MMC Replay Programmers Manual
*************************************
* MMC64 Hardware Specification V1.2 *
* (C) 2005 by Oliver Achten *
*************************************
Memory map
----------
$8000 - $9fff MMC64 BIOS rom (*)(**)
(*) Rom is active when bit 0 of $DF11 and the flash jumper is not set
(**) Rom is write enabled when bit 4 of $DF11 is set
I/O map
-------
$DE01 / $DF21(W)(*): bit 0: 0 = disable clock port, 1 = enable clockport
$DE02-$DE0F / $DF22-$DF2F (R/W)(*): clock port I/O area
(*) location depends on bit 3 of $DF11
$DF10 (R/W): MMC64 SPI transfer register
---------------------------
byte written is sent to the card & response from the card is read here
$DF11 (R/W): MMC64 control register
----------------------
bit 0: 0 = MMC64 BIOS active, 1 = external ROM active
bit 1: 0 = card selected, 1 = card not selected
bit 2: 0 = 250khz transfer, 1 = 8mhz transfer
bit 3: 0 = clock port @ $DE00, 1 = clock port @ $DF20
bit 4: 0 = normal Operation, 1 = flash mode (*)
bit 5: 0 = allow external rom when BIOS is disabled , 1 = disable external ROM
bit 6: 0 = SPI write trigger mode, 1 = SPI read trigger mode
bit 7: 0 = MMC64 is active, 1 = MMC64 is completely disabled (**)
(*) bit can only be programmed when flash jumper is set
(**) bit can only be modified after unlocking
$DF12 (R): MMC64 status register
---------------------
bit 0: 0 = SPI ready, 1 = SPI busy
bit 1: external GAME line
bit 2: external EXROM line
bit 3: 0 = card inserted, 1 = no card inserted
bit 4: 0 = card write enabled, 1 = card write disabled
bit 5: 0 = flash jumper not set, 1 = flash jumper set
$DF13 (R/W): MMC64 identification register
-----------------------------
(R) #$64 when bit 1 of $DF11 is 0
#$01 when bit 1 of $DF11 is 1 and REV A hardware is used
#$02 when bit 1 of $DF11 is 1 and REV B hardware is used
(W) write #$55 & #$AA into this register to unlock bit 7 of $DF11
write #$0A $ #$1C into this register to re-enable MMC64 hardware
MMC64 Programming Guide
Quelltexte
ASM-Quelltext des Koala-Plugins
ASM-Quelltext des Koala-Plugins für ACME
Weitere Beispiele werden sicher in Zukunft folgen
|