nedoPC.org

10 FOR I=1 TO 10
20 LET @(I)=I*255
30 NEXT
40 FOR I=1 TO 10
50 PRINT I," : ",@(I)
60 NEXT

; 2024-03-15 Realised during testing that
;     ExpEvaluate can sometimes try to return
;     when stack isn't a return address.
;     Realised that ExpEvaluate must either
;     succeed or fail, with no backtrack.
;     This required substantial changes to
;     PrintSub, especially a change to how it
;     knows if it has just had a comma. This
;     is now done based on parity of H.
;     To be retested.
;
;     Had an idea that operators and statements
;     could reside on different pages, creating
;     more space for both, and perhaps removing
;     the need for some of the Jumps out of
;     page 2 to statement implementation.

;2024-03-23
;     Changed INPUT so that it doesn't display
;     a prompt. It was confusing to have the
;     > prompt as is used in direct mode. Instead
;     programs that need a prompt before input
;     can use the multistatement line
;     PRINT "?", INPUT A
; 2024-03-25 Found a fix for problem where
;     -32768/2 has wrong sign. It costs 3 bytes
;     so need to find 2 byte saving before Ready
;     and 1 byte saving after Ready
; 2024-03-26 In the process of making major
;     rearrangements to save several bytes and
;     fix the bug mentioned above.
; 2024-03-27 Major rearrangements have been done.
;      Net reault is to save 5 bytes, but need
;      to carefully check whether any same-page
;      assumptions are violated
; 2024-03-28 Found and fixed several bugs related
;          to above changes. Execution of ? token
;          seems to take too long, implying a
;          remaining bug. 9 bytes free now, 5 of
;          which are contiguous at the end of the
;          program.
; 2024-03-29 Two bugs to fix : prompt appears
;        twice after entering first line.
;          detection of syntax errors is slow
; 2024-04-01 Fixed several bugs introduced above.
;      Need to run all tests again.
; 2024-04-03 Changed newline behaviour so that
;      VT100 terminals require LNM reset rather
;      than set.
; 2024-04-04 Reclaimed 2 bytes in
;      DigitClassNotEnd. Used those two bytes to
;      add a colon token. It can be used as a
;      statement separator in multi-statement
;      lines.