[Simh] SIMH large file support

[Don North]

On 1/2/2016 2:46 PM, Mark Pizzolato wrote:
> On Saturday, January 2, 2016 at 2:41 PM, Christian Gauger-Cosgrove wrote:
>
> Here's the "show version" output for completeness' sake:
> sim> show version
> PDP-11 simulator V4.0-0 Beta
>          Simulator Framework Capabilities:
>                  32b data
>                  32b addresses
>                  Ethernet Packet transports:PCAP:NAT:UDP
>                  Idle/Throttling support is available
>                  Virtual Hard Disk (VHD) support
>                  RAW disk and CD/DVD ROM support
>                  Asynchronous I/O support
>                  FrontPanel API Version 1
>          Host Platform:
>                  Compiler: Microsoft Visual C++ 15.00.30729.01
>                  Simulator Compiled: Dec 19 2015 at 12:51:02
>                  Memory Access: Little Endian
>                  Memory Pointer Size: 32 bits
>                  Large File (>2GB) support
>                  PCRE RegEx support for EXPECT commands
>                  OS clock resolution: 1ms
>                  Time taken by msleep(1): 1ms
>                  OS: Windows:
> Microsoft Windows [Version 6.1.7601]
>                  Intel64 Family 6 Model 58 Stepping 9, GenuineIntel - x86-AMD64
>
>          git commit id: ca4a6901

I noticed in compiling SIMH on my Windows 7 64b system running 32b cygwin that 
large file support
is not detected by SIMH configuration (altho CYGWIN does support the 
fseeko/ftello routines with a 64b
offset value, as is required) in this environment.

I modified sim_fio.h andsim_fio.c to enable large file support detection for 
CYGWIN as follows and recompiled
without issue. Running my 2.11BSD image .dsk files on the resultant PDP11 
simulator works as expected.

simh-master[636] diff -b sim_fio.h*
44c44
<      defined (_WIN32) || defined (__CYGWIN__) || defined (__APPLE__) || \
---
 >      defined (_WIN32) || defined (__APPLE__) || \
simh-master[637] diff -b sim_fio.c*
337c337
< #if defined (__APPLE__) || defined (__FreeBSD__) || defined(__NetBSD__) || 
defined (__OpenBSD__) || defined (__CYGWIN__)
---
 > #if defined (__APPLE__) || defined (__FreeBSD__) || defined(__NetBSD__) || 
defined (__OpenBSD__)

Now says:

simh-master[638] pdp11

PDP-11 simulator V4.0-0 Beta        git commit id: 59947e8c
sim> show version
PDP-11 simulator V4.0-0 Beta
         Simulator Framework Capabilities:
                 32b data
                 32b addresses
                 Ethernet Packet transports:PCAP:NAT:UDP
                 Idle/Throttling support is available
                 Virtual Hard Disk (VHD) support
                 Asynchronous I/O support
                 FrontPanel API Version 1
         Host Platform:
                 Compiler: GCC 4.9.3
                 Simulator Compiled: Jan  2 2016 at 20:03:43
                 Memory Access: Little Endian
                 Memory Pointer Size: 32 bits
Large File (>2GB) support    <<========= used to say 'No large file support'
                 RegEx support for EXPECT commands
                 OS clock resolution: 1ms
                 Time taken by msleep(1): 1ms
                 OS: CYGWIN_NT-6.1-WOW lenovoS30w7 2.3.1(0.291/5/3) 2015-11-14 
12:42 i686 Cygwin

         git commit id: 59947e8c

Don

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