BIOSF UPLOAD
The BIOSF_UPLOAD ($C00546) call copies data to the NeoGeo CD DRAM.
The parameters are:
BIOS_UPSRC ($10FEF8 ) (longword): Data source address
BIOS_UPDEST ($10FEF4 ) (longword): Data destination address
BIOS_UPSIZE ($10FEFC ) (longword): Data size
BIOS_UPZONE ($10FEDA ) (byte): Zone/method, see below
BIOS_UPBANK ($10FEDB ) (byte): DRAM bank
When the call returns, BIOS_UPDEST points to the end of the copied data, allowing multiple consecutive uploads without setting the destination address again.
Banks
Some DRAM zones have banks: SPR has 4 banks (each 1MiB), PCM has 2 banks (each 512KiB).
Zones/methods
$00: Copy PRG words (DMA)
Loads word copy DMA microcode.
$01: Copy Fix graphics bytes (DMA)
Loads byte copy DMA microcode. Dest = Dest + Size * 2.
$02: Copy Sprite graphics words (DMA)
Loads word copy DMA microcode. Copies over 1MiB are possible, the bank is incremented automatically.
$03: Copy Z80 program bytes (DMA)
Loads byte copy DMA microcode.
The destination address must be multiplied by 2 (8bit bus) ? Size doesn't have to be multiplied, but has to be an even number ?
$04: Copy PCM bytes (CPU)
Loads byte copy DMA microcode.
The destination address must be multiplied by 2 (8bit bus). Size doesn't have to be multiplied, but has to be an even number. Copies over 1MiB are possible, the bank is incremented automatically.
$05: Install PAT file
Notes:
- 10F736.l=((Bank*$10000)+Dest)/256
- 10F736+Address/2
$06: Copy palette words (DMA)
Loads word copy DMA microcode.
$07: Copy compressed sprite graphics (CPU)
The first longword's value indicates the size of the compressed data, BIOS_UPSIZE isn't used. When a longword zero is copied, the following longword indicates how many zero longwords to insert.
This method allows compression of large transparent zones. Is it ever used by games ?
$08: Copy PRG words (DMA)
Same as method $00.
$10: Copy PRG longwords (CPU)
Size must be a multiple of 4.
$11: Copy Fix graphics words (CPU)
The destination address must be multiplied by 2 (8bit bus). Size doesn't have to be multiplied, but has to be an even number.
$12: Copy Sprite graphics longwords (CPU)
Size must be a multiple of 4.
$13: Copy Z80 program bytes (CPU)
The destination address must be multiplied by 2 (8bit bus). Size doesn't have to be multiplied, but has to be an even number.
$14: Copy PCM bytes (CPU)
The destination address must be multiplied by 2 (8bit bus). Size doesn't have to be multiplied, but has to be an even number. Copies over 1MiB are possible, the bank is incremented automatically.
Difference with $04 ?
$15: Install PAT file
Same as method $05.
$16: Copy palette longwords (CPU)
Size must be a multiple of 4.
$17: Copy compressed sprite graphics (CPU)
Same as method $07.
$18: Copy PRG longwords (CPU)
Same as method $10.