227 lines
6.7 KiB
Plaintext
227 lines
6.7 KiB
Plaintext
;**********************************************************************
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;
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; Copyrigth (C) 1984 Logitech. All Rights Reserved.
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;
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; Permission is hereby granted to registered users to use or
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; abstract the following program in the implementation of
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; customized versions. This permission does not include the
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; right to redistribute the source code of this program.
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;
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;
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; Common Definitions, Run-Time-Support for Modula-2 System (RTS).
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;
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; Version: 8086 processor, RAM-version
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; IBM-PC under PC-DOS 1.1 and 2.0
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;
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; Release: 0.1; June 25 '83
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; 0.2; Aug 03 '83
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; 0.2; Aug 09 '83 - for PCDOS 1.1
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; 1.0; Feb 29 '84 - add function 26H,priority in PD
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;
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; Copyright: LOGITECH SA.
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; CH-1143 Apples
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; Switzerland
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;
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; WARNING: This program has to be modified with utmost care!
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; Modula-2 programs contain calls to this
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; assembly part and therefore a user must
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; not modify those functions of this Run-Time
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; Support which are accessed through interrupt 'RTS_INT'.
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;
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;**********************************************************************
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TRUE EQU 0FFFFH
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FALSE EQU 0
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; The following definitions may be modified by a user,
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; to adapt the RTS to his particular system:
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RTS_INT EQU 228
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; Interrupt vector for main entry in RTS. This vector is used by the
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; compiler. If you modify it, you have to correct the corresponding
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; value in the compiler (contact LOGITECH).
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NBR_ISR EQU 8
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; Number of interrupts that can be used together at any one time.
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; This parameter allows to adapt the size of tables to the really
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; needed size. If you want to treat more than 16 interrupts together,
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; you have to write additional interrupt service routines, each of
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; which consists of 2 instructions: NOP, CALL COM_ISR. See the
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; existing ones (named ISR0 through ISR15).
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MAX_MEM_FOR_M2 EQU 0FFFFH ; In number of paragraphs.
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; With this constant you can limit the total amount of memory
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; that will be used for the Modula-2 programs. The space used
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; for the Run-Time-Support (the program you are now looking at)
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; and for the Resident Part are not included in this memory size.
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; If this number is larger than the available memory, the total
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; physical memory will be used. Usually this number is therefore
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; set to 0FFFFH.
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KEEP_COM EQU TRUE
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; This switch is used to specify if the transient portion of
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; COMMAND.COM of the DOS operating system has to be preserved
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; in memory or if it can be overwritten by the Modula program.
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; It is convenient to keep COMMAND.COM in memory, on systems
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; with little memory however, that portion may be used too.
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; Its size is 17K bytes.
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DUMP_ENABLE EQU TRUE
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; With this switch you can disable the Post Mortem Dump generation.
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; During development phase of a program this switch should be turned
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; on, to allow debugging. In case your Modula System runs only
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; debugged programs (typically when you distribute an application),
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; this switch can be turned off.
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; End of user-modifiable definitions.
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;******************************************************
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OS EQU 21H ; PC-DOS
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SP_INI_SIZE EQU 10 ; 10 bytes are needed to prepare
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; the stack of a new process.
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SP_RESERVE EQU 30H ; Reserve for 10 PUSHes + 2 roundings
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DEFAULT_FCB EQU 5CH ; inside the BASE_PAGE
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DEFAULT_DMA EQU 80H ; inside the BASE_PAGE
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NIL_SEG EQU 0FFFFh
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NIL_OFF EQU 0FH ; Offset value for a NIL pointer
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; Note: NIL = highest legal address
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NIL_CARD EQU 0FFFFH ; NIL value for a CARDINAL
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ProcessDescriptor STRUC
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; The type 'ProcessDescriptor' in module 'System'
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; must have the same structure!
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PD_AX dw 0
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PD_BX dw 0
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PD_CX dw 0
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PD_DX dw 0
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PD_SP dw 0
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PD_BP dw 0
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PD_SI dw 0
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PD_DI dw 0
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PD_DS dw 0
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PD_SS dw 0
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PD_ES dw 0
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PD_CS dw 0
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PD_IP dw 0
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PD_FLAGS dw 0 ; processor flags register
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PD_STATUS dw 0 ; program/process status
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PD_PROG_ID dw 1 ; default program id
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PD_AUX_ID dw 0 ; (not yet used)
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PD_SHARED_ID dw 1 ; prog id of last shared level
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PD_FATHER_PROC dd 0FFFF000Fh
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; Points to the 'father process' descriptor
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; The father process is the main process of
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; a program (overlay). The father itself has
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; no father (NIL value). This is used to
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; terminate the whole program if a 'son process'
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; terminates.
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PD_SP_LIM dw 0 ; stack (SP) limit value
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PD_PRIO_MASK dw 0 ; Interrupt mask for priority level of
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; this process
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PD_RET_SP dw 0 ; Return Stack Value
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PD_PROG_END dd 0 ; Program End Stack
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PD_INT_VECT dw 0 ; Interrupt Vector
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PD_OLD_ISR dd 0 ; Old addr of Int Service R.
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PD_INT_PROC dd 0 ; Addr, where to store the
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; interrupted process (in ISR)
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PD_HEAP_BASE dd 0 ; Heap Base (initially after code)
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PD_HEAP_TOP dd 0 ; Heap Top (= highwater marker)
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PD_MOD_TABLE dd 0FFFF000Fh ; Pointer to first Module Descriptor
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ProcessDescriptor ENDS
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NBR_FCT EQU 39
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; Number of existing functions in RTS
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RESET_FCT EQU 0
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HALT_FCT EQU 1
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TRANSFER_FCT EQU 2
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IOTRANSFER_FCT EQU 3
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NEWPROCESS_FCT EQU 4
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MON_ENTRY_FCT EQU 5
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MON_EXIT_FCT EQU 6
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LISTEN_FCT EQU 7
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SAVE_RET_FCT EQU 8
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REST_RET_FCT EQU 9
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SET_RET_FCT EQU 10
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TERMINATE_FCT EQU 11
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CASE_1_FCT EQU 12
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CASE_2_CARD_FCT EQU 13
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CASE_2_INT_FCT EQU 14
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CASE_3_CARD_FCT EQU 15
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CASE_3_INT_FCT EQU 16
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CASE_ERR_FCT EQU 17
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PAR_COPY_FCT EQU 18
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DYNPAR_COPY_FCT EQU 19
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STACK_CHECK_FCT EQU 20
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FREE_INT_FCT EQU 21
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WRT_STATUS_FCT EQU 22
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GET_PD_ADDRESS EQU 23
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ALLOC_HEAP_FCT EQU 24
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FCT_RET_ERR_FCT EQU 25
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NORM_ADDR_FCT EQU 26
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ADD_ADDR_FCT EQU 27
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ADD_ADDR_CARD_FCT EQU 28
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SUB_ADDR_FCT EQU 29
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SUB_ADDR_CARD_FCT EQU 30
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EQ_ADDR_FCT EQU 31
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GT_ADDR_FCT EQU 32
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GT_EQ_ADDR_FCT EQU 33
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CONV_ADDR_CARD_FCT EQU 34
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CARD_OVF_FCT EQU 35
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INTEGER_OVF_FCT EQU 36
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RANGE_ERR_FCT EQU 37
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PSP_PTR_FCT EQU 38
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;********************************************************
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;The Error-codes:
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;********************************************************
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; Correspond to the enumeration type 'Status' of
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; module 'System'.
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HIGHEST_ERR_CODE EQU 24
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NORMAL_CODE EQU 0
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WARNED_CODE EQU 1
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STOP_CODE EQU 2
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ASSERTED_CODE EQU 3
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HALT_CODE EQU 4
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CASE_ERR_CODE EQU 5
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STACK_OVF_CODE EQU 6
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HEAP_OVF_CODE EQU 7
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FCT_RET_ERR_CODE EQU 8
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ADDR_OVF_CODE EQU 9
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REAL_OVF_CODE EQU 10
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CARD_OVF_CODE EQU 11
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INTEGER_OVF_CODE EQU 12
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RANGE_ERR_CODE EQU 13
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ZERO_DIVIDE_CODE EQU 14
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PROCESS_END_CODE EQU 15
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LOAD_ERR_CODE EQU 16
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CALL_ERR_CODE EQU 17
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NO_PROG_CODE EQU 18
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NO_MODULE_CODE EQU 19
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INCOMPAT_MOD_CODE EQU 20
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BAD_FILE_CODE EQU 21
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; may be used in an application program
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ILL_INSTR_CODE EQU 22
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; possible with the 8087
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ILL_FCT_CODE EQU 23
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; illegal RTS-function or illegal
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; error-code
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INT_ERR_CODE EQU 24
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; attempt to treat too many
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; interrupts at the same time
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