| System ROM | 6502 CPU | System RAM and Video RAM might be merged. | ||
| System RAM | ||||
| Video RAM | Mpx | |||
| ULA VDG | ||||
| Tape | A | |||
| Kbd | ||||
| Lpt | 6522 VIA | |||
| Sound |
Circuit Diagrams
Available on the net as scan of hand-drawn circuit.
Pete's Oric site contains circuit diagrams.
Keyboard
Sound
The AY38912 provided sound.
16K ROM contains OS and BASIC.
16K minimum, but most have 64K fitted with the ROM replacing the top 16K so 48K accessible.
Video RAM and Address Multiplexer
.
Implementation
.
Passionoric
has an a French Oric-in-FPGA project. This is a work in
progress but currently includes VHDL source code for a 6522 and
an AY38912 programmable sound generator.
(has annoying pop-up adverts)
Oric
World by Fabrice Frances.
Contains a good technical study of the Oric
ULA dated 1996 so I guess the
author never got round to implementing it in TTL.
Rhetoric magazine.