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The software runs on MS-DOS, I assume it is hardcoded to use LPT1.
by krylon 8y ago
The software runs on MS-DOS, I assume it is hardcoded to use LPT1.
- cesarb 8y agoIf it runs on MS-DOS, it most probably isn't hardcoded to use "LPT1" (the DOS device), but instead is hardcoded to use the exact I/O port and IRQ normally assigned to LPT1 (according to Wikipedia, I/O port 0x378 and IRQ 7). Other than filesystem and disk access, software running on MS-DOS nearly always accessed the hardware directly.
- krylon 8y agoI just found out that the piece in software is being rewritten from scratch (since the original vendor has gone out of business long ago). And since the new version is written by a contractor on behalf of the customer, it will not require a dongle or anything like that.