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pcat: we have PROMPT!

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Not working, but we do get that sweet "CollapseOS".
This commit is contained in:
Virgil Dupras 2020-06-20 16:58:48 -04:00
parent 397ee3e3e6
commit 60ecab314e
3 changed files with 7 additions and 5 deletions
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6
blk/811
View File

@ -4,7 +4,9 @@ ORG @ 0x25 + HERE ! ( bypass BPB )
L1 FSET ( start )
CLI, CLD, AX 0x800 MOVxI, DS AX MOVsx, ES AX MOVsx,
SS AX MOVsx, STI,
AH 2 MOVri, DX 0 MOVxI, CH 0 MOVri, CL 2 MOVri, AL 7 MOVri,
BX 0 MOVxI, 0x13 INT, ( read sectors 2-9 of boot floppy )
AH 2 MOVri, DX 0 MOVxI, CH 0 MOVri, CL 2 MOVri, AL 12 MOVri,
BX 0 MOVxI, 0x13 INT, ( read sectors 2-14 of boot floppy )
( TODO: reading 12 sectors like this probably doesn't work
on real vintage PC/AT with floppy. Make this more robust. )
0x800 0 JMPf,
ORG @ 0x1fe + HERE ! 0x55 A, 0xaa A,

2
blk/813
View File

@ -9,7 +9,7 @@ H@ XCURRENT ! ( set current tip of dict, 0x42 )
CODE (br) ( 0x53 ) L2 BSET ( used in br? )
DI DX MOVxx, DI [DI] MOVx[], DX DI ADDxx,
;CODE NOP, NOP,
CODE (br?) ( 0x67 )
CODE (?br) ( 0x67 )
AX POPx, AX AX ORxx, JZ, L2 @ RPCs, ( False, branch )
( True, skip next 2 bytes and don't branch )
L1 BSET ( loop will jump here ) DX INCx, DX INCx,

4
recipes/pcat/xcomp.fs
View File

@ -10,10 +10,10 @@ CODE (emit)
AX POPx, AH 0x0e MOVri, ( print char ) 0x10 INT,
;CODE
CODE (key) AH AH XORrr, 0x16 INT, AX PUSHx, ;CODE
: FOO (key) (emit) ;
: BOOT 0x08 @ LIT< FOO _find DROP EXECUTE BYE ;
380 LOAD ( xcomp core high )
(entry) _
( Update LATEST )
PC ORG @ 8 + !
EOT,
ORG @ 256 /MOD 2 PC! 2 PC!
H@ 256 /MOD 2 PC! 2 PC!