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https://github.com/hsoft/collapseos.git
synced 2024-11-23 22:38:06 +11:00
d09de0a0d3
In the beginning of Collapse OS' Forth version, the readline sub- system was optional. This is why we had this separate RDLN$ routine and that the input buffer was allocated at boot time. It's been a while since the RDLN system has been made mandatory, but we still paid the complexity tax of this separation. Not anymore.
43 lines
1.1 KiB
Forth
43 lines
1.1 KiB
Forth
( 8K of onboard RAM )
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0xdd00 CONSTANT RS_ADDR
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( Memory register at the end of RAM. Must not overwrite )
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0xddca CONSTANT PS_ADDR
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RS_ADDR 0xb0 - CONSTANT SYSVARS
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0xc000 CONSTANT HERESTART
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0xbf CONSTANT TMS_CTLPORT
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0xbe CONSTANT TMS_DATAPORT
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SYSVARS 0xa0 + CONSTANT GRID_MEM
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SYSVARS 0xa3 + CONSTANT CPORT_MEM
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0x3f CONSTANT CPORT_CTL
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0xdc CONSTANT CPORT_D1
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0xdd CONSTANT CPORT_D2
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SYSVARS 0xa4 + CONSTANT PAD_MEM
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5 LOAD ( z80 assembler )
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262 LOAD ( xcomp )
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524 LOAD ( font compiler )
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165 LOAD ( Sega ROM signer )
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282 LOAD ( boot.z80.decl )
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270 LOAD ( xcomp overrides )
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DI, 0x100 JP, 0x62 ALLOT0 ( 0x66 )
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RETN, 0x98 ALLOT0 ( 0x100 )
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( All set, carry on! )
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CURRENT @ XCURRENT !
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0x100 BIN( !
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283 335 LOADR ( boot.z80 )
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353 LOAD ( xcomp core low )
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CREATE ~FNT CPFNT7x7
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470 472 LOADR ( TMS9918 )
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602 604 LOADR ( VDP )
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402 404 LOADR ( Grid )
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625 626 LOADR ( SMS ports )
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612 617 LOADR ( PAD )
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390 LOAD ( xcomp core high )
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(entry) _
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( Update LATEST )
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PC ORG @ 8 + !
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," VDP$ GRID$ PAD$ (im1) " EOT,
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ORG @ 0x100 - DUP |M 2 PC! 2 PC!
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DUP 1 ( 16K ) segasig
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0x4000 + |M 2 PC! 2 PC!
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