Search Results

I remember having seen a video on Youtube where two vintage computers (because one would have been to slow) were used to detect position and speed of a marble in this game where you can tilt a wooden …

Looking at the specs from your link, CPU: AMD 8085 RAM: 32K ROM: 32K GPU: Plessey MR9735-02 (Viewdata processor) with 1K page memory RAM Modem: Philips SAA5070 "LUCY" Monitor: 5" integrated Keyboard …

Well, the wikipedia article links to the service manual (see Reference 23), and though it is in French, it contains the pinout for the connectors and complete schematics. (Took me a few minutes to fin …

And people did use vinyl grammophone records to store computer programs (though more as a gimmick), see for example here about a Commodore 64 program hidden within Prodigal’s 1984 album entitled Elect …

As you can see from the schematic, the Armstrad uses a 6845 compatible display controller together with a custom-made Gate Array or ASIC for video output. The Gate Array also controls the screen modes …

Additional information to complement the answer by Fuzzy_Bunnys: 1) An Forth chip I like very much is the J1. It even comes with the Verilog source. It runs e.g. on an Xilinx Spartan 3E FPGA at 80 M …

A bit of googling finds that SMC is "Standard Microsystems Corporation", apparently got renamed at one time to SMSC and finally to "Microchip". The FDC37C654 is a Super-I/O chip with a floppy disk con …

The Asante Ethernet Card Installation guide states that the FPU could be only used on LC and LCII computers, and not on computers which already had a math co-processor or FPU (p. 2-9). There is only …

My Apple II runs fine with an old PC PSU (though this one still had -5V). So you do not need an original one.

A and B are two shiftable 8-bit registers. They form a serial ALU. U is the Überlauf-Register (carry). "Takt" is the clock signal. It shifts both registers, after 8 clocks the operation is complete. A …

3D accelerators in the sense you are describing for a pipeline rendering triangles etc. only came up after discrete logic was already phased out for much higher integration. So you'd have accelerators …

Answer to update on top: While my angle is to create my own computer using TTL chips I am looking at 6502 block diagrams, at PDP-8 ISA and schematics, as the 4004 and TMS-1000. Then you are lookin …

Remember that these systems (not only the Osborne 1) didn't have harddisks. Everything ran from floppies. So usually you had one floppy where the program was on, together with OS related files. And a …

Partial answer: While I wasn't able to find schematics for how the Flexwrite is wired up to the KDF9 (say), there are some Flexwriter manuals availavle on bitsavers. The Flexwriter apparent came wit …

The Commodore 64 used a single CIA for both the keyboard and joystick (or paddles). This made reading both the keyboard and the joystick at the same time a bit of challenge, see this answer for detai …