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I1620, I1401: Add max value to address registers

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This commit is contained in:
Bob Supnik
2022-06-16 16:13:46 -07:00
committed by Mark Pizzolato
parent 39c4610971
commit c55139c0a8
5 changed files with 19 additions and 12 deletions
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11
I1620/i1620_cpu.c
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@@ -1,6 +1,6 @@
/* i1620_cpu.c: IBM 1620 CPU simulator
Copyright (c) 2002-2018, Robert M. Supnik
Copyright (c) 2002-2021, Robert M. Supnik
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
@@ -26,6 +26,7 @@
This CPU module incorporates code and comments from the 1620 simulator by
Geoff Kuenning, with his permission.
01-Feb-21 RMS Added max value to address registers
05-Jun-18 RMS Fixed bug in select index A (COVERITY)
23-Jun-17 RMS BS should not enable indexing unless configured
15-Jun-17 RMS Added more information to IO in progress message
@@ -234,10 +235,10 @@ extern t_stat fp_fsr (uint32 d, uint32 s);
UNIT cpu_unit = { UDATA (NULL, UNIT_FIX+UNIT_BCD+MI_STD, MAXMEMSIZE) };
REG cpu_reg[] = {
{ DRDATA (PC, saved_PC, 16), PV_LEFT },
{ DRDATA (APC, actual_PC, 16), PV_LEFT + REG_HRO },
{ DRDATAD (IR2, IR2, 16, "instruction storage address register (PC)"), PV_LEFT },
{ DRDATAD (PR1, PR1, 16, "processor register 1"), PV_LEFT },
{ DRDATA (PC, saved_PC, 16), PV_LEFT, MAXADDR },
{ DRDATA (APC, actual_PC, 16), PV_LEFT + REG_HRO, MAXADDR },
{ DRDATAD (IR2, IR2, 16, "instruction storage address register (PC)"), PV_LEFT, MAXADDR },
{ DRDATAD (PR1, PR1, 16, "processor register 1"), PV_LEFT, MAXADDR },
{ DRDATAD (PAR, PAR, 16, "P address register (OR2)"), PV_LEFT + REG_RO },
{ DRDATAD (QAR, QAR, 16, "Q address register (OR1)"), PV_LEFT + REG_RO },
{ FLDATAD (SW1, ind[IN_SW1], 0, "sense switch 1" ) },

4
I1620/i1620_defs.h
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@@ -1,6 +1,6 @@
/* i1620_defs.h: IBM 1620 simulator definitions
Copyright (c) 2002-2017, Robert M. Supnik
Copyright (c) 2002-2021, Robert M. Supnik
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
@@ -27,6 +27,7 @@
I am grateful to Al Kossow, the Computer History Museum, and the IBM Corporate
Archives for their help in gathering documentation about the IBM 1620.
01-Feb-21 RMS Added MAXADDR for register contents
23-May-17 RMS MARCHK is indicator 8, not 18 (Dave Wise)
19-May-17 RMS Added option for Model I diagnostic mode (Dave Wise)
05-Feb-15 TFM Added definitions for flagged RM, GM, NB
@@ -88,6 +89,7 @@
/* Memory */
#define MAXMEMSIZE 60000 /* max mem size */
#define MAXADDR (MAXMEMSIZE - 1) /* max address */
#define MEMSIZE (cpu_unit.capac) /* act memory size */
/* Processor parameters */