9th sector 0th track.

ABOUT! Hello All! To run is-dos from a screw on a scorpion the bootloader is placed in the subject of the disk (tr-board), which launches is-dos, please explain how this is done? (See also BOOT2000) Happy! All! [KINO] [ZX] [Guitar] [ZENIT!!!]

Greetings, Alexandr! AK> To launch is-dos from a screw on a scorpion AK> its boot loader is placed in the subject of the disk (tr-board), AK> which launches is-dos, please explain how this is done? AK> (See also BOOT2000) More precisely, sector 15, track 0. I don’t remember where I stole it from: === Begin file: zs/avto.asm === Description of self-starting TR-DOS disk on SCORPION 256 (on other SPECCY models it doesn’t go away, but it doesn’t interfere with work either) On scorpions with professional ROM shadow with established alternative mode configuration (from disk) loads 15 sector, checks for the presence of an identifier (#41 #4D at the beginning of the sector) and launches the program recorded after it, which configures shadow and other settings, but no checks for correctness itself the program is not produced, thus you can write your own program that will run after every reset computer, it doesn’t matter, cold or warm or software (ROM 0 JP 0). Yes, I almost forgot - Scorpov’s pzu, and not a professional, he also starts it for some reason this program, why does it do this - a mystery shrouded in darkness. The most interesting, in my opinion, use this opportunity to create self-starting TR-DOS disks (real ones, but not on the hard drive!*!), which will themselves start after reset in TR-DOS mode 128.By the way, no one bothers you use this feature of Scorpov's pzukh for other purposes. BASIC _HE_ is initialized at the moment configuration, so it's best go to TR-DOS ROM to address 0, this is address that was used on the 48k computer yuters with TR-DOS to reset, that is, here BASIC and TR-DOS are installed, and then The file boot.B is launched from disk A. The address where the program is downloaded configuration is not permanent, but depends on the ROM version number, but always register pair HL indicates start programs. Here is the disassembler with comments: #8000 DI ;Just in case... #8001 LD DE,#0F ;Offset of the main program relative to ;started. #8004 ADD HL,DE ;Add offset to HL. #8005 LD DE,#4000 ;Transfer to #4000. #8008 LD BC,#0013 ;The length of the main program #13 bytes. #800B PUSH DE ;Save DE on the stack, then according to this ad- ;let's move on, saving memory, this is ;slower than JP #4000 by 1 byte. #800B LDIR ;We transfer the main program to #4000, ;it should not be above #C000, so ;how it switches memory banks. #800E RET ;Jump through the contents of the top of the stack, into ;in this case at address #4000. #800F LD BC,#1FFD #8012 XOR A #8013 OUT (C),A #8015 LD B,#7F #8017 LD A,#10 #8019 OUT (C),A ;Setting RAM 0,ROM 1,SCR 5. ;Port #7FFD is not blocked. #801B LD HL,#0000 #801E PUSH HL #801F JP #3D2F;Switching ROM to TR-DOS and going through ;address 0 (in TR-DOS ROM). In my opinion, some users it will be easiest to enter the following Memory dump by disk doctor into sector 15. You _cannot_ write to such a disk computer configuration - autostart will be overwritten by the config. Here is a program dump, it is driven directly to the beginning of sector 15, the remaining bytes are sec. torus are unimportant. 41 4D F3 11 0F 00 19 11 00 40 01 13 00 D5 ED B0 C9 01 FD 1F AF ED 79 06 7F 3E 10 ED 79 21 00 00 E5 C3 2F 3D === End file: zs/avto.asm === In fact, rarity is everything - sometimes only required if there is no smack, more precisely nvram. Happily. Michael.

Hello Mikhail! 06 Jul 00 05:44, Mihail Zharov -> Alexandr Kolotukhin: [skipped] MZ> On scorps with prof-ROM shadowbox MZ> installed alternative mode MZ> configuration (from disk) loads 15 MZ> sector, checks for the presence of an identifier MZ> (#41 #4D at the beginning of the sector) and starts MZ> the program recorded after it, which MZ> configures shadow and other settings MZ> but no checks for correctness itself MZ> programs are not produced, thus [skipped] It is more correct to write the identifier as "AM" are the author's initials. :) MZ> Yes, I almost forgot - Scorpov’s pzy, MZ> and not a professional, it also starts for some reason MZ> this program, why it does this - MZ> a mystery shrouded in darkness. This is where we’ll start kicking mercilessly :) Just why leave this stuff in the vocational school is unclear! Because in the professional department there is CMOS for storing setup data, there are “service sectors” of the screw, etc. But for an ordinary scorpion this is just the right feature! MZ> The most interesting, in my opinion, MZ> use this opportunity to create MZ> self-starting TR-DOS disks (real, a MZ> not on the hard drive!*!), which will be there themselves MZ> start after reset in TR-DOS mode MZ> 128. And who said that this cannot be done on a regular scorpion????? The most living example is my network node on Scorpio ;) To get it started, just turn it on car. All! There is no need to press any buttons. The "boot" program will load itself and that's it... [skipped] MZ> BASIC _HE_ is initialized at the moment MZ> configuration, so it’s best MZ> go to the TR-DOS memory at address 0, this MZ> address that was used on the 48k computer MZ> yuters with TR-DOS to reset, that is, here MZ> BASIC and TR-DOS are installed, and then MZ> the boot.B file will be launched from disk A. [skipped] MZ> Here is the disassembly with comments: [skipped] How busy everything is..... Here is the same plug from FK0. She is the one who works for me :) ╒════════ Start boot.txt ════════╕ DB "AM" DS #10 D.I. LD SP,#8000 LD BC,#7FFD LD DE,#0010LD HL,#3D2F PUSH HL LD HL,#C351 PUSH HL LD HL,#ED1F PUSH HL LD HL,#0659 PUSH HL LD HL,#ED00 LD H,L PUSH HL INC HL ADD HL,SP JP(HL) ╘════════ End boot.txt ════════╛ [skipped] MZ> In fact, popularity is everything - sometimes MZ> is required only if there is no taste, more precisely MZ> nvram. This is required if there is nothing ;) Alexand