Mercurial > hg > Members > kono > nitros9-code
view defs/cocosdc.d @ 3204:64ad5cd0b912
Added some HD6309 optimizations to level1's covdg.asm file.
Optimization 1) added TFM clear screen
Optimization 2) added TFM scroll screen
One of the optimizations was copied over from the level2's covdg.asm file.
| author | David Ladd <drencor-xeen@users.sourceforge.net> |
|---|---|
| date | Fri, 28 Jul 2017 15:42:20 -0500 |
| parents | 3afecdae6f53 |
| children |
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******************************************************************** * cocosdc.d - CoCo SDC definitions * * $Id$ * * Edt/Rev YYYY/MM/DD Modified by * Comment * ------------------------------------------------------------------ * 2014/05/02 Boisy G. Pitre * Created * 2014/12/22 Darren Atkinson * Additional hardware symbols IFNE COCOSDC.D-1 COCOSDC.D SET 1 * Main Port Address (V.PORT) SDAddr SET $FF4A * Hardware Addressing - CoCo Scheme CTRLATCH equ $FF40 controller latch (write) CMDREG equ $FF48 command register (write) STATREG equ $FF48 status register (read) PREG1 equ $FF49 param register 1 PREG2 equ $FF4A param register 2 PREG3 equ $FF4B param register 3 DATREGA equ PREG2 first data register DATREGB equ PREG3 second data register FLSHDAT equ $FF42 flash data register * Status Register Masks BUSY equ %00000001 set while a command is executing READY equ %00000010 set when ready for a data transfer FAILED equ %10000000 set on command failure * Command and Mode Values CMDMODE equ $43 control latch value to enable command mode CMDREAD equ $80 read logical sector CMDWRITE equ $A0 write logical sector CMDEX equ $C0 extended command CMDEXD equ $E0 extended command with data block ENDC