Talk:MOS Technology 6502

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Computing Mid‑importance

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This article is based on material taken from 6502 at the Free On-line Dictionary of Computing prior to 1 November 2008 and incorporated under the "relicensing" terms of the GFDL, version 1.3 or later.

Instruction table layout

Should the instruction table have the rows 000xxx00 to 111xxx11 (approximately corresponding to instructions) and the columns xxx000xx to xxx111xx (approximately corresponding to addressing modes)? — Preceding unsigned comment added by Qalle2 (talk • contribs) 22:45, 12 February 2022 (UTC)[reply]

Perhaps something like this (updated link). -Qalle2 (talk) 02:03, 13 February 2022 (UTC)[reply]

That's an interesting table but it might only be valuable for hard-core 6502 people. The current table seems fine. Johnuniq (talk) 02:50, 13 February 2022 (UTC)[reply]

The Tamagotchi probably did not use a 6502

The Wikipedia page states that the Tamagotchi used a 6502 and links to someones blogpost claiming it uses a 6502 with no evidence. Many pages, such as http://tama.loociano.com/, claims the original Tamagotchi uses a CMOS E0C6S46, which is more likely given its specs with, among other things, a controller for a LCD. Bjanders (talk) 17:47, 15 December 2022 (UTC)[reply]

The original Tamagotchi (P1) used E0C6S46, but a later version ("Tama-Go"?) used a 6502-derived GPLB5X processor. [1] [2] Krótki (talk) 09:22, 23 December 2022 (UTC)[reply]

74158

"Peddle suggested that anyone that actually required this style of access could implement it with a single 74158." I don't see how that would work with just one, the 74158 is a quad 2-input mux, the bus is 16 bit. The source doesn't say "single" either, just "a". Someone with better knowledge of the topic, please fix Aecho6Ee (talk) 08:04, 12 November 2023 (UTC)[reply]

Yes it looks like you need four of them. More usual would be tristate buffers like the 74367, but the MUX are fine, too. Many of the early chips, and I didn't look up this one, could barely drive one TTL gate. Gah4 (talk) 21:05, 12 November 2023 (UTC)[reply]

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