dual DPTR support for STC15

platformio / platform-intel_mcs51

Intel MCS-51 (8051): development platform for PlatformIO

https://registry.platformio.org/platforms/platformio/intel_mcs51

Apache License 2.0

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dual DPTR support for STC15 #23

Closed NickLiu635 closed 1 year ago

NickLiu635 commented 5 years ago

STC15 series have dual DPTR, controlled via DPS at 0xA2.0.here's the document

P297 3.3.3 Dual Data Pointer Register(DPTR)

SDCC supports it.，p89c51r

https://sourceforge.net/p/sdcc/wiki/8051%20Variants/

STC15系列支持双DPTR，文档地址

P397 STC15系列8051 单片机双数据指针

看起来似乎SDCC支持这种双DPTR模式。 https://sourceforge.net/p/sdcc/wiki/8051%20Variants/ 能否让platform-intel_mcs51 支持呢？

zerog2k commented 5 years ago

Please see comments on PR #25

summary: I don't think those targets exist in current sdcc versions (maybe wiki is outdated?) Current SDCC manual shows (sec 4.1.2) that dual dptr not supported in mcs51 target.