Simple VGA Mode X (direct frame buffer) programming - Raspberry Pi Forums

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back in day used vga (mode x) programming on ibm; same type of retro-style graphics (perhaps upgrade bit super vga) in order display graphics emulator i'm writing not sure start. i'm aware pi folks released gpu libraries open source userland (https://github.com/raspberrypi/userland) don't need opengl or of fancy shmancy interfaces (or i?) i'm wondering if can point me right guide; want ol' fashioned writing video memory if can have it.

many in advance,

anthony

yeah, easier that, handshake or 2 gpu gain access framebuffer, poke bytes in draw pixels, simple mode x was. in these forums number of discussions on getting framebuffer address, not complicated folks make out (didnt need many discussions) setup structure kick right mailbox , answer , start drawing pixels.

did once years ago, uart, , dont bother video/graphics not first person ask on details, having had done it, pretty easy then, not sure if pi2 or pi3 adds complication there number of folks here bare metal code can point @ examples or work details...


raspberrypi



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