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* A 'bowboard', a chessboard of rainbow circlesKartik K. Agaram2021-05-081-23/+31
| | | | Compare with (chessboard screen 256)
* a full-circle rainbowKartik K. Agaram2021-05-082-3/+30
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* new shell macro: doKartik K. Agaram2021-05-071-2/+3
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* always check for null in 'index' instructionsKartik K. Agaram2021-05-076-95/+132
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* all apps working again after null get checkKartik K. Agaram2021-05-072-2/+34
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* .Kartik K. Agaram2021-05-072-39/+39
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* always check for null in 'get' instructionsKartik K. Agaram2021-05-075-14/+51
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* a little bit more information when lookup failsKartik K. Agaram2021-05-071-1/+31
| | | | | | Basically this should never, ever happen until I start reclaiming heap memory. I believe the only reason it happens is unprotected writes to address 0 or thereabouts.
* an often-overflowing stream when running brcircleKartik K. Agaram2021-05-072-1/+3
| | | | We really need to systematically check our trace streams.
* .Kartik K. Agaram2021-05-072-6/+8
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* some boot-time heartbeat messagesKartik K. Agaram2021-05-072-1/+20
| | | | This will help us with some common debug scenarios.
* .Kartik K. Agaram2021-05-071-19/+19
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* clean up all definitionsKartik K. Agaram2021-05-071-21/+20
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* clean up chessboardKartik K. Agaram2021-05-072-11/+15
| | | | | We still benefit from some helpers here because of the unrolling and multiple calls to helpers.
* clean up read_lineKartik K. Agaram2021-05-071-9/+6
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* clean up Bresenham line-drawingKartik K. Agaram2021-05-072-26/+54
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* .Kartik K. Agaram2021-05-071-6/+6
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* no, we need hline1 for fill_rectKartik K. Agaram2021-05-071-8/+10
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* clean up hline and vlineKartik K. Agaram2021-05-071-10/+10
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* starting to implement first macrosKartik K. Agaram2021-05-074-0/+20
| | | | | | | | | | | | | | | Another commit, another bugfix. Some snippets from my currently exploding todo list: - always investigate lookup errors immediately. Beyond the root cause, they should never happen at the moment, while we aren't reclaiming memory. we should always return a more precise error message. Usually involving null pointer checks. - on abort, print out stack trace - emit mapping of labels to addresses during survey - store a mapping of symbols somewhere in the code image - stop allocating 1KB per token; expand space for tokens as needed
* give up on nested backquotes for nowKartik K. Agaram2021-05-072-7/+82
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* macros almost doneKartik K. Agaram2021-05-061-23/+69
| | | | Just one case left: macros within unquote.
* some more casesKartik K. Agaram2021-05-061-11/+60
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* first passing test for macroexpandKartik K. Agaram2021-05-066-41/+249
| | | | | | | | In the process I spent a long time tracking down a stray TODO in 108write.subx that I thought would abort but didn't since the switch to baremetal. Then after I reintroduced that assertion I had to go track down a bunch of buffer sizes. Stream sizes continue to be a huge mess.
* .Kartik K. Agaram2021-05-061-1/+1
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* more paranoia in shell/globals.muKartik K. Agaram2021-05-061-0/+48
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* shell: macroexpand outermost callKartik K. Agaram2021-05-062-1/+65
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* literal macrosKartik K. Agaram2021-05-061-0/+28
| | | | | | | | | | | Current plan: - some way to define macros. For now: (def f (litmac litfn () (a b) `(+ ,a , b))) - macroexpand will expand calls by passing them through the cdr (f 3 4) macroexpand: ((litfn () (a b) `(+ ,a ,b)) 3 4) => (+ 3 4) eval: (+ 3 4) => 7
* .Kartik K. Agaram2021-05-061-2/+15
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* back to macros; switch macroexpand to operate in placeKartik K. Agaram2021-05-062-20/+9
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* belatedly migrate stale example definitionsKartik K. Agaram2021-05-064-93/+99
| | | | | Also bare-bones syntax highlighting for .limg files. Doesn't work when .limg file is first file opened with Vim.
* .Kartik K. Agaram2021-05-061-4/+21
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* .Kartik K. Agaram2021-05-042-0/+41
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* .Kartik K. Agaram2021-05-042-3/+25
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* .Kartik K. Agaram2021-05-041-1/+1
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* shell: start implementing macrosKartik K. Agaram2021-05-042-1/+7
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* .Kartik K. Agaram2021-05-041-6/+6
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* shell: unquote spliceKartik K. Agaram2021-05-042-1/+121
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* shell: unquoteKartik K. Agaram2021-05-041-2/+78
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* shell: start evaluating backquoteKartik K. Agaram2021-05-031-0/+146
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* .Kartik K. Agaram2021-05-031-0/+1
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* .Kartik K. Agaram2021-05-031-63/+63
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* .Kartik K. Agaram2021-05-031-0/+21
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* .Kartik K. Agaram2021-05-031-1/+1
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* reading and printing backquotes and unquotesKartik K. Agaram2021-05-033-26/+255
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* printing quoted expressionsKartik K. Agaram2021-05-021-0/+14
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* .Kartik K. Agaram2021-05-021-5/+5
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* .Kartik Agaram2021-05-021-1/+44
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* .Kartik Agaram2021-05-0121-6684/+7950
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* tool: compute nearby colors in default paletteKartik K. Agaram2021-05-012-1/+235
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