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Test with phantom slots

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This commit is contained in:
Florian Reitz 2017-12-17 21:27:04 +01:00
parent 06efc602c4
commit fe9ae43e09
5 changed files with 78 additions and 65 deletions
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AppleIISd.bin
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AppleIISd.hex
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8
src/AppleIISd.s
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@ -1,7 +1,7 @@
;*******************************
;
; Apple][Sd Firmware
; Version 1.1
; Version 1.2
; Main source
;
; (c) Florian Reitz, 2017
@ -29,14 +29,14 @@
; 65535 blocks
; Removable media
; Non-interruptable
; 2 drives
; 4 drives
; Read, write and status allowed
;
;*******************************
.segment "SLOTID"
.dbyt $FFFF ; 65535 blocks
.byt $97 ; Status bits
.byt $B7 ; Status bits
.byt <DRIVER ; LSB of driver
@ -365,7 +365,7 @@ INIT: LDA #$03 ; set SPI mode 3
RTS
TEXT: .asciiz " Apple][Sd v1.1 (c)2017 Florian Reitz"
TEXT: .asciiz " Apple][Sd v1.2 (c)2017 Florian Reitz"
CMD0: .byt $40, $00, $00
.byt $00, $00, $95

23
src/Helper.s
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@ -1,7 +1,7 @@
;*******************************
;
; Apple][Sd Firmware
; Version 1.1
; Version 1.2
; Helper functions
;
; (c) Florian Reitz, 2017
@ -118,16 +118,29 @@ GETBLOCK: PHX ; save X
STA R33,X ; in R30-R33
LDA BLOCK+1
STA R32,X
LDA #0
STA R31,X
STA R30,X
STZ R31,X
STZ R30,X
LDA #$80 ; drive number
AND $43
BEQ @SDHC ; D1
BEQ @SLOT ; D1
LDA #1 ; D2
STA R31,X
@SLOT: LDA SLOT
PHA ; save SLOT
LDA #$70 ; slot number * 16
AND $43
STA SLOT
CPY SLOT
BEQ @RESTORE ; slot number = real slot?
LDA R31,X ; is phantom slot
INC A
STA R31,X
@RESTORE: PLA ; restore SLOT
STA SLOT
@SDHC: LDA #SDHC
AND SS,Y ; if card is SDHC,
BNE @END ; use block addressing

2
src/ProDOS.s
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@ -1,7 +1,7 @@
;*******************************
;
; Apple][Sd Firmware
; Version 1.1
; Version 1.2
; ProDOS functions
;
; (c) Florian Reitz, 2017