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simh-testsetgenerator/HP2100/hp2100_defs.h
Mark Pizzolato 90e9c2f4a0 HP2100: HP 2100 release 26 
See HP2100/hp2100_release.txt for details of the release
2017-05-01 15:47:33 -07:00

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/* hp2100_defs.h: HP 2100 System architectural declarations
Copyright (c) 1993-2016, Robert M. Supnik
Copyright (c) 2017 J. David Bryan
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of Robert M Supnik shall not
be used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from Robert M Supnik.
10-Jan-17 JDB Added architectural constants
05-Aug-16 JDB Removed PC_Global renaming; P register is now "PR"
13-May-16 JDB Modified for revised SCP API function parameter types
19-Jun-15 JDB Conditionally use PC_Global for PC for version 4.0 and on
30-Dec-14 JDB Added S-register parameters to ibl_copy, more IBL constants
28-Dec-14 JDB Changed suppression from #pragma GCC to #pragma clang
05-Feb-13 JDB Added declaration for hp_fprint_stopped
18-Mar-13 JDB Added "-Wdangling-else" to the suppression pragmas
Removed redundant extern declarations
14-Mar-13 MP Changed guard macro name to avoid reserved namespace
14-Dec-12 JDB Added "-Wbitwise-op-parentheses" to the suppression pragmas
12-May-12 JDB Added pragmas to suppress logical operator precedence warnings
10-Feb-12 JDB Added hp_setsc, hp_showsc functions to support SC modifier
28-Mar-11 JDB Tidied up signal handling
29-Oct-10 JDB DMA channels renamed from 0,1 to 1,2 to match documentation
27-Oct-10 JDB Revised I/O signal enum values for concurrent signals
Revised I/O macros for new signal handling
09-Oct-10 JDB Added DA and DC device select code assignments
07-Sep-08 JDB Added POLL_FIRST to indicate immediate connection attempt
15-Jul-08 JDB Rearranged declarations with hp2100_cpu.h
26-Jun-08 JDB Rewrote device I/O to model backplane signals
25-Jun-08 JDB Added PIF device
17-Jun-08 JDB Declared fmt_char() function
26-May-08 JDB Added MPX device
24-Apr-08 JDB Added I_MRG_I, I_JSB, I_JSB_I, and I_JMP instruction masks
14-Apr-08 JDB Changed TMR_MUX to TMR_POLL for idle support
Added POLLMODE, sync_poll() declaration
Added I_MRG, I_ISZ, I_IOG, I_STF, and I_SFS instruction masks
07-Dec-07 JDB Added BACI device
10-Nov-07 JDB Added 16/32-bit unsigned-to-signed conversions
11-Jan-07 JDB Added 12578A DMA byte packing to DMA structure
28-Dec-06 JDB Added CRS backplane signal as I/O pseudo-opcode
Added DMASK32 32-bit mask value
21-Dec-06 JDB Changed MEM_ADDR_OK for 21xx loader support
12-Sep-06 JDB Define NOTE_IOG to recalc interrupts after instr exec
Rename STOP_INDINT to NOTE_INDINT (not a stop condition)
30-Dec-04 JDB Added IBL_DS_HEAD head number mask
19-Nov-04 JDB Added STOP_OFFLINE, STOP_PWROFF stop codes
25-Apr-04 RMS Added additional IBL definitions
Added DMA EDT I/O pseudo-opcode
25-Apr-03 RMS Revised for extended file support
24-Oct-02 RMS Added indirect address interrupt
08-Feb-02 RMS Added DMS definitions
01-Feb-02 RMS Added terminal multiplexor support
16-Jan-02 RMS Added additional device support
30-Nov-01 RMS Added extended SET/SHOW support
15-Oct-00 RMS Added dynamic device numbers
14-Apr-99 RMS Changed t_addr to unsigned
The [original] author gratefully acknowledges the help of Jeff Moffat in
answering questions about the HP2100; and of Dave Bryan in adding features
and correcting errors throughout the simulator.
This file provides the general declarations used throughout the HP 2100
simulator. It is required by all modules.
-----------------------------------------------------
Implementation Note -- Compiling the Simulator as C++
-----------------------------------------------------
Although simulators are written in C, the SIMH project encourages developers
to compile them with a C++ compiler to obtain the more careful type checking
provided. To obtain successful compilations, the simulator must be written
in the subset of C that is also valid C++. Using valid C features beyond
that subset, as the HP 2100 simulator does, will produce C++ compiler errors.
The standard C features used by the simulator that prevent error-free C++
compilation are:
1. Incomplete types.
In C, mutually recursive type definitions are allowed by the use of
incomplete type declarations, such as "DEVICE ms_dev;" followed later by
"DEVICE ms_dev {...};". Several HP device simulators use this feature to
place a pointer to the device structure in the "desc" field of an MTAB
array element, typically when the associated validation or display
routine handles multiple devices. As the DEVICE contains a pointer to
the MTAB array, and an MTAB array element contains a pointer to the
DEVICE, the definitions are mutually recursive, and incomplete types are
employed. C++ does not permit incomplete types.
2. Implicit conversion of ints to enums.
In C, enumeration types are compatible with integer types, and its
members are constants having type "int". As such, they are semantically
equivalent to and may be used interchangeably with integers. For the
developer, though, C enumerations have some advantages. In particular,
the compiler may check a "switch" statement to ensure that all of the
enumeration cases are covered. Also, a mathematical set may be modeled
by an enumeration type with disjoint enumerator values, with the bitwise
integer OR and AND operators modeling the set union and intersection
operations. The latter has direct support in the "gdb" debugger, which
will display an enumerated type value as a union of the various
enumerators. The HP simulator makes extensive use of both features to
model hardware signal buses (e.g., INBOUND_SET, OUTBOUND_SET) and so
performs bitwise integer operations on the enumerations to model signal
assertion and denial. In C++, implicit conversion from enumerations to
integers is allowed, but conversion from integers to enumerations is
illegal without explicit casts. Therefore, the idiom employed by the
simulator to assert a signal (e.g., "outbound_signals |= INTREQ") is
rejected by the C++ compiler.
3. Implicit increment operations on enums.
Because enums are compatible with integers in C, no special enumerator
increment operator is provided. To cycle through the range of an
enumeration type, e.g. in a "for" statement, the standard integer
increment operator, "++", is used. In C++, the "++" operator must be
overloaded with a version specific to the enumeration type; applying the
integer "++" to an enumeration is illegal.
4. Use of C++ keywords as variable names.
C++ reserves a number of additional keywords beyond those reserved by C.
Use of any of these keywords as a variable or type name is legal C but
illegal C++. The HP simulator uses variables named "class" and
"operator", which are keywords in C++.
The HP simulator is written in ISO standard C and will compile cleanly with a
compiler implementing the 1999 C standard. Compilation as C++ is not a goal
of the simulator and cannot work, given the incompatibilities listed above.
*/
#ifndef HP2100_DEFS_H_
#define HP2100_DEFS_H_ 0
#include "sim_rev.h"
#include "sim_defs.h"
/* The following pragmas quell clang and Microsoft Visual C++ warnings that are
on by default but should not be, in my opinion. They warn about the use of
perfectly valid code and require the addition of redundant parentheses and
braces to silence them. Rather than clutter up the code with scores of extra
symbols that, in my view, make the code harder to read and maintain, I elect
to suppress these warnings.
VC++ 2008 warning descriptions:
- 4114: "same type qualifier used more than once" [legal per C99]
- 4554: "check operator precedence for possible error; use parentheses to
clarify precedence"
- 4996: "function was declared deprecated"
*/
#if defined (__clang__)
#pragma clang diagnostic ignored "-Wlogical-op-parentheses"
#pragma clang diagnostic ignored "-Wbitwise-op-parentheses"
#pragma clang diagnostic ignored "-Wshift-op-parentheses"
#pragma clang diagnostic ignored "-Wdangling-else"
#elif defined (_MSC_VER)
#pragma warning (disable: 4114 4554 4996)
#endif
/* Simulator stop and notification codes */
#define STOP_RSRV 1 /* must be 1 */
#define STOP_IODV 2 /* must be 2 */
#define STOP_HALT 3 /* HALT */
#define STOP_IBKPT 4 /* breakpoint */
#define STOP_IND 5 /* indirect loop */
#define NOTE_INDINT 6 /* indirect intr */
#define STOP_NOCONN 7 /* no connection */
#define STOP_OFFLINE 8 /* device offline */
#define STOP_PWROFF 9 /* device powered off */
#define NOTE_IOG 10 /* I/O instr executed */
/* Modifier validation identifiers */
#define MTAB_XDV (MTAB_XTD | MTAB_VDV)
#define MTAB_XUN (MTAB_XTD | MTAB_VUN)
/* Architectural constants.
These macros specify the width, sign location, value mask, and minimum and
maximum signed and unsigned values for the data sizes supported by the
simulator. In addition, masks for 16-bit and 32-bit overflow are defined (an
overflow is indicated if the masked bits are not all ones or all zeros).
The HP_WORD type is used to declare variables that represent 16-bit registers
or buses in hardware.
*/
typedef uint16 HP_WORD; /* HP 16-bit data word representation */
#define R_MASK 0177777u /* 16-bit register mask */
#define D4_WIDTH 4 /* 4-bit data bit width */
#define D4_MASK 0017u /* 4-bit data mask */
#define D8_WIDTH 8 /* 8-bit data bit width */
#define D8_MASK 0377u /* 8-bit data mask */
#define D8_UMAX 0377u /* 8-bit unsigned maximum value */
#define D8_SMAX 0177u /* 8-bit signed maximum value */
#define D8_SMIN 0200u /* 8-bit signed minimum value */
#define D8_SIGN 0200u /* 8-bit sign */
#define D16_WIDTH 16 /* 16-bit data bit width */
#define D16_MASK 0177777u /* 16-bit data mask */
#define D16_UMAX 0177777u /* 16-bit unsigned maximum value */
#define D16_SMAX 0077777u /* 16-bit signed maximum value */
#define D16_SMIN 0100000u /* 16-bit signed minimum value */
#define D16_SIGN 0100000u /* 16-bit sign */
#define D32_WIDTH 32 /* 32-bit data bit width */
#define D32_MASK 037777777777u /* 32-bit data mask */
#define D32_UMAX 037777777777u /* 32-bit unsigned maximum value */
#define D32_SMAX 017777777777u /* 32-bit signed maximum value */
#define D32_SMIN 020000000000u /* 32-bit signed minimum value */
#define D32_SIGN 020000000000u /* 32-bit sign */
#define D48_WIDTH 48 /* 48-bit data bit width */
#define D48_MASK 07777777777777777uL /* 48-bit data mask */
#define D48_UMAX 07777777777777777uL /* 48-bit unsigned maximum value */
#define D48_SMAX 03777777777777777uL /* 48-bit signed maximum value */
#define D48_SMIN 04000000000000000uL /* 48-bit signed minimum value */
#define D48_SIGN 04000000000000000uL /* 48-bit sign */
#define D64_WIDTH 64 /* 64-bit data bit width */
#define D64_MASK 01777777777777777777777uL /* 64-bit data mask */
#define D64_UMAX 01777777777777777777777uL /* 64-bit unsigned maximum value */
#define D64_SMAX 00777777777777777777777uL /* 64-bit signed maximum value */
#define D64_SMIN 01000000000000000000000uL /* 64-bit signed minimum value */
#define D64_SIGN 01000000000000000000000uL /* 64-bit sign */
#define S16_OVFL_MASK ((uint32) D16_UMAX << D16_WIDTH | \
D16_SIGN) /* 16-bit signed overflow mask */
#define S32_OVFL_MASK ((t_uint64) D32_UMAX << D32_WIDTH | \
D32_SIGN) /* 32-bit signed overflow mask */
/* Memory constants */
#define OF_WIDTH 10 /* offset bit width */
#define OF_MASK ((1u << OF_WIDTH) - 1) /* offset mask (2 ** 10 - 1) */
#define OF_MAX ((1u << OF_WIDTH) - 1) /* offset maximum (2 ** 10 - 1) */
#define PG_WIDTH 10 /* page bit width */
#define PG_MASK ((1u << PG_WIDTH) - 1) /* page mask (2 ** 10 - 1) */
#define PG_MAX ((1u << PG_WIDTH) - 1) /* page maximum (2 ** 10 - 1) */
#define LA_WIDTH 15 /* logical address bit width */
#define LA_MASK ((1u << LA_WIDTH) - 1) /* logical address mask (2 ** 15 - 1) */
#define LA_MAX ((1u << LA_WIDTH) - 1) /* logical address maximum (2 ** 15 - 1) */
#define PA_WIDTH 20 /* physical address bit width */
#define PA_MASK ((1u << PA_WIDTH) - 1) /* physical address mask (2 ** 20 - 1) */
#define PA_MAX ((1u << PA_WIDTH) - 1) /* physical address maximum (2 ** 20 - 1) */
#define DV_WIDTH 16 /* data value bit width */
#define DV_MASK ((1u << DV_WIDTH) - 1) /* data value mask (2 ** 16 - 1) */
#define DV_SIGN ( 1u << (DV_WIDTH - 1)) /* data value sign (2 ** 15) */
#define DV_UMAX ((1u << DV_WIDTH) - 1) /* data value unsigned maximum (2 ** 16 - 1) */
#define DV_SMAX ((1u << (DV_WIDTH - 1)) - 1) /* data value signed maximum (2 ** 15 - 1) */
/* Portable conversions.
SIMH is written with the assumption that the defined-size types (e.g.,
uint16) are at least the required number of bits but may be larger.
Conversions that otherwise would make inherent size assumptions must instead
be coded explicitly. For example, doing:
negative_value_32 = (int32) negative_value_16;
...will not guarantee that bits 0-15 of "negative_value_32" are ones, whereas
the supplied sign-extension macro will.
The conversions available are:
- SEXT8 -- int8 sign-extended to int32
- SEXT16 -- int16 sign-extended to int32
- NEG16 -- int8 negated
- NEG16 -- int16 negated
- NEG32 -- int32 negated
- INT16 -- uint16 to int16
- INT32 -- uint32 to int32
Implementation notes:
1. The routines assume that 16-bit values are masked to exactly 16 bits
before invoking.
*/
#define SEXT8(x) (int32) ((x) & D8_SIGN ? (x) | ~D8_MASK : (x))
#define SEXT16(x) (int32) ((x) & D16_SIGN ? (x) | ~D16_MASK : (x))
#define NEG8(x) ((~(x) + 1) & D8_MASK)
#define NEG16(x) ((~(x) + 1) & D16_MASK)
#define NEG32(x) ((~(x) + 1) & D32_MASK)
#define INT16(u) ((u) > D16_SMAX ? (-(int16) (D16_UMAX - (u)) - 1) : (int16) (u))
#define INT32(u) ((u) > D32_SMAX ? (-(int32) (D32_UMAX - (u)) - 1) : (int32) (u))
/* Byte accessors.
These macros extract the upper and lower bytes from a word and form a word
from upper and lower bytes. Replacement of a byte within a word is also
provided, as is an enumeration type that defines byte selection.
The accessors are:
- UPPER_BYTE -- return the byte from the upper position of a word value
- LOWER_BYTE -- return the byte from the lower position of a word value
- TO_WORD -- return a word with the specified upper and lower bytes
- REPLACE_UPPER -- replace the upper byte of the word value
- REPLACE_LOWER -- replace the lower byte of the word value
*/
typedef enum {
upper, /* upper byte selected */
lower /* lower byte selected */
} BYTE_SELECTOR;
#define UPPER_BYTE(w) (uint8) ((w) >> D8_WIDTH & D8_MASK)
#define LOWER_BYTE(w) (uint8) ((w) & D8_MASK)
#define TO_WORD(u,l) (HP_WORD) (((u) & D8_MASK) << D8_WIDTH | (l) & D8_MASK)
#define REPLACE_UPPER(w,b) ((w) & D8_MASK | ((b) & D8_MASK) << D8_WIDTH)
#define REPLACE_LOWER(w,b) ((w) & D8_MASK << D8_WIDTH | (b) & D8_MASK)
/* Double-word accessors */
#define UPPER_WORD(d) (HP_WORD) ((d) >> D16_WIDTH & D16_MASK)
#define LOWER_WORD(d) (HP_WORD) ((d) & D16_MASK)
#define TO_DWORD(u,l) ((uint32) (u) << D16_WIDTH | (l))
/* Portable conversions (sign-extension, unsigned-to-signed) */
#define SEXT(x) ((int32) (((x) & SIGN)? ((x) | ~DMASK): ((x) & DMASK)))
/* Memory */
#define MEMSIZE (cpu_unit.capac) /* actual memory size */
#define VA_N_SIZE 15 /* virtual addr size */
#define VASIZE (1 << VA_N_SIZE)
#define VAMASK 077777 /* virt addr mask */
#define PA_N_SIZE 20 /* phys addr size */
#define PASIZE (1 << PA_N_SIZE)
#define PAMASK (PASIZE - 1) /* phys addr mask */
/* Architectural constants */
#define SIGN32 020000000000 /* 32b sign */
#define DMASK32 037777777777 /* 32b data mask/maximum value */
#define DMAX32 017777777777 /* 32b maximum signed value */
#define SIGN 0100000 /* 16b sign */
#define DMASK 0177777 /* 16b data mask/maximum value */
#define DMAX 0077777 /* 16b maximum signed value */
#define DMASK8 0377 /* 8b data mask/maximum value */
/* Timers */
#define TMR_CLK 0 /* clock */
#define TMR_POLL 1 /* input polling */
#define POLL_RATE 100 /* poll 100 times per second */
#define POLL_FIRST 1 /* first poll is "immediate" */
#define POLL_WAIT 15800 /* initial poll ~ 10 msec. */
typedef enum { INITIAL, SERVICE } POLLMODE; /* poll synchronization modes */
/* I/O instruction sub-opcodes */
#define soHLT 0 /* halt */
#define soFLG 1 /* set/clear flag */
#define soSFC 2 /* skip on flag clear */
#define soSFS 3 /* skip on flag set */
#define soMIX 4 /* merge into A/B */
#define soLIX 5 /* load into A/B */
#define soOTX 6 /* output from A/B */
#define soCTL 7 /* set/clear control */
/* I/O devices - fixed select code assignments */
#define CPU 000 /* interrupt control */
#define OVF 001 /* overflow */
#define DMALT1 002 /* DMA 1 alternate */
#define DMALT2 003 /* DMA 2 alternate */
#define PWR 004 /* power fail */
#define PRO 005 /* parity/mem protect */
#define DMA1 006 /* DMA channel 1 */
#define DMA2 007 /* DMA channel 2 */
/* I/O devices - variable select code assignment defaults */
#define PTR 010 /* 12597A-002 paper tape reader */
#define TTY 011 /* 12531C teleprinter */
#define PTP 012 /* 12597A-005 paper tape punch */
#define CLK 013 /* 12539C time-base generator */
#define LPS 014 /* 12653A line printer */
#define LPT 015 /* 12845A line printer */
#define MTD 020 /* 12559A data */
#define MTC 021 /* 12559A control */
#define DPD 022 /* 12557A data */
#define DPC 023 /* 12557A control */
#define DQD 024 /* 12565A data */
#define DQC 025 /* 12565A control */
#define DRD 026 /* 12610A data */
#define DRC 027 /* 12610A control */
#define MSD 030 /* 13181A data */
#define MSC 031 /* 13181A control */
#define IPLI 032 /* 12566B link in */
#define IPLO 033 /* 12566B link out */
#define DS 034 /* 13037A control */
#define BACI 035 /* 12966A Buffered Async Comm Interface */
#define MPX 036 /* 12792A/B/C 8-channel multiplexer */
#define PIF 037 /* 12620A/12936A Privileged Interrupt Fence */
#define MUXL 040 /* 12920A lower data */
#define MUXU 041 /* 12920A upper data */
#define MUXC 042 /* 12920A control */
#define DI_DA 043 /* 12821A Disc Interface with Amigo disc devices */
#define DI_DC 044 /* 12821A Disc Interface with CS/80 disc and tape devices */
#define OPTDEV 002 /* start of optional devices */
#define CRSDEV 006 /* start of devices that receive CRS */
#define VARDEV 010 /* start of variable assignments */
#define MAXDEV 077 /* end of select code range */
/* IBL assignments */
#define IBL_V_SEL 14 /* ROM select <15:14> */
#define IBL_M_SEL 03
#define IBL_PTR 0000000 /* ROM 0: 12992K paper tape reader (PTR) */
#define IBL_DP 0040000 /* ROM 1: 12992A 7900 disc (DP) */
#define IBL_DQ 0060000 /* ROM 1: 12992A 2883 disc (DQ) */
#define IBL_MS 0100000 /* ROM 2: 12992D 7970 tape (MS) */
#define IBL_DS 0140000 /* ROM 3: 12992B 7905/06/20/25 disc (DS) */
#define IBL_MAN 0010000 /* RPL/manual boot <13:12> */
#define IBL_V_DEV 6 /* select code <11:6> */
#define IBL_OPT 0000070 /* options in <5:3> */
#define IBL_DP_REM 0000001 /* DP removable <0:0> */
#define IBL_DS_HEAD 0000003 /* DS head number <1:0> */
#define IBL_LNT 64 /* boot ROM length in words */
#define IBL_MASK (IBL_LNT - 1) /* boot length mask */
#define IBL_DPC (IBL_LNT - 2) /* DMA ctrl word */
#define IBL_END (IBL_LNT - 1) /* last location */
#define IBL_S_CLR 0000000 /* ibl_copy mask to clear the S register */
#define IBL_S_NOCLR 0177777 /* ibl_copy mask to preserve the S register */
#define IBL_S_NOSET 0000000 /* ibl_copy mask to preserve the S register */
#define IBL_SET_SC(s) ((s) << IBL_V_DEV) /* position the select code in the S register */
typedef uint16 BOOT_ROM [IBL_LNT]; /* boot ROM data */
/* I/O backplane signals.
The IOSIGNAL declarations mirror the hardware I/O backplane signals. A set
of one or more signals forms an IOCYCLE that is sent to a device IOHANDLER
for action. The CPU and DMA dispatch one signal set to the target device
handler per I/O cycle. A CPU cycle consists of either one or two signals; if
present, the second signal will be CLF. A DMA cycle consists of from two to
five signals. In addition, a front-panel PRESET or power-on reset dispatches
two or three signals, respectively.
In hardware, signals are assigned to one or more specific I/O T-periods, and
some signals are asserted concurrently. For example, a programmed STC sc,C
instruction asserts the STC and CLF signals together in period T4. Under
simulation, signals are ORed to form an I/O cycle; in this example, the
signal handler would receive an IOCYCLE value of "ioSTC | ioCLF".
Hardware allows parallel action for concurrent signals. Under simulation, a
"concurrent" set of signals is processed sequentially by the signal handler
in order of ascending numerical value. Although assigned T-periods differ
between programmed I/O and DMA I/O cycles, a single processing order is used.
The order of execution generally follows the order of T-period assertion,
except that ioSIR is processed after all other signals that may affect the
interrupt request chain.
Implementation notes:
1. The ioCLF signal must be processed after ioSFS/ioSFC to ensure that a
true skip test generates ioSKF before the flag is cleared, and after
ioIOI/ioIOO/ioSTC/ioCLC to meet the requirement that executing an
instruction having the H/C bit set is equivalent to executing the same
instruction with the H/C bit clear and then a CLF instruction.
2. The ioSKF signal is never sent to an I/O handler. Rather, it is returned
from the handler if the SFC or SFS condition is true. If the condition
is false, ioNONE is returned instead. As these two values are returned
in the 16-bit data portion of the returned value, their assigned values
must be <= 100000 octal.
3. An I/O handler will receive ioCRS as a result of a CLC 0 instruction,
ioPOPIO and ioCRS as a result of a RESET command, and ioPON, ioPOPIO, and
ioCRS as a result of a RESET -P command.
4. An I/O handler will receive ioNONE when a HLT instruction is executed
that has the H/C bit clear (i.e., no CLF generated).
5. In hardware, the SIR signal is generated unconditionally every T5 period
to time the setting of the IRQ flip-flop. Under simulation, ioSIR
indicates that the I/O handler must set the PRL, IRQ, and SRQ signals as
required by the interface logic. ioSIR must be included in the I/O cycle
if any of the flip-flops affecting these signals are changed and the
interface supports interrupts or DMA transfers.
6. In hardware, the ENF signal is unconditionally generated every T2 period
to time the setting of the flag flip-flop and to reset the IRQ flip-flop.
If the flag buffer flip-flip is set, then flag will be set by ENF. If
the flag buffer is clear, ENF will not affect flag. Under simulation,
ioENF is sent to set the flag buffer and flag flip-flops. For those
interfaces where this action is identical to that provided by STF, the
ioENF handler may simply fall into the ioSTF handler.
7. In hardware, the PON signal is asserted continuously while the CPU is
operating. Under simulation, ioPON is asserted only at simulator
initialization or when processing a RESET -P command.
*/
typedef enum { ioNONE = 0000000, /* -- -- -- -- -- no signal asserted */
ioPON = 0000001, /* T2 T3 T4 T5 T6 power on normal */
ioENF = 0000002, /* T2 -- -- -- -- enable flag */
ioIOI = 0000004, /* -- -- T4 T5 -- I/O data input (CPU)
T2 T3 -- -- -- I/O data input (DMA) */
ioIOO = 0000010, /* -- T3 T4 -- -- I/O data output */
ioSKF = 0000020, /* -- T3 T4 T5 -- skip on flag */
ioSFS = 0000040, /* -- T3 T4 T5 -- skip if flag is set */
ioSFC = 0000100, /* -- T3 T4 T5 -- skip if flag is clear */
ioSTC = 0000200, /* -- -- T4 -- -- set control flip-flop (CPU)
-- T3 -- -- -- set control flip-flop (DMA) */
ioCLC = 0000400, /* -- -- T4 -- -- clear control flip-flop (CPU)
-- T3 T4 -- -- clear control flip-flop (DMA) */
ioSTF = 0001000, /* -- T3 -- -- -- set flag flip-flop */
ioCLF = 0002000, /* -- -- T4 -- -- clear flag flip-flop (CPU)
-- T3 -- -- -- clear flag flip-flop (DMA) */
ioEDT = 0004000, /* -- -- T4 -- -- end data transfer */
ioCRS = 0010000, /* -- -- -- T5 -- control reset */
ioPOPIO = 0020000, /* -- -- -- T5 -- power-on preset to I/O */
ioIAK = 0040000, /* -- -- -- -- T6 interrupt acknowledge */
ioSIR = 0100000 } IOSIGNAL; /* -- -- -- T5 -- set interrupt request */
typedef uint32 IOCYCLE; /* a set of signals forming one I/O cycle */
#define IOIRQSET (ioSTC | ioCLC | ioENF | \
ioSTF | ioCLF | ioIAK | \
ioCRS | ioPOPIO | ioPON) /* signals that may affect interrupt state */
/* Flip-flops */
typedef enum {
CLEAR = 0, /* the flip-flop is clear */
SET = 1 /* the flip-flop is set */
} FLIP_FLOP;
#define TOGGLE(ff) ff = (FLIP_FLOP) (ff ^ 1) /* toggle a flip-flop variable */
#define D_FF(b) (FLIP_FLOP) ((b) != 0) /* use a Boolean expression for a D flip-flop */
/* I/O structures */
typedef struct dib DIB; /* incomplete definition */
typedef uint32 IOHANDLER (DIB *dibptr, /* I/O signal handler prototype */
IOCYCLE signal_set,
uint32 stat_data);
struct dib { /* Device information block */
IOHANDLER *io_handler; /* pointer to device's I/O signal handler */
uint32 select_code; /* device's select code */
uint32 card_index; /* device's card index for state variables */
};
/* I/O signal and status macros.
The following macros are useful in I/O signal handlers and unit service
routines. The parameter definition symbols employed are:
I = an IOCYCLE value
E = a t_stat error status value
D = a uint16 data value
C = a uint32 combined status and data value
P = a pointer to a DIB structure
B = a Boolean test value
Implementation notes:
1. The IONEXT macro isolates the next signal in sequence to process from the
I/O cycle I.
2. The IOADDSIR macro adds an ioSIR signal to the I/O cycle I if it
contains signals that might change the interrupt state.
3. The IORETURN macro forms the combined status and data value to be
returned by a handler from the t_stat error code E and the 16-bit data
value D.
4. The IOSTATUS macro isolates the t_stat error code from a combined status
and data value value C.
5. The IODATA macro isolates the 16-bit data value from a combined status
and data value value C.
6. The IOPOWERON macro calls signal handler P->H with DIB pointer P to
process a power-on reset action.
7. The IOPRESET macro calls signal handler P->H with DIB pointer P to
process a front-panel PRESET action.
8. The IOERROR macro returns t_stat error code E from a unit service routine
if the Boolean test B is true.
*/
#define IONEXT(I) (IOSIGNAL) ((I) & (IOCYCLE) (- (int32) (I))) /* extract next I/O signal to handle */
#define IOADDSIR(I) ((I) & IOIRQSET ? (I) | ioSIR : (I)) /* add SIR if IRQ state might change */
#define IORETURN(E,D) ((uint32) ((E) << 16 | (D) & DMASK)) /* form I/O handler return value */
#define IOSTATUS(C) ((t_stat) ((C) >> 16) & DMASK) /* extract I/O status from combined value */
#define IODATA(C) ((uint16) ((C) & DMASK)) /* extract data from combined value */
#define IOPOWERON(P) (P)->io_handler ((P), ioPON | ioPOPIO | ioCRS, 0) /* send power-on signals to handler */
#define IOPRESET(P) (P)->io_handler ((P), ioPOPIO | ioCRS, 0) /* send PRESET signals to handler */
#define IOERROR(B,E) ((B) ? (E) : SCPE_OK) /* stop on I/O error if enabled */
/* I/O signal logic macros.
The following macros implement the logic for the SKF, PRL, IRQ, and SRQ
signals. Both standard and general logic macros are provided. The parameter
definition symbols employed are:
S = a uint32 select code value
B = a Boolean test value
N = a name of a structure containing the standard flip-flops
Implementation notes:
1. The setSKF macro sets the Skip on Flag signal in the return data value if
the Boolean value B is true.
2. The setPRL macro sets the Priority Low signal for select code S to the
Boolean value B.
3. The setIRQ macro sets the Interrupt Request signal for select code S to
the Boolean value B.
4. The setSRQ macro sets the Service Request signal for select code S to the
Boolean value B.
5. The PRL macro returns the Priority Low signal for select code S as a
Boolean value.
6. The IRQ macro returns the Interrupt Request signal for select code S as a
Boolean value.
7. The SRQ macro returns the Service Request signal for select code S as a
Boolean value.
8. The setstdSKF macro sets Skip on Flag signal in the return data value if
the flag state in structure N matches the current skip test condition.
9. The setstdPRL macro sets the Priority Low signal for the select code
referenced by "dibptr" using the standard logic and the control and flag
states in structure N.
10. The setstdIRQ macro sets the Interrupt Request signal for the select code
referenced by "dibptr" using the standard logic and the control, flag,
and flag buffer states in structure N.
11. The setstdSRQ macro sets the Service Request signal for the select code
referenced by "dibptr" using the standard logic and the flag state in
structure N.
*/
#define BIT_V(S) ((S) & 037) /* convert select code to bit position */
#define BIT_M(S) (1u << BIT_V (S)) /* convert select code to bit mask */
#define setSKF(B) stat_data = IORETURN (SCPE_OK, (uint16) ((B) ? ioSKF : ioNONE))
#define setPRL(S,B) dev_prl[(S)/32] = dev_prl[(S)/32] & ~BIT_M (S) | (((B) & 1) << BIT_V (S))
#define setIRQ(S,B) dev_irq[(S)/32] = dev_irq[(S)/32] & ~BIT_M (S) | (((B) & 1) << BIT_V (S))
#define setSRQ(S,B) dev_srq[(S)/32] = dev_srq[(S)/32] & ~BIT_M (S) | (((B) & 1) << BIT_V (S))
#define PRL(S) ((dev_prl[(S)/32] >> BIT_V (S)) & 1)
#define IRQ(S) ((dev_irq[(S)/32] >> BIT_V (S)) & 1)
#define SRQ(S) ((dev_srq[(S)/32] >> BIT_V (S)) & 1)
#define setstdSKF(N) setSKF ((signal == ioSFC) && !N.flag || \
(signal == ioSFS) && N.flag)
#define setstdPRL(N) setPRL (dibptr->select_code, !(N.control & N.flag));
#define setstdIRQ(N) setIRQ (dibptr->select_code, N.control & N.flag & N.flagbuf);
#define setstdSRQ(N) setSRQ (dibptr->select_code, N.flag);
/* CPU state */
extern uint32 dev_prl [2], dev_irq [2], dev_srq [2]; /* I/O signal vectors */
/* CPU functions */
extern t_stat ibl_copy (const BOOT_ROM rom, int32 dev, uint32 sr_clear, uint32 sr_set);
extern void hp_enbdis_pair (DEVICE *ccp, DEVICE *dcp);
/* System functions */
extern const char *fmt_char (uint8 ch);
extern t_stat hp_setsc (UNIT *uptr, int32 val, CONST char *cptr, void *desc);
extern t_stat hp_setdev (UNIT *uptr, int32 val, CONST char *cptr, void *desc);
extern t_stat hp_showsc (FILE *st, UNIT *uptr, int32 val, CONST void *desc);
extern t_stat hp_showdev (FILE *st, UNIT *uptr, int32 val, CONST void *desc);
extern t_bool hp_fprint_stopped (FILE *st, t_stat reason);
/* Device-specific functions */
extern int32 sync_poll (POLLMODE poll_mode);
#endif
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