mirror of https://github.com/GnoConsortium/gno.git
717 lines
13 KiB
NASM
717 lines
13 KiB
NASM
* Serial Interrupt Manager Permanent INIT file
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setcom 60
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case on
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mcopy sim.mac
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dummysim2 start ; ends up in .root
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end
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************************************************************************
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* Global Firmware Equates
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v_Main gequ $E10010
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v_AppleTalk gequ $E10020
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v_Serial gequ $E10024
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* Address of SerFlag is same for all three ROM revisions of the IIGS
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SerFlag gequ $E10104
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* This value determines whether SIM is installed as a user tool or
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* as a system tool.
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sysFlag gequ 0 make '$8000' to install as user tool
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* This value determines not only which tool set number SIM should be
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* installed as, but also the error codes that are returned
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toolNum gequ $4000 change to $0400 for user tool
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* Current version of SIM in tool version format
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Version gequ $0100
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copy simequates.equ
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* Request proc dataOut map
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Gcount gequ 0
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Gerror gequ 2
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Gversion gequ 4
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* Input buffer data structure for Install and Remove calls
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SIMport gequ 0
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SIMaddress gequ 2
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************************************************************************
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* Install our RequestProc, and install the new interrupt handlers, etc.
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SIMINIT START
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using SIMData
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phb
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phk
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plb
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lda #0
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sta IntVectPrinter indicate that no vectors are
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sta IntVectPrinter+2 installed
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sta IntVectModem
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sta IntVectModem+2
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sta ExtVect1
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sta ExtVect1+2
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* gdr: commented out because it seems that the ExtVect2 code was never
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* finished.
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* sta ExtVect2
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* sta ExtVect2+2
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sta ourSerFlag no SCC interrupts are handled
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* Turn off interrupts while we do the dirty deed
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php
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sei
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* set the IIGS main interrupt vector to point to our version of this
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* routine. This code only works on a ROM 01 at this point due to the
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* different code locations.
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* We check the ROM version here and install the appropriate routine
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jsr GetROMVersion
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cmp #0
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beq doRom0
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cmp #1
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beq doRom0
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lda jmpit3
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sta >v_Main
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lda jmpit3+2
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sta >v_Main+2
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bra donePatch
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doRom0 lda jmpit1
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sta >v_Main
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lda jmpit1+2
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sta >v_Main+2
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donePatch plp
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ph4 #SIMName
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pha
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_MMStartUp
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pla
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sta SIMuserID
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pha
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ph4 #SIMRequest
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_AcceptRequests
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jsl CheckPort
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plb
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rtl
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jmpit1 jmp >ROM01IntVect
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jmpit3 jmp >ROM03IntVect
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END
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ROM03IntVect START
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using SIMData
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clc (E1/0010 JMPs here, FF/BC6C)
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xce
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long mx
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php
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phb
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; Assume B=00E1
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pea $E1E1
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plb
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sta |$0108 ; ASave
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lda |$C035 ; shadow register
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sta |$0119 ; ShadSave
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ora #$8000
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and #$9F3E
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sta |$C035 ; shadow register
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stx |$010A ; XSave
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sty |$010C ; YSave
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tdc
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sta |$0110 ; DPSave
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lda #$0000
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tcd
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short mx
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bcc NotSure ; check emulation mode
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lda $04,s ; and check for brk
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and #$10
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adc #$70
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NotSure bvc hmm3
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* $$$ ROM DEPENDENT ENTRY POINT $$$
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jmp >$FFBD16
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hmm3 lda #$03
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sta |$C039 SCCAREG
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lda |$C039 SCCAREG
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bit |$0103 ATlkFlag
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beq SerInt2
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pha
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and #$07
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bne ChanB
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lda |$C03B SCCADATA
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sta |$0105 SerIntData
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lda |$C03B SCCADATA
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sta |$0106 SerIntData+1
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jsl >v_AppleTalk
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bra Next
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ChanB lda $C03A SCCBDATA
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sta |$0105 SerIntData
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lda $C03A SCCBDATA
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sta |$0106 SerIntData+1
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jsl >v_AppleTalk IRQ_ATalk
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Next lda >$010101
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sta |$011C
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lda #$00
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ror a
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sta |$E10101
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pla
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bra Next2 not appletalk?
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SerInt2 pha
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lda >$010101
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sta |$011C
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stz |$E10101
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jsl >$E1021C MIDI?
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pla
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bcc handledIt was a midi interrupt, exit intr
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clc
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Next2 anop
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pha
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and >ourSerFlag
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beq notOurSerIntr
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lda 1,s
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bit #%00000111
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beq doPortPrinter
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jsl >IntVectModem
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rol $0101
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doPortPrinter anop
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lda 1,s
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and >ourSerFlag
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beq notOurSerIntr1
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bit #%00111000
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beq notOurSerIntr1
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jsl >IntVectPrinter
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rol $0101
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notOurSerIntr1 pla
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lda $0101
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beq handledIt
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* $$$ ROM DEPENDENT ENTRY POINT $$$
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* was a SCC interrupt, but we didn't install it!
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jmp >$FFBD15
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notOurSerIntr anop
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* $$$ ROM DEPENDENT ENTRY POINT
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* check for 'external' interrupts here
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jsr checkExternal
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bcs handledIt1
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lda 1,s
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jmp >$FFBCFA ; Back to the real intr handler
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handledIt1 pla
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handledIt long mx
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plb
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* $$$ ROM DEPENDENT ENTRY POINT $$$
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jmp >$FFBF58 ; Exit
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END
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ROM01IntVect START
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using SIMData
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clc
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xce
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long mx
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php
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phb
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pea $E1E1
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plb
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sta $0108
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lda $C035
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sta $0119
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ora #$8000
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and #$9F1E
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sta $C035
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stx $010A
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sty $010C
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tdc
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sta $0110
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lda #0
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tcd
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short mx
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bcc sw2 emulation mode?
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lda 4,s yes check to see if this intr is a BRK
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and #$10
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adc #$70
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sw2 bvc switch1
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* $$$ ROM DEPENDENT ENTRY POINT
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jmp >$FFB85F it was a BRK, let the firmware handle it
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switch1 lda #3
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sta $C039
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lda $C039
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bit $0103
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beq X_B83F
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pha
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and #$07
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bne X_B826
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lda $C03B
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sta $0105
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lda $C03B
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sta $0106
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jsl >v_AppleTalk
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bra X_B836
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X_B826 lda $C03A
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sta $0105
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lda $C03A
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sta $0106
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jsl >v_AppleTalk
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X_B836 lda #0
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ror a
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sta $0101
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pla
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bra X_B842
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X_B83F stz $0101
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X_B842 pha
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and >ourSerFlag
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beq notOurSerIntr
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lda 1,s
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bit #%00000111
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beq doPortPrinter
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jsl >IntVectModem
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rol $0101
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doPortPrinter anop
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lda 1,s
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and >ourSerFlag
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beq notOurSerIntr1
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bit #%00111000
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beq notOurSerIntr1
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jsl >IntVectPrinter
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rol $0101
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notOurSerIntr1 pla
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lda $0101
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beq handledIt
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* $$$ ROM DEPENDENT ENTRY POINT
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jmp >$FFB85E
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handledIt1 pla
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handledIt long mx
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plb
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* $$$ ROM DEPENDENT ENTRY POINT
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jmp >$FFBA86
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notOurSerIntr anop
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* $$$ ROM DEPENDENT ENTRY POINT
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* check 'external' interrupt sources here
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jsr checkExternal
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bcs handledIt1
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lda 1,s
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jmp >$FFB843 ; Back to the real intr handler
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END
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SIMRequest START
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using SIMData
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misc equ 3
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result equ 14+misc
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reqCode equ 12+misc
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dataIn equ 8+misc
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dataOut equ 4+misc
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rtl equ 1+misc
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phb
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phk
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plb
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phd
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tsc
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tcd
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lda reqCode
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cmp #$8003
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jcs exitRequestErr
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cmp #$8000
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jcc exitRequestErr
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and #$00FF
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asl a
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tax
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jmp (requestProcs,X)
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requestProcs dc a2'doInstall'
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dc a2'doRemove'
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dc a2'doVersion'
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doInstall anop
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ldy #SIMport
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lda [dataIn],y
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jsr ValidatePort
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bcs notValidPort
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cmp |ApTalkPort is appletalk running on this port?
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beq ohNoItsATalk
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cmp #3 ; external port?
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bcs installExt
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dec a
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asl a
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asl a
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tax
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lda IntVectPrinter,x
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ora IntVectPrinter+2,x
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bne intInstalled
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* Turn off interrupts, so we don't get caught with our pants down
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php
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sei
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* install the new vector in our interrupt handler table
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lda #$5C
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sta IntVectPrinter,x
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ldy #SIMaddress
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lda [dataIn],y
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sta IntVectPrinter+1,x
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ldy #SIMaddress+1
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lda [dataIn],y
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sta IntVectPrinter+2,x
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* Now set OurSerFlag to indicate that we now have a handler on that
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* port
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ldx #%00000111
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ldy #SIMport
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lda [dataIn],y
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cmp #2
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beq port2
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ldx #%00111000
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port2 txa
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ora ourSerFlag
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sta ourSerFlag
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* And reset the firmware's SerFlag to indicate we're in control
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ldx #%11111000
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ldy #SIMport
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lda [dataIn],y
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cmp #SIMModemPort
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beq port2a
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ldx #%11000111
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port2a txa
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and >SerFlag
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sta >SerFlag
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* Restore interrupts
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plp
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okayno1 lda #SIMNoError
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bra goodbye
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ohNoItsATalk lda #SIMATalkActive
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bra goodbye
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notValidPort lda #SIMInvalidPort
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bra goodbye
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intInstalled lda #SIMAlreadyInst a handler is already installed
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goodbye anop
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ldy #Gerror
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sta [dataOut],y
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jmp exitRequest
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installExt dec a
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dec a
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dec a
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asl a
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asl a
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tax
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lda ExtVect1,x
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cmp ExtVect1+2,x
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bne intInstalled
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php
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sei
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lda #$5C
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sta ExtVect1,x
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ldy #SIMaddress
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lda [dataIn],y
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sta ExtVect1+1,x
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ldy #SIMaddress+1
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lda [dataIn],y
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sta ExtVect1+2,x
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plp
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bra okayno1
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doRemove anop
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* Calculate index into our handler list by quadrupling "port"
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ldy #SIMport
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lda [dataIn],y
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jsr ValidatePort
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bcs notValidPort
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cmp #3
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jcs removeExternal
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dec a
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asl a
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asl a
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tax
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* If there is no handler installed on that port, return an error
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lda IntVectPrinter,x
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ora IntVectPrinter+2,x
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beq noIntInstalled
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* If the handler on the port isn't the one the application claims,
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* return an error
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lda IntVectPrinter+1,x
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ldy #SIMaddress
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cmp [dataIn],y
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bne notSameVect
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lda IntVectPrinter+2,x
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ldy #SIMaddress+1
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cmp [dataIn],y
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bne notSameVect
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* otherwise, we're cool, so zero out the handler vector
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php
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sei
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lda #0
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sta IntVectPrinter,x
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sta IntVectPrinter+2,x
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* and modify serFlag to say "no handlers here, bub!"
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ldx #%11111000
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ldy #SIMport
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lda [dataIn],y
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cmp #SIMModemPort
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beq port3
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ldx #%11000111
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port3 txa
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and ourSerFlag
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sta ourSerFlag
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* We don't re-enable the firmware's SerFlag because there is nobody
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* installed now!
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plp
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noerrgoaway lda #0
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bra goodbye2
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notSameVect lda #SIMInvalidAddr
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jmp goodbye
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noIntInstalled lda #SIMNotInstalled
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goodbye2 ldy #Gerror
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sta [dataOut],y
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jmp exitRequest
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removeExternal anop
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dec a
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dec a
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dec a
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asl a
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asl a
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tax
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* if no handler is installed, signal an error
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lda ExtVect1,x
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ora ExtVect1+2,x
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beq noIntInstalled
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* if handler is not the same as is there, signal an error
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lda ExtVect1+1,x
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ldy #SIMaddress
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cmp [dataIn],y
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bne notSameVect
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lda ExtVect1+2,x
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ldy #SIMaddress+1
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cmp [dataIn],y
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bne notSameVect
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php
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sei
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lda #0
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sta ExtVect1,X
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sta ExtVect1+2,X
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plp
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bra noerrgoaway
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doVersion anop
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lda #Version
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ldy #Gversion
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sta [dataOut],y
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lda #SIMNoError
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ldy #Gerror
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sta [dataOut],y
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bra exitRequest
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exitRequestErr anop
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lda #0
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sta result
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bra exitRequest1
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exitRequest lda #$8000
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sta result
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exitRequest1 anop
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pld
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plb
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lda 2,s
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sta 12,s
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lda 1,s
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sta 11,s
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ply
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ply
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ply
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ply
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ply
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rtl
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END
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* Does not modify the port number in A
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ValidatePort START
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cmp #1
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bcc bad
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cmp #7
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bcs bad
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clc
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rts
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bad sec
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rts
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END
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GetROMVersion START
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pha
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pha
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pha
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pha
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lda #0
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pha
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pha
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pha
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pea $FE1F
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_FWEntry
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ply
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pla
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pla
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pla
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tya
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rts
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END
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;
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; This routine checks to see which serial port, if any, AppleTalk is using.
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; The routine sets a flag byte, ApTalkPort, and the accumulator to indicate
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; which port (if any) AppleTalk is using.
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; $0000 = AppleTalk is not using a serial port
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; $0001 = AppleTalk is using serial port 1 (printer port)
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; $0002 = AppleTalk is using serial port 2 (modem port)
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; Note: This method should be used under GS/OS only.
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;
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; Enter routine in native 16 bit mode
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;
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longa on
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longi on
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CheckPort START
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GetPort equ $8001 The .AppleTalk DStatus subcall to get
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; the port number AppleTalk is currently
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; using.
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phb save data bank
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phk data bank = code bank
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plb
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lda #$0001 start with device #1
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sta DIdevNum
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FindATDriver anop
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_DInfoGS DInfoParms call Dinfo
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bcs DIError stop searching if error
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lda DIdeviceIDNum
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cmp #$001D is it the AppleTalk main driver?
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beq ATDriverFound yes
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inc DIdevNum check the
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bra FindATDriver next device number
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ATDriverFound anop
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lda DIdevNum store device number
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sta DSdevNum in the DStatus parm list
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_DStatusGS DStatusParms call DStatus
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lda portNum get the port number
|
|
sta ApTalkPort
|
|
bra Exit
|
|
|
|
DIError anop
|
|
cmp #$0011 invalid device number, so the
|
|
beq NotFound AppleTalk main driver wasn't found
|
|
;
|
|
; Add your code to handle any other errors from DInfo here, because the
|
|
; end of the device list was not found.
|
|
|
|
NotFound stz ApTalkPort neither port is in use
|
|
bra Exit
|
|
|
|
Exit anop
|
|
lda ApTalkPort
|
|
plb restore data bank
|
|
rtl return to caller
|
|
|
|
ApTalkPort entry
|
|
ds 2 will be 0, 1, or 2
|
|
|
|
DInfoParms anop
|
|
dc i2'8' pCount = 8 parameters
|
|
DIdevNum dc i2'1' devNum
|
|
dc a4'NameBuffer' devName
|
|
ds 2 characteristics
|
|
ds 4 totalBlocks
|
|
ds 2 slotNum
|
|
ds 2 unitNum
|
|
ds 2 version
|
|
DIdeviceIDNum ds 2 deviceIDNum
|
|
|
|
NameBuffer anop
|
|
dc i2'31' Class 1 input string. Max Length=31
|
|
ds 33
|
|
|
|
DStatusParms anop
|
|
dc i2'5' pCount = 5 parameters
|
|
DSdevNum ds 2 devNum
|
|
dc i2'GetPort' statusCode = GetPort
|
|
dc a4'GetPortSList' statusList = GetPortSList
|
|
dc i4'2' requestCount = 2
|
|
ds 4 transferCount
|
|
|
|
GetPortSList anop the GetPort subcall's statusList
|
|
portNum ds 2 Port appletalk is using
|
|
dc i2'0'
|
|
END
|
|
|
|
SIMData DATA
|
|
SIMName str 'SerialIntrMgr~Entry~'
|
|
userID dc i2'0'
|
|
|
|
ourSerFlag dc i2'0'
|
|
SIMuserID dc i2'0'
|
|
|
|
IntVectPrinter ENTRY
|
|
dc i4'0'
|
|
IntVectModem dc i4'0'
|
|
ExtVect1 ENTRY
|
|
dc i4'0'
|
|
dc i4'0'
|
|
dc i4'0'
|
|
dc i4'0'
|
|
END
|
|
|
|
checkExternal START
|
|
* check first external vector
|
|
lda >ExtVect1
|
|
ora >ExtVect1+2
|
|
* beq checksecond ; originally beq checksecond
|
|
beq neither ; rather than beq neither,
|
|
jsl ExtVect1 ; but the ExtVect2 code seems
|
|
bcs gotit ; not to have been finished
|
|
*checksecond lda >ExtVect2
|
|
* ora >ExtVect2+2
|
|
* beq neither
|
|
* jsl ExtVect2
|
|
gotit rts
|
|
neither clc
|
|
rts
|
|
END
|