History of Canon’s fluorite lenses
BBC #BASIC #graphics #raytracer in half a kilobyte, though I think the line numbers are maybe missing #small-is-beautiful
BBC #BASIC #graphics #raytracer in 8 lines of code, 448 bytes, with #emulation. 10 REMĀĘĆĞ$Č*Ēĉ!ăě-ĕ'ď 20 MODE1:VDU5 30 FORN=8TO247:FORM=0TO319 40 X=0:Y=-.1:Z=3:U=(M-159.5)/160:V=(N-127.5)/160:W=1/SQR(U*U+V*V+1):U=U*W:V=V*W:I=SGNU:G=1 50 E=X-I:F=Y-I:P=U*E+V*F-W*Z:D=P*P-E*E-F*F-Z*Z+1:IFD>0T=-P-SQRD:IFT>0X=X+T*U:Y=Y+T*V:Z=Z-T*W:E=X-I:F=Y-I:G=Z:P=2*(U*E+V*F-W*G):U=U-P*E:V=V-P*F:W=W+P*G:I=-I:GOTO50 60 IFV<0P=(Y+2)/V:V=-V*((INT(X-U*P)+INT(Z-W*P)AND1)/2+.3)+.2 70 GCOL0,3-(48*SQRV+?(PAGE+5+M MOD4+N MOD4*4)/3)DIV16 80 PLOT69,4*M,4*N:NEXT,
Nelson Beebe’s PLOT79 #PDP-10 software had 29 installations worldwide in 01981, according to his example pie chart here. The following page explains, “Plot facilities on the College of Science DECSYSTEM-20 currently consist of the following: ... Apple LaserWriter laser printer ... Imlac PDS-1D refresh-type CRT” #history #vector #graphics
comparison of #STM8 8-bit compilers
a version of BBC #BASIC for SDL 2, supporting an in-browser interface
Bre Pettis’s Bantam Tools has bought Evil Mad Scientist Labs
#ESP32 #security against physical access broken with power side-channel attacks, including the ESP32-C3 and ESP32-C6
writeup of successful #ESP32 power side-channel attack. #security
#hardware designs for successful #ESP32 power side-channel attack. #security
Source code for successful #ESP32 power side-channel attack. #security
Keir Fraser of Xen and STM fame has a guide to #STM32 fakes and the #CKS clone CS32F103, because he’s been working on Greaseweazle #hardware apparently for floppy #archival
on #STM32 clones, including the #CKS clone, the #GD32, and the #WCH clone. Discussion in the comments says the CKS chip is fine, while the GD32 reliably has 128KiB of Flash, but its USB peripheral isn’t quite compatible
notes on #STM32 clone from "CKS" (中科芯微)