Questions tagged [reference-request]

Requests to identify, locate or recommend literature (or other source) covering a specific topic.

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23
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3answers
3k views

Documentation for the ZX Spectrum ULA

I am writing a Spectrum emulator, however I am finding it difficult to find official or reliable information about the ULA, its functioning and its pins. Are there official sources documenting its ...
12
votes
1answer
750 views

What publication published an early version of the Apple Monitor by Woz?

This is driving me nuts. I am certain I have a downloaded scan of the source code to the 6502 ML monitor Woz wrote, but pre-dating Apple's use of the monitor. I even remember there was some text ...
11
votes
5answers
663 views

Has there been any effort to research the undocumented Thumb instructions of ARM7TDMI?

Many CPUs have "holes" in the ISA, where the bit pattern is left undefined. Considering the Z80 and the 6502, many people have mapped out what these undocumented instructions actually do. ...
10
votes
5answers
748 views

Where are the authoritative specs for legacy PC/AT devices still in use in today's PCs?

For example, the 8250/16550 chip used to handle serial communication is still simulated by modern chipsets and is enumerated by ACPI as PNP0500/PNP0501. You can find datasheets for these chips. ...
9
votes
1answer
240 views

Documentation for the MIT PDP-1X OS

The PDP-1x is a Digital Equipment Corporation PDP-1 computer modified to support both ones and twos complement arithmetic, and to include a memory management unit. It ran a locally developed ...
9
votes
0answers
506 views

Does anyone have a DG Business BASIC manual?

archive.org's DG collection has Single User BASIC and Extended BASIC manuals, but no BB manual. Does anyone have a PDF? The underlying question... the earliest mention of BB I can find is from a 1977 ...
7
votes
1answer
247 views

Are there any other historical traces of the earlier versions of the Alternate Multiplex Interrupt Specification by Ralf Brown?

I'm a fervent user of the Alternate Multiplex Interrupt Specification for 86-DOS systems, a method using a common set of multiplexer interfaces over interrupt 2Dh. It was originally developed in the ...
6
votes
2answers
516 views

Where is the literature for Windows 3.1 Batch mode setup?

For the purpose of debugging why the first start of Windows 3.1 after the installation crashes DOSBox, I was looking for a way to automate the installation process. Surprisingly, there is one, the /H ...
4
votes
2answers
510 views

Is there any documentation for programming Microsoft Windows Sound System sound cards?

I'm programming my own sound mixing engine and drivers for MS-DOS, but I can't find any documentation for programming for Microsoft Windows Sound System interface sound cards. Was there any ...
3
votes
2answers
259 views

Looking for Popular Mechanics issue on BASIC

I remember being captivated as a teenager by an issue of Popular Mechanics that introduced the BASIC programming language. It would have been late 70's or early 80's. Anyone know how to find which ...
2
votes
0answers
78 views

DEC RdbStar information?

I'm putting together an article on TPC-C, and while chasing down leads its primary author mentioned the RdbStar project at DEC. As he described it, the manager of DEC's storage department (Jim Grey? ...