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oricsdk: Commit


Commit MetaInfo

Revision1553 (tree)
Time2021-01-04 03:01:20
Authordbug

Log Message

Native Joystick support changes:
- Added SAVE_COMPILER_REGISTERS and RESTORE_COMPILER_REGISTER macros to allow for IRQ code written in C
- Added OsdkJoystickType, OsdkJoystick_0, OsdkJoystick_1 variables and associated enums with the list of supported interfaces and controls
- Added joystick_type_select() and joystick_read() functions
- Added joystick.s to the list of library files

Change Summary

Incremental Difference

--- public/pc/tools/osdk/main/Osdk/_final_/include/lib.h (revision 1552)
+++ public/pc/tools/osdk/main/Osdk/_final_/include/lib.h (revision 1553)
@@ -203,4 +203,62 @@
203203 #define srand(seed) if (0) {} else {randseedLow=(seed);randseedTop=0;}
204204 #define rand() (rand32()?(randseedTop & 0x7fff):(randseedTop & 0x7fff))
205205
206+
207+//
208+// Joystick stuff
209+//
210+enum
211+{
212+ JOYSTICK_INTERFACE_NOTHING, // 0 - Default handler that does nothing
213+ JOYSTICK_INTERFACE_IJK, // 1 - IJK / Egoist / Stingy interfaces
214+ JOYSTICK_INTERFACE_PASE, // 2 - PASE / Altai interfaces
215+ JOYSTICK_INTERFACE_TELESTRAT, // 3 - Telestrat / Twilighte
216+ JOYSTICK_INTERFACE_OPEL, // 4 - OPEL interface
217+ JOYSTICK_INTERFACE_DKTRONICS, // 5 - Dk'Tronics interface
218+ _JOYSTICK_INTERFACE_COUNT_
219+};
220+
221+enum // Bitmask
222+{
223+ JOYSTICK_RIGHT = 1<<0, // 1
224+ JOYSTICK_LEFT = 1<<1, // 2
225+ JOYSTICK_FIRE = 1<<2, // 4
226+ JOYSTICK_DOWN = 1<<3, // 8
227+ JOYSTICK_UP = 1<<4 // 16
228+};
229+
230+extern unsigned char OsdkJoystickType; // Defaults to JOYSTICK_INTERFACE_NOTHING
231+void joystick_type_select(); // Set OsdkJoystickType first, and then call select
232+
233+extern unsigned char OsdkJoystick_0; // Left port status
234+extern unsigned char OsdkJoystick_1; // Right port status
235+void joystick_read(); // Should be called 50 times per second
236+
237+//
238+// These macros can be used as Prefix and Suffix of any function called from an IRQ.
239+// They are designed to save the temporary registers used by the C compiler.
240+// Please note that these macros are probably saving way too much data, and will
241+// probably be modified in the future to be less costly, but in the mean time they
242+// will do :)
243+//
244+#define SAVE_COMPILER_REGISTERS asm( \
245+"\n.(\nphp;pha;txa;pha;tya;pha;\n" \
246+" ldx #0\n" \
247+"copy_loop\n" \
248+" lda zp_compiler_save_start,x\n" \
249+" pha\n" \
250+" inx\n" \
251+" cpx #zp_compiler_save_end-zp_compiler_save_start\n" \
252+" bne copy_loop\n.)\n") {
253+
254+#define RESTORE_COMPILER_REGISTER } asm( \
255+"\n.(\nldx #zp_compiler_save_end-zp_compiler_save_start-1\n" \
256+"copy_loop2\n" \
257+" pla\n" \
258+" sta zp_compiler_save_start,x\n" \
259+" dex\n" \
260+" bpl copy_loop2\n" \
261+ "pla;tay;pla;tax;pla;plp\n.)\n")
262+
263+
206264 #endif // __LIB_H_
--- public/pc/tools/osdk/main/Osdk/_final_/lib/header.s (revision 1552)
+++ public/pc/tools/osdk/main/Osdk/_final_/lib/header.s (revision 1553)
@@ -8,6 +8,7 @@
88 ;
99 ; Most of the documentation/comments in this file are from 'Another Approach to Instruction Set Architecture—VAX'
1010 ;
11+zp_compiler_save_start
1112 ap .dsb 2 ; Argument pointer - points to the base of the list of arguments or parameters in memory that are passed to the procedure
1213 fp .dsb 2 ; Frame pointer - points to the base of the local variables of the procedure that are kept in memory (the stack frame)
1314 sp .dsb 2 ; Stack pointer - points to the top of the stack
@@ -34,6 +35,7 @@
3435 reg5 .dsb 2
3536 reg6 .dsb 2
3637 reg7 .dsb 2
38+zp_compiler_save_end
3739
3840
3941 .text
@@ -257,6 +259,26 @@
257259 #define fcomp $DF4C
258260 #define cif $DF24
259261
262+#define VIA_PORTB $0300 ; Input/Output register B
263+#define VIA_PORTAH $0301 ; Input/Output register A (with handshake)
264+#define VIA_DDRB $0302 ; Data Direction Register B
265+#define VIA_DDRA $0303 ; Data Direction Register A
266+#define VIA_T1CL $0304 ; Timer 1 low-order latches/counter
267+#define VIA_T1CH $0305 ; Timer 1 high-order counter
268+#define VIA_T1LL $0306 ; Timer 1 low-order latches
269+#define VIA_T1LH $0307 ; Timer 1 high-order latches
270+#define VIA_T2LL $0308 ; Timer 2 low-order latches/counter
271+#define VIA_T2CH $0309 ; Timer 2 high-order counter
272+#define VIA_SR $030A ; Shift Register (Buggy on many Oric, do not use)
273+#define VIA_ACR $300B ; Auxiliary Control Register
274+#define VIA_PCR $030C ; Peripheral Control Register
275+#define VIA_IFR $030D ; Interupt Flag Register
276+#define VIA_IER $030E ; Interupt Enable Register
277+#define VIA_PORTA $030F ; Input/Output register A (without handshake)
278+
279+#define VIA2_PORTB $0320 ; The Telestrat has a second VIA
280+
281+
260282 cfi
261283 jsr $DF8C
262284 ldx $D3
--- public/pc/tools/osdk/main/Osdk/_final_/lib/joystick.s (nonexistent)
+++ public/pc/tools/osdk/main/Osdk/_final_/lib/joystick.s (revision 1553)
@@ -0,0 +1,407 @@
1+;
2+; Information about the various interfaces:
3+; https://wiki.defence-force.org/doku.php?id=oric:hardware:ijk_drivers
4+; Note: the VIA_xxxx are defined in header.s
5+;
6+; This file is based on the work of multiple individuals:
7+; - Euphoric
8+; - Twilighte
9+; - ISS
10+; - Kenneth
11+;
12+
13+_OsdkJoystickType .byt 0 ; Default to "do nothing"
14+_OsdkJoystick_0 .byt 0 ; Contains the data for the left joystick port (UDFLR)
15+_OsdkJoystick_1 .byt 0 ; Contains the data for the right joystick port (UDFLR)
16+
17+_joystick_type_select
18+.(
19+ ldy _OsdkJoystickType
20+ cpy #6
21+ bcs invalid
22+ .(
23+ ; We don't want an IRQ to happen while we are doing that
24+ php
25+ sei
26+ lda keyboard_list_low,y
27+ sta patch_joystick+1
28+ lda keyboard_list_high,y
29+ sta patch_joystick+2
30+ plp
31+ .)
32+invalid
33+ rts
34+
35+keyboard_list_low
36+ .byt <_joystick_read_nothing
37+ .byt <_joystick_read_ijk
38+ .byt <_joystick_read_pase
39+ .byt <_joystick_read_telestrat
40+ .byt <_joystick_read_opel
41+ .byt <_joystick_read_dktronics
42+
43+keyboard_list_high
44+ .byt >_joystick_read_nothing
45+ .byt >_joystick_read_ijk
46+ .byt >_joystick_read_pase
47+ .byt >_joystick_read_telestrat
48+ .byt >_joystick_read_opel
49+ .byt >_joystick_read_dktronics
50+.)
51+
52+_joystick_read
53+ php
54+ sei
55+
56+ lda #0
57+ sta _OsdkJoystick_0
58+ sta _OsdkJoystick_1
59+
60+patch_joystick
61+ jsr _joystick_read_nothing
62+
63+ plp
64+ rts
65+
66+
67+_joystick_read_nothing
68+.(
69+ // Not implemented
70+ rts
71+.)
72+
73+
74+;
75+; An unusual model that connects to the expansion bus and adds two registers ($310 and $320)
76+; that can be read to return the status of the two joystick ports.
77+; 1 = UP
78+; 2 = DOWN
79+; 4 = FIRE
80+; 8 = LEFT
81+; 16 = RIGHT
82+_joystick_read_dktronics
83+.(
84+ lda #0
85+ sta _OsdkJoystick_0
86+ sta _OsdkJoystick_1
87+ lda $310 ; RLFDU -> UDFLR
88+ sta tmp+0
89+ lda $320 ; RLFDU -> UDFLR
90+ sta tmp+1
91+
92+
93+ ldx #5
94+loop_swap
95+ lsr tmp+0
96+ rol _OsdkJoystick_0
97+ lsr tmp+1
98+ rol _OsdkJoystick_1
99+ dex
100+ bne loop_swap
101+ rts
102+.)
103+
104+
105+_joystick_read_opel
106+.(
107+ ; Save VIA Status
108+ LDA VIA_PORTB
109+ PHA
110+ LDA VIA_PORTAH
111+ PHA
112+ LDA VIA_DDRB
113+ PHA
114+ LDA VIA_DDRA
115+ PHA
116+
117+ LDA #$AF
118+ STA VIA_DDRB
119+ LDA #$FF
120+ STA VIA_DDRA
121+ LDA #$00
122+ STA VIA_PORTAH
123+ LDA #$10
124+ AND VIA_PORTB
125+ BNE end_opel
126+
127+ .(
128+
129+ LDA #$BF
130+ STA VIA_PORTB
131+ LDA #$7F
132+ STA VIA_PORTAH
133+ LDX #5
134+loop_rotate
135+ LSR
136+ AND VIA_PORTB
137+ ORA #$E0
138+ ROR VIA_PORTAH
139+ DEX
140+ BNE loop_rotate ; FULDR
141+
142+ and #31
143+ tax
144+ lda OpelToIjk,x
145+
146+ sta _OsdkJoystick_0
147+ .)
148+
149+
150+end_opel
151+ ; Restore VIA Status
152+ PLA
153+ STA VIA_DDRA
154+ PLA
155+ STA VIA_DDRB
156+ PLA
157+ STA VIA_PORTAH
158+ PLA
159+ STA VIA_PORTB
160+ rts
161+.)
162+
163+; ___FULDR
164+; ___UDFLR
165+
166+OpelToIjk
167+ .byt %11111
168+ .byt %11110
169+ .byt %10111
170+ .byt %10110
171+ .byt %11101
172+ .byt %11100
173+ .byt %10101
174+ .byt %10100
175+ .byt %01111
176+ .byt %01110
177+ .byt %00111
178+ .byt %00110
179+ .byt %01101
180+ .byt %01100
181+ .byt %00101
182+ .byt %00100
183+ .byt %11011
184+ .byt %11010
185+ .byt %10011
186+ .byt %10010
187+ .byt %11001
188+ .byt %11000
189+ .byt %10001
190+ .byt %10000
191+ .byt %01011
192+ .byt %01010
193+ .byt %00011
194+ .byt %00010
195+ .byt %01001
196+ .byt %01000
197+ .byt %00001
198+ .byt %00000
199+
200+;
201+; Like the IJK interface, the PASE is connected on the printer port.
202+; This is one of the most supported interfaces, despite the fact it corrupts the sound.
203+; Variants from other companies exists, such as the Altai and Mageco interfaces
204+;
205+_joystick_read_pase
206+ ; Configure DDRA
207+ lda #%11000000
208+ sta VIA_DDRA
209+
210+ lda #%10000000
211+ sta VIA_PORTA
212+ lda VIA_PORTA ; __FUD_RL to ___UDFLR
213+ and #63
214+ tax
215+ lda PaseToIjk,x
216+ sta _OsdkJoystick_0
217+
218+
219+ lda #%01000000
220+ sta VIA_PORTA
221+ lda VIA_PORTA
222+ and #63
223+ tax
224+ lda PaseToIjk,x
225+ sta _OsdkJoystick_1
226+
227+ ; Restore DDRA
228+ lda #%11111111
229+ sta VIA_DDRA
230+ rts
231+
232+; __FUD_RL
233+; ___UDFLR
234+
235+PaseToIjk
236+ .byt %111111
237+ .byt %111101
238+ .byt %111110
239+ .byt %111100
240+ .byt %011111
241+ .byt %011101
242+ .byt %011110
243+ .byt %011100
244+ .byt %110111
245+ .byt %110101
246+ .byt %110110
247+ .byt %110100
248+ .byt %010111
249+ .byt %010101
250+ .byt %010110
251+ .byt %010100
252+ .byt %101111
253+ .byt %101101
254+ .byt %101110
255+ .byt %101100
256+ .byt %001111
257+ .byt %001101
258+ .byt %001110
259+ .byt %001100
260+ .byt %100111
261+ .byt %100101
262+ .byt %100110
263+ .byt %100100
264+ .byt %000111
265+ .byt %000101
266+ .byt %000110
267+ .byt %000100
268+ .byt %111011
269+ .byt %111001
270+ .byt %111010
271+ .byt %111000
272+ .byt %011011
273+ .byt %011001
274+ .byt %011010
275+ .byt %011000
276+ .byt %110011
277+ .byt %110001
278+ .byt %110010
279+ .byt %110000
280+ .byt %010011
281+ .byt %010001
282+ .byt %010010
283+ .byt %010000
284+ .byt %101011
285+ .byt %101001
286+ .byt %101010
287+ .byt %101000
288+ .byt %001011
289+ .byt %001001
290+ .byt %001010
291+ .byt %001000
292+ .byt %100011
293+ .byt %100001
294+ .byt %100010
295+ .byt %100000
296+ .byt %000011
297+ .byt %000001
298+ .byt %000010
299+ .byt %000000
300+
301+
302+;
303+; The IJK joystick connects to the parallel port and uses the strobe line in a clever way
304+; so that it could be prevented from corrupting sound.
305+; When the Strobe bit was set to Output(In DDRB) and low(PB4) then it enabled the interface.
306+;
307+; When the Strobe bit was set to Output(In DDRB) and low(PB4) then it enabled the interface.
308+;
309+; - B7 Select Right Joystick(Sockets were clearly identified)
310+; - B6 Select Left Joystick(Unlike Altai setting 11 will disable joys)
311+; - B5 Low whenever IJK joystick attached so could detect IJK Interface
312+; - B4 Up (Inverted)
313+; - B3 Down (Inverted)
314+; - B2 Fire (Inverted)
315+; - B1 Left (Inverted)
316+; - B0 Right (Inverted)
317+;
318+; Note that the order is identical to what the Telestrat returns
319+;
320+_joystick_read_ijk
321+.(
322+ ; Save VIA Port A state
323+ php
324+ sei
325+ lda VIA_DDRA
326+ pha
327+ lda VIA_PORTAH
328+ pha
329+
330+ ; Ensure printer strobe is set to output
331+ lda VIA_DDRB
332+ ora #%00010000
333+ sta VIA_DDRB
334+
335+ ; Set strobe low
336+ lda VIA_PORTB
337+ and #%11101111
338+ sta VIA_PORTB
339+
340+ ; Set top two bits of Port A to output and rest as input
341+ lda #%11000000
342+ sta VIA_DDRA
343+
344+ lda #%01000000 ; select left joystick
345+ sta VIA_PORTA ; read back left joystick state
346+ lda VIA_PORTA ; UDFLR
347+ and #%00011111 ; mask out unused bits
348+ eor #%00011111 ; invert bits
349+ sta _OsdkJoystick_0 ; store to variable
350+
351+ lda #%10000000 ; select right joystick
352+ sta VIA_PORTA ; read back right joystick state
353+ lda VIA_PORTA ; UDFLR
354+ and #%00011111 ; mask out unused bits
355+ eor #%00011111 ; invert bits
356+ sta _OsdkJoystick_1 ; store to variable
357+
358+ lda VIA_PORTB ; set strobe high
359+ ora #%00010000
360+ sta VIA_PORTB
361+
362+ ; Restore VIA Port A state
363+ pla
364+ sta VIA_PORTA
365+ pla
366+ sta VIA_DDRA
367+ plp
368+ rts
369+.)
370+
371+
372+;
373+; The Telestrat (unlike all its predeccesors) had two joystick Ports positioned on either side of the machine.
374+; Both were powered and both supported a second fire button. The Joystick (and second fire) was supported by Pulsoids.
375+; Both joysticks were connected to Port B of the second VIA of the Telestrat whilst the second fire was connected to
376+; Port A of the Second VIA (Location $032F)
377+;
378+; - B7 Select Right Joystick
379+; - B6 Select Left Joystick
380+; - B5 -
381+; - B4 Up (Inverted)
382+; - B3 Down (Inverted)
383+; - B2 Fire (Inverted)
384+; - B1 Left (Inverted)
385+; - B0 Right (Inverted)
386+;
387+; Note that the order is identical to what the IJK joystick interface returns
388+;
389+_joystick_read_telestrat
390+.(
391+ lda #%01000000 ; Select Left Joystick port
392+ sta VIA2_PORTB
393+ lda VIA2_PORTB ; UDFLR
394+ and #%00011111
395+ eor #%00011111
396+ sta _OsdkJoystick_0 ; store to variable
397+
398+ lda #%10000000 ; Select Right Joystick port
399+ sta VIA2_PORTB
400+ lda VIA2_PORTB ; UDFLR
401+ and #%00011111
402+ eor #%00011111
403+ sta _OsdkJoystick_1 ; store to variable
404+ rts
405+.)
406+
407+
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