[cctalk] Re: Philips P2000C disk format

Out of curiosity I downloaded the P2000C system disk images from Dave Dunfield's archive and looked through them in Linux using the strings command. Turns out, in the 4th disk image (P2000_4.IMD) there appears to be the assembler source for a format command that can handle multiple diskette formats. There are table entries for the P2000C's 160KB format as well. I haven't had time to look through it all and figure out all the values but perhaps that can be a good starting point? As an example, a couple of snippets of what I found: ;============================================== ;THIS FILE HAS THE DISK TABLES FOR UTILITY ;THE TABLE HAS FOLLOWING STRUCTURE: ;BYTES 00-01 LENGTH OF TH B 0E5H ;FORMAT INFO DEFB 10H ; OF SECTORS ON SIDE-0 DEFB 1,02H,03H,04H,05H,06H,07H,08H ;SECTORS IN TRACK FORMAT DEFB 9,0AH,0BH,0CH,0DH,0EH,0FH,10H DEFB 10H ; OF SECTORS ON SIDE-1 DEFB 1,02H,03H,04H,05H,06H,07H,08H ;SECTORS IN TRACK FORMAT DEF ;DESCRIPTOR FOR 2000C 160K DISK DT2: DEFB DT3-DT2 ;TABLE LENGTH DEFT 'P2000C 160K - CP/M' ;NAME FORMATTING INFO (E5, OR F6) ; 1 BYTE FOR THE OF SECTORS ON SIDE-0 ; BYTES FOR THE SECTOR NUMBERS ON SIDE-0 ; 1 BYTE FOR THE OF SECTORS ON SIDE-1 ; BYTES FOR THE SECTOR NUMBERS ON SIDE-1 ; SYSTEM IDENTIFIER 1=CP/M ; 3=MSDOS ; IF MSDOS: 1 DEFB 81H ;FLAG FOR SINGLE SIDED DEFB 28H ;NUMBER OF TRACKS DEFB 1 ;TR MULTIPLIER ACTIVE SRL H RET ;TRANSL SUBR FOR BIOS DEFB 0 ;TO MAKE UP 4 BYTES DEFB 1 ;1 SUBTABLE DT21: DEFB DT22-DT21 ;LENGTH OF SUBTABLE DEFT 'CP/M' ;SUBTABLE NAME DEFB 1 ;SECT LGTH = 256 BYTES DEFB 0E5H ;FORMAT INFO DEFB 10H ; OF SECTORS ON SIDE-0 DEFB 1,02H,03H,04H,05H,06H,07H,08H ;SECTORS IN TRACK FORMAT DEFB 9,0AH,0BH,0CH,0DH,0EH,0FH,10H DEFB 0 ; OF SECTORS ON SIDE-1 DEFB 1 ;FOR CP/M DEFB 20H,0, 7,08,11,12,15,16 DEFB 19,20,23,24,27,28,31,32 On Mon, Dec 9, 2024 at 8:44 AM Tony Duell <ard.p850ug1(a)gmail.com> wrote: