4 ms·

Microsoft returns to the Altair

41 points by ohjeez 4y ago

garganzol 4y ago
Another cool project in that area: a modern replica of IMSAI 8080 [1]. (IMSAI 8080 was a hugely successful competitor to Altair) [1] is not only a replica, it is much more. For example, the project demonstrates an interesting concept of a networked desktop that can be accessed using any web browser. [1] https://thehighnibble.com/imsai8080/ https://thehighnibble.com/imsai8080/
nix23 4y ago
Read the first comment before watching it....
- bogantech 4y ago
  Are you referring to "“I don’t have the source code for CP/M, I’m not even sure it exists anymore." ? It is available but I'm not sure why him not knowing about it is supposed to be some gotcha or something anyone should care about?
  - nix23 4y ago
    >This video is apparently only made as entertainment, just some guys blabbing and not caring about facts, That may be all right for some, it makes me wonder what else is off and I lost interest. It's all in the first comment.....
ratboy666 4y ago
Does this run kill-the-bit? (IOW, does anyone know if this is a cycle-accurate emulation?). Happy enough with my Altair-Duino, which is (pretty much) cycle accurate -- maybe a bit faster than the real thing... (2.5Mhz, perhaps). ORG 100H ; MCYC: LXI H,0014H ; 10 TOP: LXI B,8200H ; 10 TOP2: DCR C ; 5 JNZ TOP2 ; 10 DCR B ; 5 JNZ TOP2 ; 10 DCR L ; 5 JNZ TOP ; 10 RET ; END This is a program that should execute in 5 seconds on a 2MHz 8080 -- pretty much 10,000,000 cycles (cycle times on the right). As to CP/M... Microsoft did produce software for CP/M (8080 and/or Z80) -- Macro Assembler, Fortran, COBOL, BASIC and BASIC compiler and some applications. Spreadsheet, SORT, EDIT (a VERY limited implementation of TOPS-10 SOS -- no line moving, for example). If anyone has seen, or has a copy of the CP/M Microsoft SORT utility... please preserve that artifact.

41 points by ohjeez 4y ago

Another cool project in that area: a modern replica of IMSAI 8080 [1]. (IMSAI 8080 was a hugely successful competitor to Altair) [1] is not only a replica, it is much more. For example, the project demonstrates an interesting concept of a networked desktop that can be accessed using any web browser. [1] https://thehighnibble.com/imsai8080/ https://thehighnibble.com/imsai8080/

nix23 4y ago

Read the first comment before watching it....

bogantech 4y ago
Are you referring to "“I don’t have the source code for CP/M, I’m not even sure it exists anymore." ? It is available but I'm not sure why him not knowing about it is supposed to be some gotcha or something anyone should care about?
- nix23 4y ago
  >This video is apparently only made as entertainment, just some guys blabbing and not caring about facts, That may be all right for some, it makes me wonder what else is off and I lost interest. It's all in the first comment.....

ratboy666 4y ago

Does this run kill-the-bit? (IOW, does anyone know if this is a cycle-accurate emulation?). Happy enough with my Altair-Duino, which is (pretty much) cycle accurate -- maybe a bit faster than the real thing... (2.5Mhz, perhaps). ORG 100H ; MCYC: LXI H,0014H ; 10 TOP: LXI B,8200H ; 10 TOP2: DCR C ; 5 JNZ TOP2 ; 10 DCR B ; 5 JNZ TOP2 ; 10 DCR L ; 5 JNZ TOP ; 10 RET ; END This is a program that should execute in 5 seconds on a 2MHz 8080 -- pretty much 10,000,000 cycles (cycle times on the right). As to CP/M... Microsoft did produce software for CP/M (8080 and/or Z80) -- Macro Assembler, Fortran, COBOL, BASIC and BASIC compiler and some applications. Spreadsheet, SORT, EDIT (a VERY limited implementation of TOPS-10 SOS -- no line moving, for example). If anyone has seen, or has a copy of the CP/M Microsoft SORT utility... please preserve that artifact.