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*
** FLEX 9 COMPACT FLASH / IDE DISK DRIVERS
*
* FOR SYS09BUG ON THE XESS XSA-3S1000 & XST3.0
* WITH I/O MAPPED AT $XE000
* AND ROM MAPPED AT $XF000
*
* These drivers should work with either
* an IDE disk drive or a IDE CF adapter card
* It uses 16 bit transfer mode,
* as some IDE drives do not support
* the set feature command found on CF cards
* that allows for 8 bit operation
*
*
IMASK  EQU $10     IRQ MASK CC
FMASK  EQU $40     FIRQ MASK CC
*
CF_BASE    EQU $E100
CF_DATA    EQU CF_BASE+0
CF_ERROR   EQU CF_BASE+2 ; read error
CF_FEATURE EQU CF_BASE+2 ; write feature
CF_SECCNT  EQU CF_BASE+4
CF_SECNUM  EQU CF_BASE+6
CF_CYLLO   EQU CF_BASE+8
CF_CYLHI   EQU CF_BASE+10
CF_HEAD    EQU CF_BASE+12
CF_STATUS  EQU CF_BASE+14 ; read status
CF_COMAND  EQU CF_BASE+14 ; write command
CF_AUX     EQU CF_BASE+30 ; Reset register
*
* Command Equates
*
CMDREAD    EQU $20 ; Read Single sector
CMDWRITE   EQU $30 ; Write Single sector
AUXRESET   EQU $06
AUXRSTREL  EQU $02
HEADLBA    EQU $E0
*
* Status bit equates
*
BSY        EQU $80
DRDY       EQU $40
DRQ        EQU $08
ERR        EQU $01
       ORG   $DE00
*
* DISK DRIVER JUMP TABLE
*
READ   JMP   READSC
WRITE  JMP   WRITSC
VERIFY JMP   BUSY
RESTOR JMP   RESTR1
DRIVE  JMP   DRVSEL
DRVRDY JMP   CHKDRV
QUICK  JMP   CHKDRV
COLDDR JMP   INITDR
WARMDR JMP   WARMD1
SEEK   JMP   SEEKTS
*
* RAM SPACE
*
DRVNUM FCB   0
*
*
* INITIALIZE CF CARD
*
INITDR LDD #AUXRESET
       STD CF_AUX
       LDD #AUXRSTREL
       STD CF_AUX
       LDD  #HEADLBA
       STD  CF_HEAD
       BRA WAITRDY
*
* RESTORE DISK DRIVER (SEEK TRACK 00)
*
RESTR1 BSR   DRVSEL
       CLRA           ; Track 0
       LDB   #$01     ; Sector 1
*
* Seek track and sector
* A holds track number (0 - ??)
* B holds sector number (1 - ??)
* Sector numbers starts from 1
* subtract 1 to start from sector 0 on CF
*
SEEKTS DECB
       PSHS A
       CLRA
       STD  CF_SECNUM
       LDB ,S
       STD  CF_CYLLO
       LDB  DRVNUM
       STD  CF_CYLHI
       LDB  #$01
       STD  CF_SECCNT
       PULS A
       CLRB
WARMD1 RTS
*
* READ SECTORS FROM CF
*
*
READSC BSR  SEEKTS
       LDD  #CMDREAD ; IDE READ MULTIPLE
       STD  CF_COMAND
       BSR  WAITRDY
*
* READ LOOP
*
       PSHS Y
       LDY  #256
RDLP1  BSR  WAITDRQ
       LDD  CF_DATA
       STB  ,X+
       LEAY -1,Y
       BNE  RDLP1
       PULS Y
*
       BSR  WAITRDY
       CLRB
       RTS
*
* WRITE SECTOR TO CF
*
WRITSC BSR  SEEKTS   ; SEEK TRACK & SECTOR
       LDD  #CMDWRITE; IDE WRITE MULTIPLE
       STD  CF_COMAND
       BSR  WAITRDY
*
* WRITE LOOP
*
       PSHS Y
       LDY #256
       CLRA
WRTLP1 BSR  WAITDRQ
       LDB  ,X+
       STD  CF_DATA
       LEAY -1,Y
       BNE  WRTLP1
       PULS Y
*
       BSR  WAITRDY
       CLRB
       RTS
*
* CHECK FOR BUSY
* Doubles as VERIFY
*
BUSY   CLRB            Never busy
       RTS
*
* DRIVE SELECT DISK DRIVER
*
DRVSEL LDA   3,X       GET DRIVE # FROM FCB
       CMPA  #3
       BLS   DRVS2     IF > 3, SET IT TO 0
       CLRA
DRVS2  STA   DRVNUM
       CLRB            ; SET Z, CLEAR C
       RTS
*
* CHECK DRIVE READY DISK DRIVER
*
CHKDRV LDA  3,X
       CLRB             ; CLEAR C, SET Z
       RTS
*
* WAIT UNTIL READY
*
WAITRDY LDD  CF_STATUS
        BITB #BSY
        BNE  WAITRDY
        LDD  CF_STATUS
        BITB #DRDY
        BEQ  WAITRDY
        RTS
*
* WAIT FOR DATA REQUEST
*
WAITDRQ LDD  CF_STATUS
        BITB #DRQ
        BEQ  WAITDRQ
        RTS
*
        END
 

Line No.	Rev	Author	Line
1	42	davidgb	`*`
2			`** FLEX 9 COMPACT FLASH / IDE DISK DRIVERS`
3			`*`
4			`* FOR SYS09BUG ON THE XESS XSA-3S1000 & XST3.0`
5			`* WITH I/O MAPPED AT $XE000`
6			`* AND ROM MAPPED AT $XF000`
7			`*`
8			`* These drivers should work with either`
9			`* an IDE disk drive or a IDE CF adapter card`
10			`* It uses 16 bit transfer mode,`
11			`* as some IDE drives do not support`
12			`* the set feature command found on CF cards`
13			`* that allows for 8 bit operation`
14			`*`
15			`*`
16			`IMASK EQU $10 IRQ MASK CC`
17			`FMASK EQU $40 FIRQ MASK CC`
18			`*`
19			`CF_BASE EQU $E100`
20			`CF_DATA EQU CF_BASE+0`
21			`CF_ERROR EQU CF_BASE+2 ; read error`
22			`CF_FEATURE EQU CF_BASE+2 ; write feature`
23			`CF_SECCNT EQU CF_BASE+4`
24			`CF_SECNUM EQU CF_BASE+6`
25			`CF_CYLLO EQU CF_BASE+8`
26			`CF_CYLHI EQU CF_BASE+10`
27			`CF_HEAD EQU CF_BASE+12`
28			`CF_STATUS EQU CF_BASE+14 ; read status`
29			`CF_COMAND EQU CF_BASE+14 ; write command`
30			`CF_AUX EQU CF_BASE+30 ; Reset register`
31			`*`
32			`* Command Equates`
33			`*`
34			`CMDREAD EQU $20 ; Read Single sector`
35			`CMDWRITE EQU $30 ; Write Single sector`
36			`AUXRESET EQU $06`
37			`AUXRSTREL EQU $02`
38			`HEADLBA EQU $E0`
39			`*`
40			`* Status bit equates`
41			`*`
42			`BSY EQU $80`
43			`DRDY EQU $40`
44			`DRQ EQU $08`
45			`ERR EQU $01`
46			`ORG $DE00`
47			`*`
48			`* DISK DRIVER JUMP TABLE`
49			`*`
50			`READ JMP READSC`
51			`WRITE JMP WRITSC`
52			`VERIFY JMP BUSY`
53			`RESTOR JMP RESTR1`
54			`DRIVE JMP DRVSEL`
55			`DRVRDY JMP CHKDRV`
56			`QUICK JMP CHKDRV`
57			`COLDDR JMP INITDR`
58			`WARMDR JMP WARMD1`
59			`SEEK JMP SEEKTS`
60			`*`
61			`* RAM SPACE`
62			`*`
63			`DRVNUM FCB 0`
64			`*`
65			`*`
66			`* INITIALIZE CF CARD`
67			`*`
68			`INITDR LDD #AUXRESET`
69			`STD CF_AUX`
70			`LDD #AUXRSTREL`
71			`STD CF_AUX`
72			`LDD #HEADLBA`
73			`STD CF_HEAD`
74			`BRA WAITRDY`
75			`*`
76			`* RESTORE DISK DRIVER (SEEK TRACK 00)`
77			`*`
78			`RESTR1 BSR DRVSEL`
79			`CLRA ; Track 0`
80			`LDB #$01 ; Sector 1`
81			`*`
82			`* Seek track and sector`
83			`* A holds track number (0 - ??)`
84			`* B holds sector number (1 - ??)`
85			`* Sector numbers starts from 1`
86			`* subtract 1 to start from sector 0 on CF`
87			`*`
88			`SEEKTS DECB`
89			`PSHS A`
90			`CLRA`
91			`STD CF_SECNUM`
92			`LDB ,S`
93			`STD CF_CYLLO`
94			`LDB DRVNUM`
95			`STD CF_CYLHI`
96			`LDB #$01`
97			`STD CF_SECCNT`
98			`PULS A`
99			`CLRB`
100			`WARMD1 RTS`
101			`*`
102			`* READ SECTORS FROM CF`
103			`*`
104			`*`
105			`READSC BSR SEEKTS`
106			`LDD #CMDREAD ; IDE READ MULTIPLE`
107			`STD CF_COMAND`
108			`BSR WAITRDY`
109			`*`
110			`* READ LOOP`
111			`*`
112			`PSHS Y`
113			`LDY #256`
114			`RDLP1 BSR WAITDRQ`
115			`LDD CF_DATA`
116			`STB ,X+`
117			`LEAY -1,Y`
118			`BNE RDLP1`
119			`PULS Y`
120			`*`
121			`BSR WAITRDY`
122			`CLRB`
123			`RTS`
124			`*`
125			`* WRITE SECTOR TO CF`
126			`*`
127			`WRITSC BSR SEEKTS ; SEEK TRACK & SECTOR`
128			`LDD #CMDWRITE; IDE WRITE MULTIPLE`
129			`STD CF_COMAND`
130			`BSR WAITRDY`
131			`*`
132			`* WRITE LOOP`
133			`*`
134			`PSHS Y`
135			`LDY #256`
136			`CLRA`
137			`WRTLP1 BSR WAITDRQ`
138			`LDB ,X+`
139			`STD CF_DATA`
140			`LEAY -1,Y`
141			`BNE WRTLP1`
142			`PULS Y`
143			`*`
144			`BSR WAITRDY`
145			`CLRB`
146			`RTS`
147			`*`
148			`* CHECK FOR BUSY`
149			`* Doubles as VERIFY`
150			`*`
151			`BUSY CLRB Never busy`
152			`RTS`
153			`*`
154			`* DRIVE SELECT DISK DRIVER`
155			`*`
156			`DRVSEL LDA 3,X GET DRIVE # FROM FCB`
157			`CMPA #3`
158			`BLS DRVS2 IF > 3, SET IT TO 0`
159			`CLRA`
160			`DRVS2 STA DRVNUM`
161			`CLRB ; SET Z, CLEAR C`
162			`RTS`
163			`*`
164			`* CHECK DRIVE READY DISK DRIVER`
165			`*`
166			`CHKDRV LDA 3,X`
167			`CLRB ; CLEAR C, SET Z`
168			`RTS`
169			`*`
170			`* WAIT UNTIL READY`
171			`*`
172			`WAITRDY LDD CF_STATUS`
173			`BITB #BSY`
174			`BNE WAITRDY`
175			`LDD CF_STATUS`
176			`BITB #DRDY`
177			`BEQ WAITRDY`
178			`RTS`
179			`*`
180			`* WAIT FOR DATA REQUEST`
181			`*`
182			`WAITDRQ LDD CF_STATUS`
183			`BITB #DRQ`
184			`BEQ WAITDRQ`
185			`RTS`
186			`*`
187			`END`
188

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[/] [System09/] [branches/] [mkfiles_rev1/] [src/] [Flex9/] [f9-dkide.asm] - Blame information for rev 72