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23 September 2026
| 04:23 | Atari Portfolio diffhist +3,305 Josh talk contribs (Rewritten against Atari's Portfolio Technical Reference Guide: 128 KB is four 32 KB SRAMs and 256 KB ROM is two 128 KB devices, 4 KB of RAM mapped at B000h as video RAM, 63-key switch-matrix keyboard, 60-pin expansion port, 6x8 character cell, software-controlled contrast; power documented properly (three AA cells stepped UP to 5 V, 5VS 40 mA at 5 V +/-5%, VRAM 4.5 V, VEXT, BATD, four power modes); lithium cells are inside the memory cards; corrected weight to 433 g and dimensions to 26 x 197...) | ||||
22 September 2026
| 23:33 | Upload log Josh talk contribs uploaded File:Atari Portfolio Technical Reference Guide.pdf (Atari documentation for the RTC verification drive) | ||||