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I added a better image of where the cables go into the connector on the Plus which links the logic and analog board (J4 on the analog side); wires are inserted from above the logic board connector

I don't plan to swap-in/swap-out ROMs often and I don't plan to own a programmer. If I need a ridiculous amount of fast loaded software with no size limits, I'm just happy with a BlueSCSI v2 rather than the hoop jumping of gettting a programmer. That's just me though. I don't have a case...

I checked my SE/30 ROM SIMM bought earlier this year from BMOW and indeed it is a 1.20 mm variant. I'll be doing the drag soldering technique, I don't expect to move it much. My soldering equipment is there on my bench if I need to apply a new coat, which I don't expect to do. I don't have...

NEW AND IMPROVED 9 HDMI cables, 3 INPUTS (was 2) and still 3 OUTPUTS

The other day, I was browsing Mac Garden and stumbled, as one does, upon an interesting 30th Anniversary font https://macintoshgarden.org/apps/macintosh-icon-font , which promised to help me do this infographic I was thinking about doing for years, but put it off because pixel art is tough to...

Here are the pins used on the Mac SE/30 J12 connector, seen from ABOVE the board. Pay close attention, the four corners are marked with the silkscreen around the connector on the logic board. (sept 8 edit made a better J12 connector (seen from above the logic board) diagram)

Here are the settings in text form for the SE/30 Mac SE/30: Geometry: Setup Mode: normal H Offset: 176 V Offset: 28 Min H Width: 512 Min V Height: 342 Max H Width: 512 Max V Height: 342 H Pixel Aspect: 2 V Pixel Aspect: 2 FB Size: Normal FB Bits/Pixel: 8 Clock Frequency: 15667200 Line Length...

I'm trying to install a RGBtoHDMI to my Mac SE/30 and I get an unstable image. Anyone else deal with this exact machine? Taking the Classic profile I have that's stable on my Classic 1 and just flipping the polarity to H+V+ does not do the trick so far. edit - ok I'm an idiot. wire colors are...

@Webecedarian do you have one of these? USB Floppy Drive, available now on the market (amazon, computer stores, etc) Any modern computer with a USB port can now read and write these high density (1.4 mb) floppy disks. It's a great, simple way to send not-too-big stuff to a vintage computer...

Under @eric 's guidance yesterday, I was able to accomplish this on my Mac Plus - there's a bug for the Mac Plus that @eric and @jcs are aware of and will be working on. -Flashed my BlueSCSIv2 with Pico W with this beta .uf2 file by connecting with USB to my PC while holding on the button...

Mu0n's Mac Plus configurations:

In trying to help @Ron's Computer Videos make his Texelec board work, which was based on the 12-bit board with his Classic 1, here are all of my configuration screens: Mu0n's Mac Classic 1 configurations:

Made some minor revisions and added pictures for the wires that go into the RGBtoHDMI. Left to do: better picture of those same wires going into the Mac Plus J connector side.

Also, rereading that thread again in this post: https://68kmla.org/bb/index.php?threads/whats-your-recollection-of-mac-plus-offscreen-copybits-refresh-rate.38001/post-411778 particularly this passage from National Treasure @Crutch, Testing that idea out: I get flickering again, because I...

mini-vMac benchmarks at 1x speed VS real Mac Plus 16-bit - move.w using a flexible reference pointer allowing for other sizes (aka +0x40 to go to the next line with that reference) ASM block copy with words (16bit) of a 128x72 bitmap, average of 100 times: 3166 microseconds VS 3666 ASM block...

I'm an idiot. The move from C to asm remove the outer loop so I was always doing it only once. I've set yet another register for the repeat loop control. Also I read that I shouldn't use any old register freely to make sure I don't lose control as per: so I replaced: A0 -> A2 A1 -> A3 A3 ->...

EDIT- these results are no good, see below for correct ones. Early results (mini-vMac, Finder 4.1, under 1x speed): ASM block copy with words (16bit) of a 128x72 bitmap, average of 100 times: 166 microseconds per blit (copybits was 14166 microseconds!) ASM block copy with words (16bit) of a...

YES, thank you! A little bit more was needed though: asm block is now: asm { move.l nbOfLines,d1 //number of lines to do move.l source,a0 @startofline: move.l nbOfWords,d0 //number of words (or 2-bytes, 16bits) to draw move.l dest,a1 @stilldoingline...

is correct, I got blindsided by the (a0)+,(a1)+, thinking everything is symetrical, they are of course not! Thanks for the sanity check. I believe you're missing the fact I'm using 2 variables for addressing instead of just a single parsing one. The first variable is a register (A1) and lets me...

Sanity checks: Start of 72 lines loop Start of 8 words loop source = (long)bm.baseAddr = 0x398F6F0 dest = (long)backgroundWin->portBits.baseAddr + 16 (just to put it 16*8 pixels to the right, arbitrarily somewhere else) = 0x05EC0010 a0 = 0398F6F0 a1 = 05Ec0010 d0...