Mercurial > hg > Members > kono > nitros9-code
changeset 1171:03deef228bee
ROM modules now placed in cloud9
| author | boisy |
|---|---|
| date | Mon, 19 May 2003 11:57:55 +0000 |
| parents | ca963a4eb55a |
| children | 5b3671305159 |
| files | 3rdparty/booters/boot_rom.asm 3rdparty/booters/boot_rom_l1.asm |
| diffstat | 2 files changed, 0 insertions(+), 213 deletions(-) [+] |
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--- a/3rdparty/booters/boot_rom.asm Mon May 19 11:57:19 2003 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,153 +0,0 @@ -******************************************************************** -* Boot - OS-9 Level Two ROM Boot Module -* -* $Id$ -* -* Ed. Comments Who YY/MM/DD -* ------------------------------------------------------------------ -* 1 Created BGP 98/??/?? - - nam Boot - ttl OS-9 Level Two ROM Boot Module - - ifp1 - use defsfile - endc - -tylg set Systm+Objct -atrv set ReEnt+rev -rev set $01 -edition set 1 - - mod eom,name,tylg,atrv,start,size - -size equ . - -name fcs /Boot/ - fcb edition - -start equ * -* obtain bootfile size at known offset - pshs u,y,x,a,b,cc - orcc #IntMasks mask interrupts - -* allocate memory from system -* memory will start at $8000, blocks 1, 2, 3 and 3F -* we allocate $100 bytes more so that the memory will start -* exactly at $8000 - ldd #$8000-$1300 - os9 F$BtMem - bcs Uhoh - - stu 3,s save pointer in X on stack - std 1,s save size in D on stack - -* TRICK! Map block 4 into $4000, copy our special ROM copy code -* there, then jmp to it! - lda $FFA2 - pshs a - lda #$04 - sta $FFA2 - ldd #RelCodeL code less than 256 bytes - leax RelCode,pcr - ldy #$4800 -Copy lda ,x+ - sta ,y+ - decb - bne Copy - -Jump jsr $4800 * jump to rel code - puls a restore original block at $4000 - sta $FFA2 - -* Upon exit, we return to the kernel with: -* X = address of bootfile -* D = size of bootfile -* CC = carry cleared -ExitOK andcc #^Carry clear carry -Uhoh puls u,y,x,a,b,cc,pc - - -* this code executes at $4800 -RelCode equ * - lda #$4E CC3 mode, MMU, 32K ROM - sta $FF90 - sta $FFDE ROM/RAM mode - -* Map ROM Blocks in - ldd #$3C3D - std $FFA4 - lda #$3E - sta $FFA6 - -* Map block 1 at $6000 - lda $FFA3 - pshs a - lda #$01 - sta $FFA3 -* Copy first 8K of ROM - ldx #$8000 - ldy #$6000 -Loop1 ldd ,x++ - std ,y++ - cmpx #$A000 - blt Loop1 - -* Map block 2 at $6000 - lda #$02 - sta $FFA3 -* Copy second 8K of ROM - ldx #$A000 - ldy #$6000 -Loop2 ldd ,x++ - std ,y++ - cmpx #$C000 - blt Loop2 - -* Map block 3 at $6000 - lda #$03 - sta $FFA3 -* Copy third 8K of ROM - ldx #$C000 - ldy #$6000 -Loop3 ldd ,x++ - std ,y++ - cmpx #$E000 - blt Loop3 - -* Copy remaining ROM area ($8000-$1400) - lda #$3F - sta $FFA3 - ldx #$E000 - ldy #$6000 -Loop4 clr $FFDE put in ROM/RAM mode to get byte - ldd ,x++ - clr $FFDF put back in RAM mode to store byte - std ,y++ - cmpx #$EC00 - blt Loop4 -* ldx #$6000 -* ldy #$E000 -*Loop5 ldd ,x++ -* std ,y++ -* cmpx #$6C00 -* blt Loop5 - - lda D.HINIT restore GIME HINIT value - sta $FF90 - puls a restore org block at $6000 - sta $FFA3 - lda #$03 - sta $FFA6 - ldd #$0102 - std $FFA4 - rts - -RelCodeL equ *-RelCode - -* Fillers to get to $1D0 -Pad fill $39,$1D0-3-* - - emod -eom equ * - end
--- a/3rdparty/booters/boot_rom_l1.asm Mon May 19 11:57:19 2003 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,60 +0,0 @@ -******************************************************************** -* Boot - OS-9 Level One V2 ROM Boot Module -* -* $Id$ -* -* Ed. Comments Who YY/MM/DD -* ------------------------------------------------------------------ -* 1 Tandy/Microware original version - - nam Boot - ttl OS-9 Level One V2 ROM Boot Module - - ifp1 - use defsfile - endc - -tylg set Systm+Objct -atrv set ReEnt+rev -rev set $01 -edition set 1 - - mod eom,name,tylg,atrv,start,size - -u0000 rmb 2 -u0002 rmb 2 -u0004 rmb 1 -size equ . - -name fcs /Boot/ - fcb edition - - -* obtain bootfile size at known offset -start pshs u,y,x,a,b - leax eom,pcr point to end of module - ldd ,x get size of bootfile - std ,s place bootfile size in A/B on stack -* allocate memory from system - os9 F$SRqMem - bcs Uhoh -* copy bootfile from low RAM to allocated area - stu 2,s place address in X loc. on stack - ldx #$2600+$1200 X points to bootfile in ROM - ldd ,s get bootfile size from A/B on stack -Loop ldy ,x++ - sty ,u++ - subd #2 - bgt Loop - -* Upon exit, we return to the kernel with: -* X = address of bootfile -* D = size of bootfile -Uhoh puls u,y,x,a,b,pc - - emod -eom equ * - -* Size of bootfile (maximum is put here) - fdb $2E00 - end