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0b8c8c9ca0
...
b8ea515612
8
blk/042
8
blk/042
@ -7,10 +7,10 @@ context, branching doesn't work.
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f IF A ELSE B THEN: if f is true, execute A, if false, execute
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B. ELSE is optional.
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[IF] .. [THEN]: Meta-IF. Works outside definitions. No [ELSE].
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BEGIN .. f UNTIL: if f is false, branch to BEGIN.
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BEGIN .. AGAIN: Always branch to BEGIN.
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x y DO .. LOOP: LOOP increments y. if y != x, branch to DO.
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(cont.)
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x CASE y OF A ENDOF z OF B ENDOF C ENDCASE: If x == y, execute
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A, if x == z, execute B. Otherwise, execute C. x is dropped
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in case of an OF match, *but it is kept if it reaches C*. You
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have to consume it to avoid PSP leak. (cont.)
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11
blk/043
11
blk/043
@ -1,8 +1,4 @@
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x CASE y OF A ENDOF z OF B ENDOF C ENDCASE: If x == y, execute
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A, if x == z, execute B. Otherwise, execute C. x is dropped
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in case of an OF match, *but it is kept if it reaches C*. You
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have to consume it to avoid PSP leak.
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(cont.)
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(br) -- Branches by the number specified in the 2
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following bytes. Can be negative.
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(?br) f -- Branch if f is false.
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@ -13,3 +9,8 @@ have to consume it to avoid PSP leak.
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ABORT -- Resets PS and RS and returns to interpreter.
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ABORT" x" -- *I* Compiles a ." followed by a ABORT.
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EXECUTE a -- Execute wordref at addr a
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INTERPRET -- Get a line from stdin, compile it in tmp memory,
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then execute the compiled contents.
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LEAVE -- In a DO..LOOP, exit at the next LOOP call.
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QUIT -- Return to interpreter prompt immediately
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EXIT! -- Exit current INTERPRET loop.
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5
blk/044
5
blk/044
@ -1,5 +0,0 @@
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INTERPRET -- Get a line from stdin, compile it in tmp memory,
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then execute the compiled contents.
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LEAVE -- In a DO..LOOP, exit at the next LOOP call.
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QUIT -- Return to interpreter prompt immediately
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EXIT! -- Exit current INTERPRET loop.
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8
blk/160
8
blk/160
@ -1,8 +0,0 @@
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TRS-80 Drivers
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Drivers for the TRS-80 keyboard, video and floppy. At the
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moment, they are thin layer over the drivers provided by
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TRSDOS' SVC.
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Load the Z80 words with "162 LOAD" and the high level part
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with "164 LOAD".
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13
blk/162
13
blk/162
@ -1,13 +0,0 @@
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CODE KEY
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A 0x01 LDrn, ( @KEY )
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0x28 RSTn,
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L A LDrr, H 0 LDrn,
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HL PUSHqq,
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;CODE
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CODE EMIT
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BC POPqq, ( c == @DSP arg )
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chkPS,
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A 0x02 LDrn, ( @DSP )
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0x28 RSTn,
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;CODE
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2
blk/209
2
blk/209
@ -3,7 +3,7 @@ OUT [nA, (C)r] IN [An, r(C)]
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SET [br] RES [br] BIT [br]
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RL [r] RLC [r] SLA [r] RLA RLCA
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RR [r] RRC [r] SRL [r] RRA RRCA
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CALL [nn] RST [n] DJNZ
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CALL [nn] DJNZ
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JP [nn, (HL), (IX), (IY)]
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JR [, Z, NZ, C, NC]
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8
blk/242
8
blk/242
@ -1,14 +1,16 @@
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: LDdd(nn), ( dd nn -- )
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( dd nn -- )
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: LDdd(nn),
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0xed A,
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SWAP <<4 0x4b OR A,
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A,,
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;
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: LD(nn)dd, ( nn dd -- )
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( nn dd -- )
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: LD(nn)dd,
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0xed A,
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<<4 0x43 OR A,
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A,,
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;
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: RSTn, 0xc7 OR A, ;
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: JP(IX), IX DROP JP(HL), ;
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: JP(IY), IY DROP JP(HL), ;
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1
blk/249
1
blk/249
@ -6,4 +6,3 @@
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: PUSHZ, BC 0 LDddnn, IFZ, BC INCss, THEN, BC PUSHqq, ;
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: HLZ, A H LDrr, L ORr, ;
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: DEZ, A D LDrr, E ORr, ;
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: LDDE(HL), E (HL) LDrr, HL INCss, D (HL) LDrr, ;
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10
blk/260
10
blk/260
@ -2,10 +2,7 @@ Cross compilation program
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This programs allows cross compilation of boot binary and
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icore. Run "262 LOAD" right before your cross compilation and
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then set XCURRENT to CURRENT.
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This unit depends on a properly initialized z80a with ORG and
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BIN( set. That is how we determine compilation offsets.
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then set XCURRENT to CURRENT and XCOFF to H@.
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This redefines defining words to achieve cross compilation.
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The goal is two-fold:
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@ -13,4 +10,7 @@ The goal is two-fold:
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1. Add an offset to all word references in definitions.
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2. Don't shadow important words we need right now.
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(cont.)
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Words overrides like ":", "IMMEDIATE" and "CODE" are not
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automatically shadowed to allow the harmless inclusion of
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this unit. This shadowing has to take place in your xcomp
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configuration. (cont.)
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9
blk/261
9
blk/261
@ -1,9 +1,6 @@
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Words overrides like ":", "IMMEDIATE" and "CODE" are not
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automatically shadowed to allow the harmless inclusion of
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this unit. This shadowing has to take place in your xcomp
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configuration.
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See example in /emul/xcomp.fs
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(cont.)
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See example in /emul/forth/xcomp.fs
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Why limit ourselves to icore? Oh, I've tried cross-compiling
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the whole shebang. I tried. And failed. Too dynamic.
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1
blk/263
1
blk/263
@ -1,4 +1,5 @@
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VARIABLE XCURRENT
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VARIABLE XOFF
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: XCON XCURRENT CURRENT* ! ;
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: XCOFF 0x02 RAM+ CURRENT* ! ;
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2
blk/265
2
blk/265
@ -4,7 +4,7 @@
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XCURRENT @ SWAP ( xcur w ) _find ( a f )
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IF ( a )
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DUP IMMED? IF ABORT THEN
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DUP ORG @ > IF ORG @ - BIN( @ + THEN ,
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DUP XOFF @ > IF XOFF @ - THEN ,
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ELSE ( w )
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0x02 RAM+ @ SWAP ( cur w ) _find ( a f )
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IF DUP IMMED? NOT IF ABORT THEN EXECUTE
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11
blk/301
11
blk/301
@ -1,10 +1,7 @@
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L3 BSET PC ORG @ 0x34 + ! ( execute )
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EXDEHL, ( HL now points to wordref )
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( We don't apply BIN( reliably on stable ABI stuff, we
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might need to adjust addr. Ugly, but well... )
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BIN( @ [IF]
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A XORr, H ORr, IFZ, H BIN( @ 256 / LDrn,
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[THEN]
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L3 BSET
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PC ORG @ 0x34 + ! ( execute )
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( DE points to wordref )
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EXDEHL,
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E (HL) LDrr,
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D BIN( @ 256 / LDrn,
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EXDEHL,
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10
blk/302
10
blk/302
@ -1,12 +1,16 @@
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L1 BSET PC ORG @ 0x0f + ! ( compiledWord )
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L1 BSET
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PC ORG @ 0x0f + ! ( compiledWord )
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( 1. Push current IP to RS
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2. Set new IP to the second atom of the list
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3. Execute the first atom of the list. )
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IY PUSHqq, HL POPqq, ( <-- IP )
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0x11 BCALL, ( 11 == pushRS )
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EXDEHL, ( HL points to PFA )
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( While we inc, dereference into DE for execute call later. )
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LDDE(HL),
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( While we increase, dereference into DE for execute call
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later. )
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E (HL) LDrr,
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HL INCss,
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D (HL) LDrr,
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HL INCss,
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HL PUSHqq, IY POPqq, ( --> IP )
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JR, L3 BWR ( execute-B301 )
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4
blk/426
4
blk/426
@ -6,7 +6,3 @@
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H@ 2- ( push a. -2 for allot offset )
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; IMMEDIATE
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: [IF]
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IF EXIT THEN
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LIT< [THEN] BEGIN DUP WORD S= UNTIL DROP ;
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: [THEN] ;
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BIN
emul/stage0.bin
BIN
emul/stage0.bin
Binary file not shown.
@ -10,11 +10,12 @@
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CURRENT @ XCURRENT !
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H@ 256 /MOD 2 PC! 2 PC!
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H@ XOFF !
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282 LOAD ( boot.z80 )
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393 LOAD ( icore )
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(entry) _
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( Update LATEST )
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PC ORG @ 8 + !
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H@ XOFF @ - XOFF @ 8 + !
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," CURRENT @ HERE ! "
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," : EMIT 0 PC! ; "
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," : KEY 0 PC@ ; "
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@ -16,13 +16,14 @@ RAMSTART 0x70 + CONSTANT ACIA_MEM
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CURRENT @ XCURRENT !
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H@ 256 /MOD 2 PC! 2 PC!
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H@ XOFF !
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282 LOAD ( boot.z80 )
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352 LOAD ( acia.z80 )
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372 LOAD ( sdc.z80 )
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393 LOAD ( icore )
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(entry) _
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( Update LATEST )
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PC ORG @ 8 + !
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H@ XOFF @ - XOFF @ 8 + !
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422 441 XPACKR ( core cmp )
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446 452 XPACKR ( parse )
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358 360 XPACKR ( acia.fs )
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@ -1,8 +1,30 @@
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TARGET = stage1.bin
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EDIR = ../../emul
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STAGE2 = $(EDIR)/stage2
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SHELLAPPS = zasm ed
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APPTARGETS = ${SHELLAPPS:%=cfsin/%}
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CFSTARGETS = $(APPTARGETS) cfsin/user.h
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TARGET = os.bin
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BASEDIR = ../..
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ZASM = $(BASEDIR)/emul/zasm/zasm
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KERNEL = $(BASEDIR)/kernel
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APPS = $(BASEDIR)/apps
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CFSPACK = $(BASEDIR)/tools/cfspack/cfspack
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.PHONY: all
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all: $(TARGET)
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$(TARGET): xcomp.fs $(STAGE2)
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cat xcomp.fs | $(STAGE2) > $@
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all: $(TARGET) floppy.cfs
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$(TARGET): glue.asm
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$(ZASM) $(KERNEL) $(APPS) < glue.asm > $@
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$(CFSPACK):
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make -C $(BASEDIR)/tools/cfspack
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floppy.cfs: $(CFSTARGETS) $(CFSPACK)
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$(CFSPACK) cfsin > $@
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$(APPTARGETS):
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$(ZASM) $(KERNEL) $(APPS) user.h < $(APPS)/${@:cfsin/%=%}/glue.asm > $@
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cfsin/user.h: user.h
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cp user.h $@
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.PHONY: clean
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clean:
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rm -f $(CFSTARGETS) floppy.cfs $(TARGET)
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@ -1,22 +0,0 @@
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0x6000 CONSTANT RAMSTART
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0xf000 CONSTANT RS_ADDR
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212 LOAD ( z80 assembler )
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262 LOAD ( xcomp )
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: CODE XCODE ;
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: IMMEDIATE XIMM ;
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: (entry) (xentry) ;
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: : [ ' X: , ] ;
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CURRENT @ XCURRENT !
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H@ 256 /MOD 2 PC! 2 PC!
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0x3000 BIN( !
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282 LOAD ( boot.z80 )
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162 LOAD ( trs80.z80 )
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393 LOAD ( icore )
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(entry) _
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( Update LATEST )
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PC ORG @ 8 + !
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422 463 XPACKR ( core cmp print parse readln fmt )
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," : _ RDLN$ (ok) ; _ "
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H@ 256 /MOD 2 PC! 2 PC!
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