0C,7,"DUMPSTR"
.end
References: