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Diffstat (limited to 'docs/os12/mdfs.net/Docs/Comp/BBC/OS1-20/E6B0')
| -rw-r--r-- | docs/os12/mdfs.net/Docs/Comp/BBC/OS1-20/E6B0 | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/docs/os12/mdfs.net/Docs/Comp/BBC/OS1-20/E6B0 b/docs/os12/mdfs.net/Docs/Comp/BBC/OS1-20/E6B0 new file mode 100644 index 0000000..5f1e45f --- /dev/null +++ b/docs/os12/mdfs.net/Docs/Comp/BBC/OS1-20/E6B0 @@ -0,0 +1 @@ +*************************************************************************
* *
* OSBYTE LOOK UP TABLE
* *
*************************************************************************
E5B3 DB &21,&E8 ;OSBYTE 0 (&E821)
E5B5 DB &88,&E9 ;OSBYTE 1 (&E988)
E5B7 DB &D3,&E6 ;OSBYTE 2 (&E6D3)
E5B9 DB &97,&E9 ;OSBYTE 3 (&E997)
E5BB DB &97,&E9 ;OSBYTE 4 (&E997)
E5BD DB &76,&E9 ;OSBYTE 5 (&E976)
E5BF DB &88,&E9 ;OSBYTE 6 (&E988)
E5C1 DB &8B,&E6 ;OSBYTE 7 (&E68B)
E5C3 DB &89,&E6 ;OSBYTE 8 (&E689)
E5C5 DB &B0,&E6 ;OSBYTE 9 (&E6B0)
E5C7 DB &B2,&E6 ;OSBYTE 10 (&E6B2)
E5C9 DB &95,&E9 ;OSBYTE 11 (&E995)
E5CB DB &8C,&E9 ;OSBYTE 12 (&E98C)
E5CD DB &F9,&E6 ;OSBYTE 13 (&E6F9)
E5CF DB &FA,&E6 ;OSBYTE 14 (&E6FA)
E5D1 DB &A8,&F0 ;OSBYTE 15 (&F0A8)
E5D3 DB &06,&E7 ;OSBYTE 16 (&E706)
E5D5 DB &8C,&DE ;OSBYTE 17 (&DE8C)
E5D7 DB &C8,&E9 ;OSBYTE 18 (&E9C8)
E5D9 DB &B6,&E9 ;OSBYTE 19 (&E9B6)
E5DB DB &07,&CD ;OSBYTE 20 (&CD07)
E5DD DB &B4,&F0 ;OSBYTE 21 (&F0B4)
E5DF DB &6C,&E8 ;OSBYTE 117 (&E86C)
E5E1 DB &D9,&E9 ;OSBYTE 118 (&E9D9)
E5E3 DB &75,&E2 ;OSBYTE 119 (&E275)
E5E5 DB &45,&F0 ;OSBYTE 120 (&F045)
E5E7 DB &CF,&F0 ;OSBYTE 121 (&F0CF)
E5E9 DB &CD,&F0 ;OSBYTE 122 (&F0CD)
E5EB DB &97,&E1 ;OSBYTE 123 (&E197)
E5ED DB &73,&E6 ;OSBYTE 124 (&E673)
E5EF DB &74,&E6 ;OSBYTE 125 (&E674)
E5F1 DB &5C,&E6 ;OSBYTE 126 (&E65C)
E5F3 DB &35,&E0 ;OSBYTE 127 (&E035)
E5F5 DB &4F,&E7 ;OSBYTE 128 (&E74F)
E5F7 DB &13,&E7 ;OSBYTE 129 (&E713)
E5F9 DB &29,&E7 ;OSBYTE 130 (&E729)
E5FB DB &85,&F0 ;OSBYTE 131 (&F085)
E5FD DB &23,&D9 ;OSBYTE 132 (&D923)
E5FF DB &26,&D9 ;OSBYTE 133 (&D926)
E601 DB &47,&D6 ;OSBYTE 134 (&D647)
E603 DB &C2,&D7 ;OSBYTE 135 (&D7C2)
E605 DB &57,&E6 ;OSBYTE 136 (&E657)
E607 DB &7F,&E6 ;OSBYTE 137 (&E67F)
E609 DB &AF,&E4 ;OSBYTE 138 (&E4AF)
E60B DB &34,&E0 ;OSBYTE 139 (&E034)
E60D DB &35,&F1 ;OSBYTE 140 (&F135)
E60F DB &35,&F1 ;OSBYTE 141 (&F135)
E611 DB &E7,&DB ;OSBYTE 142 (&DBE7)
E613 DB &68,&F1 ;OSBYTE 143 (&F168)
E615 DB &E3,&EA ;OSBYTE 144 (&EAE3)
E617 DB &60,&E4 ;OSBYTE 145 (&E460)
E619 DB &AA,&FF ;OSBYTE 146 (&FFAA)
E61B DB &F4,&EA ;OSBYTE 147 (&EAF4)
E61D DB &AE,&FF ;OSBYTE 148 (&FFAE)
E61F DB &F9,&EA ;OSBYTE 149 (&EAF9)
E621 DB &B2,&FF ;OSBYTE 150 (&FFB2)
E623 DB &FE,&EA ;OSBYTE 151 (&EAFE)
E625 DB &5B,&E4 ;OSBYTE 152 (&E45B)
E627 DB &F3,&E4 ;OSBYTE 153 (&E4F3)
E629 DB &FF,&E9 ;OSBYTE 154 (&E9FF)
E62B DB &10,&EA ;OSBYTE 155 (&EA10)
E62D DB &7C,&E1 ;OSBYTE 156 (&E17C)
E62F DB &A7,&FF ;OSBYTE 157 (&FFA7)
E631 DB &6D,&EE ;OSBYTE 158 (&EE6D)
E633 DB &7F,&EE ;OSBYTE 159 (&EE7F)
E635 DB &C0,&E9 ;OSBYTE 160 (&E9C0)
E637 DB &9C,&E9 ;
E639 DB &59,&E6 ;
*************************************************************************
* *
* OSWORD LOOK UP TABLE *
* *
*************************************************************************
E63B DB &02,&E9 ;OSWORD 0 (&E902)
E63D DB &D5,&E8 ;OSWORD 1 (&E8D5)
E63F DB &E8,&E8 ;OSWORD 2 (&E8E8)
E641 DB &D1,&E8 ;OSWORD 3 (&E8D1)
E643 DB &E4,&E8 ;OSWORD 4 (&E8E4)
E645 DB &03,&E8 ;OSWORD 5 (&E803)
E647 DB &0B,&E8 ;OSWORD 6 (&E80B)
E649 DB &2D,&E8 ;OSWORD 7 (&E82D)
E64B DB &AE,&E8 ;OSWORD 8 (&E8AE)
E64D DB &35,&C7 ;OSWORD 9 (&C735)
E64F DB &F3,&CB ;OSWORD 10 (&CBF3)
E651 DB &48,&C7 ;OSWORD 11 (&C748)
E653 DB &E0,&C8 ;OSWORD 12 (&C8E0)
E655 DB &CE,&D5 ;OSWORD 13 (&D5CE)
*************************************************************************
* *
* OSBYTE 136 Execute Code via User Vector *
* *
* *CODE effectively *
* *
*************************************************************************
E658 LDA #00 ;A=0
*************************************************************************
* *
* *LINE entry *
* *
*************************************************************************
E659 JMP (&0200) ;Jump via USERV
*************************************************************************
* *
* OSBYTE 126 Acknowledge detection of ESCAPE condition *
* *
*************************************************************************
E65C LDX #&00 ;X=0
E65E BIT &FF ;if bit 7 not set there is no ESCAPE condition
E660 BPL &E673 ;so E673
E662 LDA &0276 ;else get ESCAPE Action, if this is 0
;Clear ESCAPE
;close EXEC files
;purge all buffers
;reset VDU paging counter
E665 BNE &E671 ;else do none of the above
E667 CLI ;allow interrupts
E668 STA &0269 ;number of lines printed since last halt in paged
;mode = 0
E66B JSR &F68D ;close any open EXEC files
E66E JSR &F0AA ;clear all buffers
E671 LDX #&FF ;X=&FF to indicate ESCAPE acknowledged
*************************************************************************
* *
* OSBYTE 124 Clear ESCAPE condition *
* *
*************************************************************************
E673 CLC ;clear carry
*************************************************************************
* *
* OSBYTE 125 Set ESCAPE flag *
* *
*************************************************************************
E674 ROR &FF ;clear bit 7 of ESCAPE flag
E676 BIT &027A ;read bit 7 of Tube flag
E679 BMI &E67C ;if set TUBE exists so E67C
E67B RTS ;else RETURN
;
E67C JMP &0403 ;Jump to Tube entry point
*************************************************************************
* *
* OSBYTE 137 Turn on Tape motor *
* *
*************************************************************************
E67F LDA &0282 ;get serial ULA control setting
E682 TAY ;Y=A
E683 ROL ;rotate left to get bit 7 into carry
E684 CPX #&01 ;if X=1 then user wants motor on so CARRY set else
;carry is cleared
E686 ROR ;put carry back in control RAM copy
E687 BVC &E6A7 ;if bit 6 is clear then cassette is selected
;so write to control register and RAM copy
E689 LDA #&38 ;A=ASCII 8
*************************************************************************
* *
* OSBYTE 08/07 set serial baud rates *
* *
*************************************************************************
on entry X=baud rate
A=8 transmit
A=7 receive
E68B EOR #&3F ;converts ASCII 8 to 7 binary and ASCII 7 to 8 binary
E68D STA &FA ;store result
E68F LDY &0282 ;get serial ULA control register setting
E692 CPX #&09 ;is it 9 or more?
E694 BCS &E6AD ;if so exit
E696 AND &E9AD,X ;and with byte from look up table
E699 STA &FB ;store it
E69B TYA ;put Y in A
E69C ORA &FA ;and or with Accumulator
E69E EOR &FA ;zero the three bits set true
E6A0 ORA &FB ;set up data read from look up table + bit 6
E6A2 ORA #&40 ;
E6A4 EOR &025D ;write cassette/RS423 flag
E6A7 STA &0282 ;store serial ULA flag
E6AA STA &FE10 ;and write to control register
E6AD TYA ;put Y in A to save old contents
E6AE TAX ;write new setting to X
E6AF RTS ;and return
OS SERIES VII
GEOFF COX
*************************************************************************
* *
* OSBYTE 9 Duration of first colour *
* *
*************************************************************************
;on entry Y=0, X=new value
E6B0 INY ;Y is incremented to 1
E6B1 CLC ;clear carry
*************************************************************************
* *
* OSBYTE 10 Duration of second colour *
* *
*************************************************************************
;on entry Y=0 or 1 if from FX 9 call, X=new value
E6B2 LDA &0252,Y ;get mark period count
E6B5 PHA ;push it
E6B6 TXA ;get new count
E6B7 STA &0252,Y ;store it
E6BA PLA ;get back original value
E6BB TAY ;put it in Y
E6BC LDA &0251 ;get value of flash counter
E6BF BNE &E6D1 ;if not zero E6D1
E6C1 STX &0251 ;else restore old value
E6C4 LDA &0248 ;get current video ULA control register setting
E6C7 PHP ;push flags
E6C8 ROR ;rotate bit 0 into carry, carry into bit 7
E6C9 PLP ;get back flags
E6CA ROL ;rotate back carry into bit 0
E6CB STA &0248 ;store it in RAM copy
E6CE STA &FE20 ;and ULA control register
E6D1 BVC &E6AD ;then exit via OSBYTE 7/8
*************************************************************************
* *
* OSBYTE 2 select input stream *
* *
*************************************************************************
;on input X contains stream number
E6D3 TXA ;A=X
E6D4 AND #&01 ;blank out bits 1 - 7
E6D6 PHA ;push A
E6D7 LDA &0250 ;and get current ACIA control setting
E6DA ROL ;Bit 7 into carry
E6DB CPX #&01 ;if X>=1 then
E6DD ROR ;bit 7 of A=1
E6DE CMP &0250 ;compare this with ACIA control setting
E6E1 PHP ;push processor
E6E2 STA &0250 ;put A into ACIA control setting
E6E5 STA &FE08 ;and write to control register
E6E8 JSR &E173 ;set up RS423 buffer
E6EB PLP ;get back P
E6EC BEQ &E6F1 ;if new setting different from old E6F1 else
E6EE BIT &FE09 ;set bit 6 and 7
E6F1 LDX &0241 ;get current input buffer number
E6F4 PLA ;get back A
E6F5 STA &0241 ;store it
E6F8 RTS ;and return
*************************************************************************
* *
* OSBYTE 13 disable events *
* *
*************************************************************************
;X contains event number 0-9
E6F9 TYA ;Y=0 A=0
*************************************************************************
* *
* OSBYTE 14 enable events *
* *
*************************************************************************
;X contains event number 0-9
E6FA CPX #&0A ;if X>9
E6FC BCS &E6AE ;goto E6AE for exit
E6FE LDY &02BF,X ;else get event enable flag
E701 STA &02BF,X ;store new value in flag
E704 BVC &E6AD ;and exit via E6AD
*************************************************************************
* *
* OSBYTE 16 Select A/D channel *
* *
*************************************************************************
;X contains channel number or 0 if disable conversion
E706 BEQ &E70B ;if X=0 then E70B
E708 JSR &DE8C ;start conversion
E70B LDA &024D ;get current maximum ADC channel number
E70E STX &024D ;store new value
E711 TAX ;put old value in X
E712 RTS ;and exit
;
*************************************************************************
* *
* OSBYTE 129 Read key within time limit *
* *
*************************************************************************
;X and Y contains either time limit in centi seconds Y=&7F max
; or Y=&FF and X=-ve INKEY value
E713 TYA ;A=Y
E714 BMI &E721 ;if Y=&FF the E721
E716 CLI ;else allow interrupts
E717 JSR &DEBB ;and go to timed routine
E71A BCS &E71F ;if carry set then E71F
E71C TAX ;then X=A
E71D LDA #&00 ;A=0
E71F TAY ;Y=A
E720 RTS ;and return
;
;scan keyboard
E721 TXA ;A=X
E722 EOR #&7F ;convert to keyboard input
E724 TAX ;X=A
E725 JSR &F068 ;then scan keyboard
E728 ROL ;put bit 7 into carry
E729 LDX #&FF ;X=&FF
E72B LDY #&FF ;Y=&FF
E72D BCS &E731 ;if bit 7 of A was set goto E731 (RTS)
E72F INX ;else X=0
E730 INY ;and Y=0
E731 RTS ;and exit
********** check occupancy of input or free space of output buffer *******
;X=buffer number
;Buffer number Address Flag Out pointer In pointer
;0=Keyboard 3E0-3FF 2CF 2D8 2E1
;1=RS423 Input A00-AFF 2D0 2D9 2E2
;2=RS423 output 900-9BF 2D1 2DA 2E3
;3=printer 880-8BF 2D2 2DB 2E4
;4=sound0 840-84F 2D3 2DC 2E5
;5=sound1 850-85F 2D4 2DD 2E6
;6=sound2 860-86F 2D5 2DE 2E7
;7=sound3 870-87F 2D6 2DF 2E8
;8=speech 8C0-8FF 2D7 2E0 2E9
E732 TXA ;buffer number in A
E733 EOR #&FF ;invert it
E735 TAX ;X=A
E736 CPX #&02 ;is X>1
E738 CLV ;clear V flag
E739 BVC &E73E ;and goto E73E count buffer
E73B BIT &D9B7 ;set V
E73E JMP (&022E) ;CNPV defaults to E1D1
************* check RS423 input buffer ************************************
E741 SEC
E742 LDX #&01 ;X=1 to point to buffer
E744 JSR &E738 ;and count it
E747 CPY #&01 ;if the hi byte of the answer is 1 or more
E749 BCS &E74E ;then Return
E74B CPX &025B ;else compare with minimum buffer space
E74E RTS ;and exit
*************************************************************************
* *
* OSBYTE 128 READ ADC CHANNEL *
* *
*************************************************************************
;ON Entry: X=0 Exit Y contains number of last channel converted
; X=channel number X,Y contain 16 bit value read from channe
; X<0 Y=&FF X returns information about various buffers
; X=&FF (keyboard ) X=number of characters in buffer
; X=&FE (RS423 Input) X=number of characters in buffer
; X=&FD (RS423 output) X=number of empty spaces in buffer
; X=&FC (Printer) X=number of empty spaces in buffer
; X=&FB (sound 0) X=number of empty spaces in buffer
; X=&FA (sound 1) X=number of empty spaces in buffer
; X=&F9 (sound 2) X=number of empty spaces in buffer
; X=&F8 (sound 3) X=number of empty spaces in buffer
; X=&F7 (Speech ) X=number of empty spaces in buffer
E74F BMI &E732 ;if X is -ve then E732 count spaces
E751 BEQ &E75F ;if X=0 then E75F
E753 CPX #&05 ;else check for Valid channel
E755 BCS &E729 ;if not E729 set X & Y to 0 and exit
E757 LDY &02B9,X ;get conversion values for channel of interest Hi &
E75A LDA &02B5,X ;lo byte
E75D TAX ;X=lo byte
E75E RTS ;and exit
E75F LDA &FE40 ;read system VIA port B
E762 ROR ;move high nybble to low
E763 ROR ;
E764 ROR ;
E765 ROR ;
E766 EOR #&FF ;and invert it
E768 AND #&03 ;isolate the FIRE buttons
E76A LDY &02BE ;get analogue system flag byte
E76D STX &02BE ;store X here
E770 TAX ;A=X bits 0 and 1 indicate fire buttons
E771 RTS ;and return
**************************************************************************
**************************************************************************
** **
** OSBYTE DEFAULT ENTRY POINT **
** **
** pointed to by default BYTEV **
** **
**************************************************************************
**************************************************************************
E772 PHA ;save A
E773 PHP ;save Processor flags
E774 SEI ;disable interrupts
E775 STA &EF ;store A,X,Y in zero page
E777 STX &F0 ;
E779 STY &F1 ;
E77B LDX #&07 ;X=7 to signal osbyte is being attempted
E77D CMP #&75 ;if A=0-116
E77F BCC &E7C2 ;then E7C2
E781 CMP #&A1 ;if A<161
E783 BCC &E78E ;then E78E
E785 CMP #&A6 ;if A=161-165
E787 BCC &E7C8 ;then EC78
E789 CLC ;clear carry
E78A LDA #&A1 ;A=&A1
E78C ADC #&00 ;
********* process osbyte calls 117 - 160 *****************************
E78E SEC ;set carry
E78F SBC #&5F ;convert to &16 to &41 (22-65)
E791 ASL ;double it (44-130)
E792 SEC ;set carry
E793 STY &F1 ;store Y
E795 TAY ;Y=A
E796 BIT &025E ;read econet intercept flag
E799 BPL &E7A2 ;if no econet intercept required E7A2
E79B TXA ;else A=X
E79C CLV ;V=0
E79D JSR &E57E ; to JMP via ECONET vector
E7A0 BVS &E7BC ;if return with V set E7BC
E7A2 LDA &E5B4,Y ;get address from table
E7A5 STA &FB ;store it as hi byte
E7A7 LDA &E5B3,Y ;repeat for lo byte
E7AA STA &FA ;
E7AC LDA &EF ;restore A
E7AE LDY &F1 ;Y
E7B0 BCS &E7B6 ;if carry is set E7B6
E7B2 LDY #&00 ;else
E7B4 LDA (&F0),Y ;get value from address pointed to by &F0/1 (Y,X)
E7B6 SEC ;set carry
E7B7 LDX &F0 ;restore X
E7B9 JSR &F058 ;call &FA/B
E7BC ROR ;C=bit 0
E7BD PLP ;get back flags
E7BE ROL ;bit 0=Carry
E7BF PLA ;get back A
E7C0 CLV ;clear V
E7C1 RTS ;and exit
*************** Process OSBYTE CALLS BELOW &75 **************************
E7C2 LDY #&00 ;Y=0
E7C4 CMP #&16 ;if A<&16
E7C6 BCC &E791 ;goto E791
E7C8 PHP ;push flags
E7C9 PHP ;push flags
E7CA PLA ;pull flags
E7CB PLA ;pull flags
E7CC JSR &F168 ;offer paged ROMS service 7/8 unrecognised osbyte/word
E7CF BNE &E7D6 ;if roms don't recognise it then E7D6
E7D1 LDX &F0 ;else restore X
E7D3 JMP &E7BC ;and exit
E7D6 PLP ;else pull flags
E7D7 PLA ;and A
E7D8 BIT &D9B7 ;set V and C
E7DB RTS ;and return
E7DC LDA &EB ;read cassette critical flag bit 7 = busy
E7DE BMI &E812 ;if busy then EB12
E7E0 LDA #&08 ;else A=8 to check current Catalogue status
E7E2 AND &E2 ;by anding with CFS status flag
E7E4 BNE &E7EA ;if not set (not in use) then E7EA RTS
E7E6 LDA #&88 ;A=%10001000
E7E8 AND &BB ;AND with FS options (short msg bits)
E7EA RTS ;RETURN
**************************************************************************
**************************************************************************
** **
** OSWORD DEFAULT ENTRY POINT **
** **
** pointed to by default WORDV **
** **
**************************************************************************
**************************************************************************
E7EB PHA ;Push A
E7EC PHP ;Push flags
E7ED SEI ;disable interrupts
E7EE STA &EF ;store A,X,Y
E7F0 STX &F0 ;
E7F2 STY &F1 ;
E7F4 LDX #&08 ;X=8
E7F6 CMP #&E0 ;if A=>224
E7F8 BCS &E78A ;then E78A with carry set
E7FA CMP #&0E ;else if A=>14
E7FC BCS &E7C8 ;else E7C8 with carry set pass to ROMS & exit
E7FE ADC #&44 ;add to form pointer to table
E800 ASL ;double it
E801 BCC &E793 ;goto E793 ALWAYS!! (carry clear E7F8)
;this reads bytes from table and enters routine
*************************************************************************
* *
* OSWORD 05 ENTRY POINT *
* *
* read a byte from I/O memory *
* *
*************************************************************************
;block of 4 bytes set at address pointed to by 00F0/1 (Y,X)
;XY +0 ADDRESS of byte
; +4 on exit byte read
E803 JSR &E815 ;set up address of data block
E806 LDA (&F9,X) ;get byte
E808 STA (&F0),Y ;store it
E80A RTS ;exit
*************************************************************************
* *
* OSWORD 06 ENTRY POINT *
* *
* write a byte to I/O memory *
* *
*************************************************************************
;block of 5 bytes set at address pointed to by 00F0/1 (Y,X)
;XY +0 ADDRESS of byte
; +4 byte to be written
E80B JSR &E815 ;set up address
E80E LDA (&F0),Y ;get byte
E810 STA (&F9,X) ;store it
E812 LDA #&00 ;a=0
E814 RTS ;exit
********************: set up data block *********************************
E815 STA &FA ;&FA=A
E817 INY ;Y=1
E818 LDA (&F0),Y ;get byte from block
E81A STA &FB ;store it
E81C LDY #&04 ;Y=4
E81E LDX #&01 ;X=1
E820 RTS ;and exit
*************************************************************************
* *
* OSBYTE 00 ENTRY POINT *
* *
* read OS version number *
* *
*************************************************************************
E821 BNE &E81E ;if A <> 0 then exit else print error
E823 BRK ;
E824 DB &F7 ;error number
E825 DB 'OS 1.20' ;error message
E82C BRK
\ No newline at end of file |