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Atari Portfolio: Revision history

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23 September 2026

  • curprev 04:2304:23, 23 September 2026 Josh talk contribs 13,580 bytes +3,305 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... undo

30 March 2026

29 March 2026

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