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livingcomputermuseum.Darkstar/D/IOP/Source/IOPKernelDefs.asm,v
Josh Dersch bb52985dea Adding CP microcode and IOP 8085 sources.
2023-09-27 16:17:41 -07:00

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Dandelion Processor Program - Input/Output Processor
**********************************
* Development Kernel Definitions *
**********************************
Last modification by Roy RXO : September 27, 1981 4:22 PM
File: IOPKernelDefs.asm
Stored: [IRIS]<Workstation>Boot25>BootEProm.dm
Written by Roy RXO .
Dennis DEG : 2-Sep-84 15:27:39, add copyright notice.
}
{ Copyright (C) 1981 by Xerox Corporation. All rights reserved.}
; Modification History:
;
; Version 0.0 contains code to exercise the core system without the Alto.
; Version 1.0 contains the basic core system functions.
; - Created (March 30, 1979 3:00 PM)
; - EndOfRam defined at end of RAM bank 0 (April 27, 1979 4:06 PM)
; - This version for reversed Prom, PPI cmds (May 4, 1979 12:04 AM)
; - EndOfRam defined at end of RAM bank 7 (May 7, 1979 4:58 PM)
; - Upgraded to IOP Rev. B (fixed Prom, PPI cmds) (May 10, 1979 2:37 PM)
; Version 2.0 incorporates the CP control functions.
; - Created (November 5, 1979 10:29 PM)
; Version 2.1 incorporates the CP breakpoint code.
; - Created (November 26, 1979 11:09 PM)
; Version 2.2 contains updates for Rev. F IOP.
; - Created (March 5, 1980 1:53 PM)
; Version 2.3 contains new commands, misc. changes.
; - Created (May 16, 1980 11:56 AM)
; Version 2.4 contains new Burdock Tasks
; - Created (July 17, 1980 9:54 PM)
; Version 2.5 contains Boot HNH
; - Created (November 11, 1980 2:02 PM)
; Version 2.6 contains default boot
; - Created (January 6, 1981 3:38 PM)
; Version 2.7 contains new RST assignments
; - Created (January 20, 1981 12:03 PM)
;
;
; Command codes:
;
; Burdock -> IOP
; Kernel Commands (see description in IOPKernel-23.asm):
; Any modifications should also be reflected in kernel's CommandTable.
AltoStop equ 04H ; Command 4: Burdock halt (mouse halt)
DataForCP equ 14H ; Command 14: DataForBurdock command
; Cold start commands:
ColdStartGo equ 10H ; Proceed after ColdStart (no memtest)
ColdStartTest equ 15H ; Proceed after ColdStart (do memtest)
;
; IOP -> Burdock
IOPAlive equ 0FFH ; Cold Start acknowledge
KernelHere equ 0FEH ; Good Kernel Start
IOPBreak equ 0FDH ; IOP breakpoint
CPBreak equ 0FCH ; CP breakpoint
IOPHalt equ 0FBH ; Stopped after Burdock halt
IOPHaltError equ 0FAH ; Stopped after Burdock halt, but Burdock data
; is not DebugIntr
DataForBurdock equ 0F9H ; CP data for Burdock
BootMemError equ 0F8H ; Bad Kernel Start
; TimeOut constant.
TimeOutConst equ 0A000H ; Approx. .25 sec
; Maintenance Panel constants.
KernelHereCode equ 100 ; Kernel has started
ErrorBadIntr equ 101 ; Spurious RST 5.5 interrupt (Kernel 2.7 and later)
; CPU constants.
EnableRST55 equ 1EH ; Enable RST 5.5, disable 6.5, 7.5, clear 7.5 FF (SIM)
EnableRST65 equ 1CH ; Enable RST 6.5, RST 5.5, disable 7.5, clear 7.5 FF (SIM)
RSTMasks equ 7H ; RST masks in RIM input
RSTIntMasks equ 0FH ; RST, Int enable masks in RIM input
IntEnableBit equ 8H ; Interrupts Enabled bit in RIM input
EnMaskSet equ 8H ; EnableMaskSet bit for SIM
;ResetRST75 equ 10H ; Reset RST 7.5 FF bit for SIM
Res75EnMask equ ResetRST75+EnMaskSet ; Sum of above two for SIM
BootMode equ 1H ; Set BootMode flag in KernelFlags (bit 7)
NoBootMode equ 0H ; Clear BootMode, CPSave flags in KernelFlags
CPInSaveFull equ 80H ; CPInSaveFull flag in KernelFlags (bit 0)
CPOutSaveFull equ 40H ; CPOutSaveFull flag in KernelFlags (bit 1)
; CPKernel constants.
CPExitKernel equ 00H ; Command to CPKernel to exit CPKernel.
CPRefresh equ 01H ; Command to CPKernel to refresh.
; Memory configuration parameters (in SysDefs.asm)
;EndOfProm2K equ 7FFH ; 3777B
;EndOfProm8K equ 1FFFH ; 17777B
;EndOfProm equ ;EndOfProm8K ; Set up for 8K Prom
;StartOfRAM equ 2000H ; 20000B
;EndOfRAM1K equ 23FFH ; ;End of 1K RAM (21777B)
;EndOfRAM8K equ 3FFFH ; ;End of 8K RAM (37777B)
;EndOfRAM16K equ 5FFFH ; ;End of 16K RAM (57777B)
;EndOfRAM equ ;EndOfRAM16K ; Set up for 16K RAM
; Fixed addresses in Prom:
; Hook to get to Boot code:
BootGoProm equ 40H ; Boot version 2.5: Transfer location to Boot Code
;BootGo equ 600H ; Boot version 2.2: Transfer location to Boot Code
;BootGo equ 800H ; Boot version 2.1: Transfer location to Boot Code
; Transfer vectors for interrupts:
GoToBurdockCPIntr equ 2003H ; RST 5.5 Transfer location in Domino
GoToRS232CIntr equ 2006H ; RST 6.5 Transfer location in Domino
GoToFloppyIntr equ 2009H ; RST 7.5 Transfer location in Domino
GoToIOPBreakTrap equ 200CH ; RST 2 Transfer location in Domino (trap)
; Fixed Memory Above Stack: Machine State, stack underflow, data, breakpoint restart
; ***** Be Sure to Correct the following expressions as necessary *****
BRAreaSize equ 6 ;Breakpoint restart area
MachStateSize equ 13 ;Machine state area
DataSize equ 1+1+1+6+1+1+1 ;Data variable area (12 bytes)
StkUndSize equ 4 ;Stack Underflow Area
; Initial Stack pointer value
StackStart equ EndOfRAM-BRAreaSize-MachStateSize-DataSize-StkUndSize+1
; Stack area
Stack equ StackStart ;Stack Underflow Area
;
; Writable Data
;
DataArea equ StackStart+StkUndSize ;start of data area
CPDataMode equ DataArea ; Transparent mode for interrupt (1 byte)
WhyKernel equ DataArea+1 ; Temp for reason entered kernel (1 byte)
CSCount equ DataArea+2 ; Control store count (1 byte)
CSBuffer equ DataArea+3 ; Control store buffering (6 bytes)
KernelFlags equ DataArea+9 ; Kernel Flags (1 byte):
; bit 0: CPInSaveFull
; bit 1: CPOutSaveFull
; bit 7: BootMode
CPInSave equ DataArea+10 ; Save area for CPIn (IOPOData) (1 byte)
CPOutSave equ DataArea+11 ; Save area for CPOut (IOPIData) (1 byte)
SaveArea equ DataArea+DataSize ; start of machine state save area
SaveFLG equ SaveArea ;Flags S, Z, X, AC, X, P, X, Carry
SaveAC equ SaveArea+1 ;Register Save Locations
SaveC equ SaveArea+2
SaveB equ SaveArea+3
SaveE equ SaveArea+4
SaveD equ SaveArea+5
SaveL equ SaveArea+6
SaveH equ SaveArea+7
SavePC equ SaveArea+8 ;More State
SaveSP equ SaveArea+10
SaveRIM equ SaveArea+12 ;Interrupt Mask (page 3-23)
; Breakpoint Restart Area (6 Bytes)
;
BRArea equ SaveArea+13
;
; MAP of high RAM.
; Values for 8K RAM 16K RAM
; User stack start 3FCE 5FCE Stack pointer value
; Kernel stack start 3FDE 5FDE Stack pointer value
; CPDataMode 3FE1 5FE1 DataArea
; WhyKernel 3FE2 5FE2
; CSCount 3FE3 5FE3
; CSBuffer 3FE4 5FE4
; KernelFlags 3FEA 5FEA
; CPInSave 3FEB 5FEB
; CPOutSave 3FEC 5FEC
; SaveFLG 3FED 5FED SaveArea
; SaveAC 3FEE 5FEE
; SaveC 3FEF 5FEF
; SaveB 3FF0 5FF0
; SaveE 3FF1 5FF1
; SaveD 3FF2 5FF2
; SaveL 3FF3 5FF3
; SaveH 3FF4 5FF4
; SavePC 3FF5 5FF5
; SaveSP 3FF7 5FF7
; SaveRIM 3FF9 5FF9
; BRArea 3FFA 5FFA
; End BRArea 3FFF 5FFF
END KernelDefs
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