In the screenshot in my attachment, there is a detailed description of the [0015CA] error code, but it does not provide a specific solution

best guesses

1) Too much memory and the tiny buffer counting it is overflowing. Reduce VM to... say 4mb.
2) Not enough conventional memory. Run MEM and/or memmaker.

I have modified some memory related configurations in the dosbox configuration file, but the same issue persists. The log output of the mem command is as follows:

1Memory Type        Total  =   Used  +   Free
2----------------  -------   -------   -------
3Conventional         640K        6K      634K
4Upper                 64K        3K       61K
5Reserved             384K      384K        0K
6Extended (XMS)    15,296K      128K   15,168K
7----------------  -------   -------   -------
8Total memory      16,384K      521K   15,863K
9
10Total under 1 MB     704K        9K      695K
11
12Total Expanded (EMS)                16,384 (16,777,216 bytes
13Free Expanded (EMS)                 15,168 (15,532,032 bytes
14
15Largest executable program size       634K (648,736 bytes)  
16Largest free upper memory block        61K  (62,336 bytes)  
17MS-DOS is resident in the high memory area.

Ok, now try the first suggestion

myne wrote on 2025-05-23, 07:36:

Ok, now try the first suggestion

I have almost tried most common specifications of memory and DOS versions, and on real physical devices. The memory specifications range from 512KB, 1MB, 2MB, 4MB, 8MB, and 16MB. DOS versions have been tested from 3.3 to 7.1, and without exception, all have the same error message.

And 16MB RAM

I speculate that early versions of CUPL may not support extended memory (such as EMS, XMS, etc.), which would result in it only being able to use 640KB of standard memory. However, parsing and simplifying logical expressions themselves is a very memory and computationally intensive operation. If it's just the keyboard in the example that can't be used, it's okay. I'm currently working on a project where I need to integrate a logical expression of thousands of lines into an SPLD chip. If it's a CPLD, it can be fully integrated using more advanced software such as Verilog based Maxplus II, Quartus II, or ISE. But I need to use SPLDs with fewer pins to do it, which is really a spacing task.

I have also tried using other versions of CUPL software, such as CUPL3.2B and CUPL4.0A, but when parsing large CUPL language source files, they reported an error of insufficient memory. Although CUPL3.2B can integrate the keyboard program in the example normally, it still cannot integrate my program. At the same time, I also tried using CUPL on early Windows platforms, such as wincupl4.8a. During testing, I found that this version had removed many traditional device libraries, which means it no longer supports some old devices. Even if WinCupl can integrate normally, it is impossible for me to generate the final JED file written to the target chip because the new version of WinCupl no longer supports old devices.

rainhenry wrote on 2025-05-26, 06:47:

myne wrote on 2025-05-23, 07:36:

Ok, now try the first suggestion

I have almost tried most common specifications of memory and DOS versions, and on real physical devices. The memory specifications range from 512KB, 1MB, 2MB, 4MB, 8MB, and 16MB. DOS versions have been tested from 3.3 to 7.1, and without exception, all have the same error message.

Hmm
It's all xms. No ems.
Maybe that program requires ems

Thenumberofproducttermsgeneratedisovertwelvethousand(4096x3+1). Thisnumberofproduct termswouldprobablyproducean“outofmemory”errormessagebecauseCUPLcannotholdthismany producttermsinmemoryatonetime.

https://ece-classes.usc.edu/ee459/library/doc … L_Reference.pdf

Selecting Compiling options
This item allows you to select items specifically for compilations
Under the Options menu, choose the "Compiler Options" item.

The Logic Minimization drop down box allows you to select what minimization level you want.
This selection can be overridden on specific outputs by using the MIN statement.
Quine McCluskey is the best optimization method, but it is slow and more prone to run out of memory than the other methods. Use this only if necessary.

https://pages.uoregon.edu/torrence/432/docs/CUPL.html

0015ca out of memory: “condition” Fatal. CUPLA has used all available RAM memory which has been allocated by the operating system. Decrease the number of intermediate variables, fields, or numbers in order to reduce the size of the symbol table.

https://www.google.com/url?sa=t&source=web&rc … 5hX3ffhghY8TuB_